2-[1-[tert-butyl(dimethyl)silyl]oxycyclobutyl]acetaldehyde

Conditions: temp:-78.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 2,2,6,6-tetramethylpiperidine (13.0 ml, 76.5 mmol) was dissolved in 500 ml THF and cooled to −78° C. Butyllithium (26.8 ml, 67.0 mmol) was added over the period of 10 min and the reaction was allowed to warm up to 0° C. and kept there for 3 min. The mixture was cooled back to −78° C. and a solution of 2-fluoro-5-neopentylpyridine (8.000 g, 47.8 mmol) in 10 ml THF was added over the period of 30 min. The mixture was stirred for 20 min at the same temperature and a solution of 2-(1-(tert-butyldimethylsilyloxy)cyclobutyl) acetaldehyde (19.7 g, 86.1 mmol) in 25 ml THF was added over the period of 20 min. The reaction was stirred for 15 min at the same temperature and hydrolyzed with 200 ml of H2O. The mixture was allowed to warm up to room temp and extracted 2 times with 1 L EtOAc (each). The combined organic extracts were dried over MgSO4 and evaporated. The crude material was used without further purification. MS found 396.2. to warm up to 0° C. The mixture was cooled back to −78° C. to warm up to room temp extracted 2 times with 1 L EtOAc (each) The combined organic extracts were dried over MgSO4 evaporated The crude material was used without further purification

Conditions: temp:-78.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 2,2,6,6-tetramethylpiperidine (13.0 ml, 76.5 mmol) was dissolved in 500 ml THF and cooled to −78° C. Butyllithium (26.8 ml, 67.0 mmol) was added over the period of 10 min and the reaction was allowed to warm up to 0° C. and kept there for 3 min. The mixture was cooled back to −78° C. and a solution of 2-fluoro-5-neopentylpyridine (8.000 g, 47.8 mmol) in 10 ml THF was added over the period of 30 min. The mixture was stirred for 20 min at the same temperature and a solution of 2-(1-(tert-butyldimethylsilyloxy)cyclobutyl) acetaldehyde (19.7 g, 86.1 mmol) in 25 ml THF was added over the period of 20 min. The reaction was stirred for 15 min at the same temperature and hydrolyzed with 200 ml of H2O. The mixture was allowed to warm up to room temp and extracted 2 times with 1 L EtOAc (each). The combined organic extracts were dried over MgSO4 and evaporated. The crude material was used without further purification. MS found 396.2. to warm up to 0° C. The mixture was cooled back to −78° C. to warm up to room temp extracted 2 times with 1 L EtOAc (each) The combined organic extracts were dried over MgSO4 evaporated The crude material was used without further purification

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a 2 L round bottomed flask was added 3-(1-(tert-butyldimethylsilyloxy)cyclobutyl)propane-1,2-diol (80.0 g, 307 mmol) and THF/t-BuOH/H2O (1:1:2, 2 L). Sodium periodate (120.15 g, 562 mmol) was added and the reaction was stirred at RT. After addition the solution became yellow and thickened. The stirrer was adjusted to maintain stirring. After 1.5 h, the reaction is complete as monitored by TLC (10% EtOAc/Hexane). 300 mL H2O was added to the reaction and the aqueous solution was extracted with ether (3×600 mL). The combined organics were dried over MgSO4 and carefully concentrated in vacuo (Note: volatile product). The oil was re-dissolved in 200 mL of benzene and azeotroped to remove any excess t-BuOH. The crude oil was adsorbed onto a plug of silica gel and chromatographed through a glass column, eluting with 3% EtOAc in hexane, to provide a golden oil after concentrating in vacuo (Note: volatile product). The oil was dissolved in 200 mL of benzene and concentrated in vacuo. The mixture was further concentrated to remove excess benzene to give 2-(1-(tert-butyldimethylsilyloxy)cyclobutyl) acetaldehyde (67.5 g, 296 mmol, 96.2% yield). The title compound yielded contained some benzene and was carried forward without further purification. After addition the solution to maintain stirring the aqueous solution was extracted with ether (3×600 mL) The combined organics were dried over MgSO4 carefully concentrated in vacuo (Note: volatile product) The oil was re-dissolved in 200 mL of benzene azeotroped to remove any excess t-BuOH chromatographed through a glass column eluting with 3% EtOAc in hexane to provide a golden oil after concentrating in vacuo (Note: volatile product) The oil was dissolved in 200 mL of benzene concentrated in vacuo The mixture was further concentrated to remove excess benzene

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a 2 L round bottomed flask was added 3-(1-(tert-butyldimethylsilyloxy)cyclobutyl)propane-1,2-diol (80.0 g, 307 mmol) and THF/t-BuOH/H2O (1:1:2, 2 L). Sodium periodate (120.15 g, 562 mmol) was added and the reaction was stirred at RT. After addition the solution became yellow and thickened. The stirrer was adjusted to maintain stirring. After 1.5 h, the reaction is complete as monitored by TLC (10% EtOAc/Hexane). 300 mL H2O was added to the reaction and the aqueous solution was extracted with ether (3×600 mL). The combined organics were dried over MgSO4 and carefully concentrated in vacuo (Note: volatile product). The oil was re-dissolved in 200 mL of benzene and azeotroped to remove any excess t-BuOH. The crude oil was adsorbed onto a plug of silica gel and chromatographed through a glass column, eluting with 3% EtOAc in hexane, to provide a golden oil after concentrating in vacuo (Note: volatile product). The oil was dissolved in 200 mL of benzene and concentrated in vacuo. The mixture was further concentrated to remove excess benzene to give 2-(1-(tert-butyldimethylsilyloxy)cyclobutyl) acetaldehyde (67.5 g, 296 mmol, 96.2% yield). The title compound yielded contained some benzene and was carried forward without further purification. After addition the solution to maintain stirring the aqueous solution was extracted with ether (3×600 mL) The combined organics were dried over MgSO4 carefully concentrated in vacuo (Note: volatile product) The oil was re-dissolved in 200 mL of benzene azeotroped to remove any excess t-BuOH chromatographed through a glass column eluting with 3% EtOAc in hexane to provide a golden oil after concentrating in vacuo (Note: volatile product) The oil was dissolved in 200 mL of benzene concentrated in vacuo The mixture was further concentrated to remove excess benzene

Conditions: temp:-78.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 2,2,6,6-tetramethylpiperidine (13.0 ml, 76.5 mmol) was dissolved in 500 ml THF and cooled to −78° C. Butyllithium (26.8 ml, 67.0 mmol) was added over the period of 10 min and the reaction was allowed to warm up to 0° C. and kept there for 3 min. The mixture was cooled back to −78° C. and a solution of 2-fluoro-5-neopentylpyridine (8.000 g, 47.8 mmol) in 10 ml THF was added over the period of 30 min. The mixture was stirred for 20 min at the same temperature and a solution of 2-(1-(tert-butyldimethylsilyloxy)cyclobutyl) acetaldehyde (19.7 g, 86.1 mmol) in 25 ml THF was added over the period of 20 min. The reaction was stirred for 15 min at the same temperature and hydrolyzed with 200 ml of H2O. The mixture was allowed to warm up to room temp and extracted 2 times with 1 L EtOAc (each). The combined organic extracts were dried over MgSO4 and evaporated. The crude material was used without further purification. MS found 396.2. to warm up to 0° C. The mixture was cooled back to −78° C. to warm up to room temp extracted 2 times with 1 L EtOAc (each) The combined organic extracts were dried over MgSO4 evaporated The crude material was used without further purification

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a 2 L round bottomed flask was added 3-(1-(tert-butyldimethylsilyloxy)cyclobutyl)propane-1,2-diol (80.0 g, 307 mmol) and THF/t-BuOH/H2O (1:1:2, 2 L). Sodium periodate (120.15 g, 562 mmol) was added and the reaction was stirred at RT. After addition the solution became yellow and thickened. The stirrer was adjusted to maintain stirring. After 1.5 h, the reaction is complete as monitored by TLC (10% EtOAc/Hexane). 300 mL H2O was added to the reaction and the aqueous solution was extracted with ether (3×600 mL). The combined organics were dried over MgSO4 and carefully concentrated in vacuo (Note: volatile product). The oil was re-dissolved in 200 mL of benzene and azeotroped to remove any excess t-BuOH. The crude oil was adsorbed onto a plug of silica gel and chromatographed through a glass column, eluting with 3% EtOAc in hexane, to provide a golden oil after concentrating in vacuo (Note: volatile product). The oil was dissolved in 200 mL of benzene and concentrated in vacuo. The mixture was further concentrated to remove excess benzene to give 2-(1-(tert-butyldimethylsilyloxy)cyclobutyl) acetaldehyde (67.5 g, 296 mmol, 96.2% yield). The title compound yielded contained some benzene and was carried forward without further purification. After addition the solution to maintain stirring the aqueous solution was extracted with ether (3×600 mL) The combined organics were dried over MgSO4 carefully concentrated in vacuo (Note: volatile product) The oil was re-dissolved in 200 mL of benzene azeotroped to remove any excess t-BuOH chromatographed through a glass column eluting with 3% EtOAc in hexane to provide a golden oil after concentrating in vacuo (Note: volatile product) The oil was dissolved in 200 mL of benzene concentrated in vacuo The mixture was further concentrated to remove excess benzene

Conditions: temp:-78.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 2,2,6,6-tetramethylpiperidine (13.0 ml, 76.5 mmol) was dissolved in 500 ml THF and cooled to −78° C. Butyllithium (26.8 ml, 67.0 mmol) was added over the period of 10 min and the reaction was allowed to warm up to 0° C. and kept there for 3 min. The mixture was cooled back to −78° C. and a solution of 2-fluoro-5-neopentylpyridine (8.000 g, 47.8 mmol) in 10 ml THF was added over the period of 30 min. The mixture was stirred for 20 min at the same temperature and a solution of 2-(1-(tert-butyldimethylsilyloxy)cyclobutyl)acetaldehyde (19.7 g, 86.1 mmol) in 25 ml THF was added over the period of 20 min. The reaction was stirred for 15 min at the same temperature and hydrolyzed with 200 ml of H2O. The mixture was allowed to warm up to room temp and extracted 2 times with 1 L EtOAc (each). The combined organic extracts were dried over MgSO4 and evaporated. The crude material was used without further purification. MS found 396.2. to warm up to 0° C. The mixture was cooled back to −78° C. to warm up to room temp extracted 2 times with 1 L EtOAc (each) The combined organic extracts were dried over MgSO4 evaporated The crude material was used without further purification

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a 2 L round bottomed flask was added 3-(1-(tert-butyldimethylsilyloxy)cyclobutyl)propane-1,2-diol (80.0 g, 307 mmol) and THF/t-BuOH/H2O (1:1:2, 2 L). Sodium periodate (120.15 g, 562 mmol) was added and the reaction was stirred at RT. After addition the solution became yellow and thickened. The stirrer was adjusted to maintain stirring. After 1.5 h, the reaction is complete as monitored by TLC (10% EtOAc/Hexane). 300 mL H2O was added to the reaction and the aqueous solution was extracted with ether (3×600 mL). The combined organics were dried over MgSO4 and carefully concentrated in vacuo (Note: volatile product). The oil was re-dissolved in 200 mL of benzene and azeotroped to remove any excess t-BuOH. The crude oil was adsorbed onto a plug of silica gel and chromatographed through a glass column, eluting with 3% EtOAc in hexane, to provide a golden oil after concentrating in vacuo (Note: volatile product). The oil was dissolved in 200 mL of benzene and concentrated in vacuo. The mixture was further concentrated to remove excess benzene to give 2-(1-(tert-butyldimethylsilyloxy)cyclobutyl)acetaldehyde (67.5 g, 296 mmol, 96.2% yield). The title compound yielded contained some benzene and was carried forward without further purification. After addition the solution to maintain stirring the aqueous solution was extracted with ether (3×600 mL) The combined organics were dried over MgSO4 carefully concentrated in vacuo (Note: volatile product) The oil was re-dissolved in 200 mL of benzene azeotroped to remove any excess t-BuOH chromatographed through a glass column eluting with 3% EtOAc in hexane to provide a golden oil after concentrating in vacuo (Note: volatile product) The oil was dissolved in 200 mL of benzene concentrated in vacuo The mixture was further concentrated to remove excess benzene

Conditions: temp:-78.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 2,2,6,6-tetramethylpiperidine (13.0 ml, 76.5 mmol) was dissolved in 500 ml THF and cooled to −78° C. Butyllithium (26.8 ml, 67.0 mmol) was added over the period of 10 min and the reaction was allowed to warm up to 0° C. and kept there for 3 min. The mixture was cooled back to −78° C. and a solution of 2-fluoro-5-neopentylpyridine (8.000 g, 47.8 mmol) in 10 ml THF was added over the period of 30 min. The mixture was stirred for 20 min at the same temperature and a solution of 2-(1-(tert-butyldimethylsilyloxy)cyclobutyl) acetaldehyde (19.7 g, 86.1 mmol) in 25 ml THF was added over the period of 20 min. The reaction was stirred for 15 min at the same temperature and hydrolyzed with 200 ml of H2O. The mixture was allowed to warm up to room temp and extracted 2 times with 1 L EtOAc (each). The combined organic extracts were dried over MgSO4 and evaporated. The crude material was used without further purification. MS found 396.2. to warm up to 0° C. The mixture was cooled back to −78° C. to warm up to room temp extracted 2 times with 1 L EtOAc (each) The combined organic extracts were dried over MgSO4 evaporated The crude material was used without further purification

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a 2 L round bottomed flask was added 3-(1-(tert-butyldimethylsilyloxy)cyclobutyl)propane-1,2-diol (80.0 g, 307 mmol) and THF/t-BuOH/H2O (1:1:2, 2 L). Sodium periodate (120.15 g, 562 mmol) was added and the reaction was stirred at RT. After addition the solution became yellow and thickened. The stirrer was adjusted to maintain stirring. After 1.5 h, the reaction is complete as monitored by TLC (10% EtOAc/Hexane). 300 mL H2O was added to the reaction and the aqueous solution was extracted with ether (3×600 mL). The combined organics were dried over MgSO4 and carefully concentrated in vacuo (Note: volatile product). The oil was re-dissolved in 200 mL of benzene and azeotroped to remove any excess t-BuOH. The crude oil was adsorbed onto a plug of silica gel and chromatographed through a glass column, eluting with 3% EtOAc in hexane, to provide a golden oil after concentrating in vacuo (Note: volatile product). The oil was dissolved in 200 mL of benzene and concentrated in vacuo. The mixture was further concentrated to remove excess benzene to give 2-(1-(tert-butyldimethylsilyloxy)cyclobutyl) acetaldehyde (67.5 g, 296 mmol, 96.2% yield). The title compound yielded contained some benzene and was carried forward without further purification. After addition the solution to maintain stirring the aqueous solution was extracted with ether (3×600 mL) The combined organics were dried over MgSO4 carefully concentrated in vacuo (Note: volatile product) The oil was re-dissolved in 200 mL of benzene azeotroped to remove any excess t-BuOH chromatographed through a glass column eluting with 3% EtOAc in hexane to provide a golden oil after concentrating in vacuo (Note: volatile product) The oil was dissolved in 200 mL of benzene concentrated in vacuo The mixture was further concentrated to remove excess benzene