methyl 2-[(2E)-2-bromocyclooct-2-en-1-yl]-2-hydroxyacetate

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

Procedure: 150 μl of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU, 1 mmol) are added to a solution of methyl 2-bromocyclooctene-3-glycolate 17 (0.5 mmol) in anhydrous DMSO at 60° C. After stirring for 15 min, an additional 600 μl of DBU (4 mmol) are added and then the combined mixture is stirred overnight at 60° C. The mixture is acidified with 1M HCl and extracted with AcOEt. The organic phase is filtered through a separating filter and is concentrated under vacuum. The cyclooct-1-yn-3-glycolic acid 18 is purified on a preparative plate (CH2Cl2/MeOH 9/1) and is obtained with a yield of 55% (w=50 mg). the combined mixture is stirred overnight at 60° C extracted with AcOEt The organic phase is filtered through a separating filter is concentrated under vacuum The cyclooct-1-yn-3-glycolic acid 18 is purified on a preparative plate (CH2Cl2/MeOH 9/1) is obtained with a yield of 55% (w=50 mg)

Conditions: temp:0.00; pressure:0.00; stir:

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

Procedure: Added to a solution of 8,8-dibromobicyclo[5.1.0]octane (2.5 g i.e. 9.3 mmol) and methyl glycolate (6.35 ml, i.e. 83.9 mmol) dissolved in 5 ml of anhydrous toluene in a dry round-bottomed flask, under Ar and protected from the light by aluminium foil, are 3.85 g of silver perchlorate (i.e. 18.6 mmol). The reaction is stirred for 1 h 30 min at room temperature, then the silver salts are filtered over a frit and washed with AcOEt. The solution is concentrated under vacuum to give a viscous brown oil which is purified by silica gel chromatography (2-15% AcOEt in cyclohexane) to obtain the product in the form of a yellow oil having a mass m=1.6 g, i.e. 65% yield. the silver salts are filtered over a frit washed with AcOEt The solution is concentrated under vacuum to give a viscous brown oil which is purified by silica gel chromatography (2-15% AcOEt in cyclohexane) to obtain the product in the form of a yellow oil

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

Procedure: Added to a solution of 8,8-dibromobicyclo[5.1.0]octane (2.5 g i.e. 9.3 mmol) and methyl glycolate (6.35 ml, i.e. 83.9 mmol) dissolved in 5 ml of anhydrous toluene in a dry round-bottomed flask, under Ar and protected from the light by aluminium foil, are 3.85 g of silver perchlorate (i.e. 18.6 mmol). The reaction is stirred for 1 h 30 min at room temperature, then the silver salts are filtered over a frit and washed with AcOEt. The solution is concentrated under vacuum to give a viscous brown oil which is purified by silica gel chromatography (2-15% AcOEt in cyclohexane) to obtain the product in the form of a yellow oil having a mass m=1.6 g, i.e. 65% yield. the silver salts are filtered over a frit washed with AcOEt The solution is concentrated under vacuum to give a viscous brown oil which is purified by silica gel chromatography (2-15% AcOEt in cyclohexane) to obtain the product in the form of a yellow oil

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

Procedure: Added to a solution of 8,8-dibromobicyclo[5.1.0]octane (2.5 g i.e. 9.3 mmol) and methyl glycolate (6.35 ml, i.e. 83.9 mmol) dissolved in 5 ml of anhydrous toluene in a dry round-bottomed flask, under Ar and protected from the light by aluminium foil, are 3.85 g of silver perchlorate (i.e. 18.6 mmol). The reaction is stirred for 1 h 30 min at room temperature, then the silver salts are filtered over a frit and washed with AcOEt. The solution is concentrated under vacuum to give a viscous brown oil which is purified by silica gel chromatography (2-15% AcOEt in cyclohexane) to obtain the product in the form of a yellow oil having a mass m=1.6 g, i.e. 65% yield. the silver salts are filtered over a frit washed with AcOEt The solution is concentrated under vacuum to give a viscous brown oil which is purified by silica gel chromatography (2-15% AcOEt in cyclohexane) to obtain the product in the form of a yellow oil

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

Procedure: 150 μl of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU, 1 mmol) are added to a solution of methyl 2-bromocyclooctene-3-glycolate 17 (0.5 mmol) in anhydrous DMSO at 60° C. After stirring for 15 min, an additional 600 μl of DBU (4 mmol) are added and then the combined mixture is stirred overnight at 60° C. The mixture is acidified with 1M HCl and extracted with AcOEt. The organic phase is filtered through a separating filter and is concentrated under vacuum. The cyclooct-1-yn-3-glycolic acid 18 is purified on a preparative plate (CH2Cl2/MeOH 9/1) and is obtained with a yield of 55% (w=50 mg). the combined mixture is stirred overnight at 60° C extracted with AcOEt The organic phase is filtered through a separating filter is concentrated under vacuum The cyclooct-1-yn-3-glycolic acid 18 is purified on a preparative plate (CH2Cl2/MeOH 9/1) is obtained with a yield of 55% (w=50 mg)

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

Procedure: 3.85 g of silver perchlorate (18.6 mmol) are added to a solution of 8,8-dibromobicyclo[5.1.0]octane 16 (2.5 g, 9.3 mmol) and methyl glycolate (6.35 ml, 83.9 mmol) dissolved in 5 ml of anhydrous toluene in a dry round-bottomed flask under Ar protected from light by an aluminum film. The reaction mixture is stirred at ambient temperature for 1 h 30 and then the silver salts are filtered off through a sintered glass funnel and washed with AcOEt. The solution is concentrated under vacuum to give a viscous brown oil which is purified by chromatography on silica gel (cyclohexane/2-15% AcOEt) to produce 17 in the form of a yellow oil (w=1.7 g, i.e. 66% yield). the silver salts are filtered off through a sintered glass funnel washed with AcOEt The solution is concentrated under vacuum to give a viscous brown oil which is purified by chromatography on silica gel (cyclohexane/2-15% AcOEt)

Conditions: temp:0.00; pressure:0.00; stir:

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

Procedure: 150 μl of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU, 1 mmol) are added to a solution of methyl 2-bromocyclooctene-3-glycolate 17 (0.5 mmol) in anhydrous DMSO at 60° C. After stirring for 15 min, an additional 600 μl of DBU (4 mmol) are added and then the combined mixture is stirred overnight at 60° C. The mixture is acidified with 1M HCl and extracted with AcOEt. The organic phase is filtered through a separating filter and is concentrated under vacuum. The cyclooct-1-yn-3-glycolic acid 18 is purified on a preparative plate (CH2Cl2/MeOH 9/1) and is obtained with a yield of 55% (w=50 mg). the combined mixture is stirred overnight at 60° C extracted with AcOEt The organic phase is filtered through a separating filter is concentrated under vacuum The cyclooct-1-yn-3-glycolic acid 18 is purified on a preparative plate (CH2Cl2/MeOH 9/1) is obtained with a yield of 55% (w=50 mg)

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

Procedure: 3.85 g of silver perchlorate (18.6 mmol) are added to a solution of 8,8-dibromobicyclo[5.1.0]octane 16 (2.5 g, 9.3 mmol) and methyl glycolate (6.35 ml, 83.9 mmol) dissolved in 5 ml of anhydrous toluene in a dry round-bottomed flask under Ar protected from light by an aluminum film. The reaction mixture is stirred at ambient temperature for 1 h 30 and then the silver salts are filtered off through a sintered glass funnel and washed with AcOEt. The solution is concentrated under vacuum to give a viscous brown oil which is purified by chromatography on silica gel (cyclohexane/2-15% AcOEt) to produce 17 in the form of a yellow oil (w=1.7 g, i.e. 66% yield). the silver salts are filtered off through a sintered glass funnel washed with AcOEt The solution is concentrated under vacuum to give a viscous brown oil which is purified by chromatography on silica gel (cyclohexane/2-15% AcOEt)

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

Procedure: To a solution of 8,8-dibromobicyclo[5.1.0]octane (2.5 g, i.e. 9.3 mmol) and of methyl glycolate (6.32 mL, i.e. 83.9 mmol) dissolved in 5 mL of anhydrous toluene in a dry round-bottomed flask, under Ar and protected from light by a film of aluminum, are added 3.85 g of silver perchlorate (i.e. 18.6 mmol). The reaction is stirred for 1 hour 30 minutes at room temperature, and the silver salts are then filtered off on a sinter and washed with EtOAc. The solution is concentrated under vacuum to give a viscous brown oil, which is purified by chromatography on silica gel (2-150 EtOAc in cyclohexane) to give the product in the form of a yellow oil of mass m=1.6 g, i.e. 65% yield. the silver salts are then filtered off on a sinter washed with EtOAc The solution is concentrated under vacuum to give a viscous brown oil, which is purified by chromatography on silica gel (2-150 EtOAc in cyclohexane) to give the product in the form of a yellow oil of mass m=1.6 g, i.e. 65% yield

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

Procedure: Added to a solution of 8,8-dibromobicyclo[5.1.0]octane (2.5 g i.e. 9.3 mmol) and methyl glycolate (6.35 ml, i.e. 83.9 mmol) dissolved in 5 ml of anhydrous toluene in a dry round-bottomed flask, under Ar and protected from the light by aluminium foil, are 3.85 g of silver perchlorate (i.e. 18.6 mmol). The reaction is stirred for 1 h 30 min at room temperature, then the silver salts are filtered over a frit and washed with AcOEt. The solution is concentrated under vacuum to give a viscous brown oil which is purified by silica gel chromatography (2-15% AcOEt in cyclohexane) to obtain the product in the form of a yellow oil having a mass m=1.6 g, i.e. 65% yield. the silver salts are filtered over a frit washed with AcOEt The solution is concentrated under vacuum to give a viscous brown oil which is purified by silica gel chromatography (2-15% AcOEt in cyclohexane) to obtain the product in the form of a yellow oil