phenyl-di(propan-2-yloxy)borane

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

Conditions: temp:100.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 0.23 g (0.2 mmol) of tetrakistriphenylphosphinepalladium is added under nitrogen to a solution of 2.93 g (9 mmol) of 2,2-dimethyl-5-trifluoromethylsulfonyloxy-4H-(1,3)benzodioxin-4-one in 50 ml of dimethylformamide, the mixture is stirred for a few minutes and 2.97 g (14 mmol) of potassium phosphate and 2.04 g (9.9 mmol) of diisopropyl phenylboronate are then added. The mixture is heated to 100° C. until conversion is complete (about 16 h). After cooling, the reaction solution is poured into a mixture of 250 ml of water and 6 g of orthophosphoric acid and extracted three times with methyl tert-butyl ether, and the combined organic phases are washed with water and saturated sodium chloride solution, dried over sodium sulfate and concentrated. 2.6 g of a dark oil remain, which is chromatographed on silica gel using toluene/acetone. 1.3 g (57%) of a colorless solid are obtained, m.p. 158°-163° C. (recrystallized from hexane). (about 16 h) After cooling extracted three times with methyl tert-butyl ether the combined organic phases are washed with water and saturated sodium chloride solution dried over sodium sulfate concentrated which is chromatographed on silica gel

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

Procedure: Following the procedure of Example 9, phenyllithium (17 mL, 30.6 mmol) and triisopropoxyborane (5.6 g, 30 mmol) were reacted, and the reaction quenched with acetyl chloride (2.1 mL, 30 mmol) to yield after distillation 5.2 g (25.2 mmol, 84%). were reacted to yield after distillation 5.2 g (25.2 mmol, 84%)

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

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

Procedure: The title compound was prepared following the method of Example 14, using 1-hexynyllithium (64 mmol) prepared from 1-hexyne and n-butyl lithium in ethyl ether (64 mL) and phenyldiisopropoxyborane (11.96 g, 58 mmol) dissolved in ethyl ether (60 mL) and quenched with hydrogen chloride in ethyl ether (18.7 mL, 64 mmol). Yield. 11.2 g (86%), bp 102°-105° C. (0.4 mm Hg); n20D 1.5008; proton NMR (CDCl3) δ7.90 (m, 2H), 7.31 (m, 3H), 4.87 (septet, J=18 Hz, 1H), 2.33 (triplet, J=18 Hz, 2H), 1.23 (d, J=18 Hz, 6H), 0.90 (triplet, 3H); boron NMR (CDCl3) δ+36.5 ppm(s); mass spectrum (chemical ionization, isobutene) m/e 229 (M+H, 10%); IR (thin film) 2195, 1324 cm-1. Yield

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

Procedure: Following the procedure of Example 9, phenyllithium (17 mL, 30.6 mmol) and triisopropoxyborane (5.6 g, 30 mmol) were reacted, and the reaction quenched with acetyl chloride (2.1 mL, 30 mmol) to yield after distillation 5.2 g (25.2 mmol, 84%). were reacted to yield after distillation 5.2 g (25.2 mmol, 84%)

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

Procedure: Following the procedure of Example 9, phenyllithium (17 mL, 30.6 mmol) and triisopropoxyborane (5.6 g, 30 mmol) were reacted, and the reaction quenched with acetyl chloride (2.1 mL, 30 mmol) to yield after distillation 5.2 g (25.2 mmol, 84%). were reacted to yield after distillation 5.2 g (25.2 mmol, 84%)

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

Procedure: Following the procedure of Example 9, phenyllithium (17 mL, 30.6 mmol) and triisopropoxyborane (5.6 g, 30 mmol) were reacted, and the reaction quenched with acetyl chloride (2.1 mL, 30 mmol) to yield after distillation 5.2 g (25.2 mmol, 84%). were reacted to yield after distillation 5.2 g (25.2 mmol, 84%)

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

Procedure: The title compound was prepared following the method of Example 14, using 1-hexynyllithium (64 mmol) prepared from 1-hexyne and n-butyl lithium in ethyl ether (64 mL) and phenyldiisopropoxyborane (11.96 g, 58 mmol) dissolved in ethyl ether (60 mL) and quenched with hydrogen chloride in ethyl ether (18.7 mL, 64 mmol). Yield. 11.2 g (86%), bp 102°-105° C. (0.4 mm Hg); n20D 1.5008; proton NMR (CDCl3)δ7.90 (m, 2H), 7.31 (m, 3H), 4.87 (septet, J=18 Hz, 1H), 2.33 (triplet, J=18 Hz, 2H), 1.23 (d, J=18 Hz, 6H), 0.90 (triplet, 3H); boro NMR (CDCl3)δ+36.5 ppm(s); mass spectrum (chemical ionization, isobutene) m/e 229 (M+H, 10%); IR (thin film) 2195, 1324 cm-1. Anal. Calcd. for C15H 21 BO: C, 78.97; H, 9.28. Found: C, 78.18; H, 9.27. Yield

Conditions: temp:100.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 0.23 g (0.2 mmol) of tetrakistriphenylphosphinepalladium is added under nitrogen to a solution of 2.93 g (9 mmol) of 2,2-dimethyl-5-trifluoromethylsulfonyloxy-4H-(1,3)benzodioxin-4-one in 50 ml of dimethylformamide, the mixture is stirred for a few minutes and 2.97 g (14 mmol) of potassium phosphate and 2.04 g (9.9 mmol) of diisopropyl phenylboronate are then added. The mixture is heated to 100° C. until conversion is complete (about 16 h). After cooling, the reaction solution is poured into a mixture of 250 ml of water and 6 g of orthophosphoric acid and extracted three times with methyl tert-butyl ether, and the combined organic phases are washed with water and saturated sodium chloride solution, dried over sodium sulfate and concentrated. 2.6 g of a dark oil remain, which is chromatographed on silica gel using toluene/acetone. 1.3 g (57%) of a colorless solid are obtained, m.p. 158°-163° C. (recrystallized from hexane). (about 16 h) After cooling extracted three times with methyl tert-butyl ether the combined organic phases are washed with water and saturated sodium chloride solution dried over sodium sulfate concentrated which is chromatographed on silica gel

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

Procedure: Following the procedure of Example 9, phenyllithium (17 mL, 30.6 mmol) and triisopropoxyborane (5.6 g, 30 mmol) were reacted, and the reaction quenched with acetyl chloride (2.1 mL, 30 mmol) to yield after distillation 5.2 g (25.2 mmol, 84%). were reacted to yield after distillation 5.2 g (25.2 mmol, 84%)

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