tert-butyl 2-(3-hydroxyphenyl)acetate

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

Procedure: A solution of spiro[2H-1-benzopyran-2,1′-cyclopropane]-6-carboxylic acid, 8-cyclopropyl-3,4-dihydro-4,4-dimethyl- (Intermediate 49, 0.05 g, 0.18 mmol) in anhydrous dichloromethane (5 mL) was treated with tert-butyl-3-hydroxy phenyl acetate (Reagent F, 0.04 g, 0.18 mmol) followed by 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (0.029 g, 0.1 mmol) and 4-dimethylaminopyridine (0.022 g, 0.18 mmol). The resulting solution was stirred at ambient temperature overnight. The reaction mixture was subjected to flash column chromatography over silica gel (230-400 mesh) using 7% ethyl acetate in hexane as the eluent to afford the title compound as a clear oil that solidified on standing (0.020 g, 23%).

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

Procedure: A solution of spiro[2H-1-benzopyran-2,1′-cyclopropane]-6-carboxylic acid, 8-cyclopropyl-3,4-dihydro-4,4-dimethyl- (Intermediate 49, 0.05 g, 0.18 mmol) in anhydrous dichloromethane (5 mL) was treated with tert-butyl-3-hydroxy phenyl acetate (Reagent F, 0.04 g, 0.18 mmol) followed by 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (0.029 g, 0.1 mmol) and 4-dimethylaminopyridine (0.022 g, 0.18 mmol). The resulting solution was stirred at ambient temperature overnight. The reaction mixture was subjected to flash column chromatography over silica gel (230-400 mesh) using 7% ethyl acetate in hexane as the eluent to afford the title compound as a clear oil that solidified on standing (0.020 g, 23%).

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

Procedure: A solution of spiro[2H-1-benzopyran-2,1′-cyclopropane]-6-carboxylic acid, 8-cyclopropyl-3,4-dihydro-4,4-dimethyl-(Intermediate 49, 0.05 g, 0.18 mmol) in anhydrous dichloromethane (5 mL) was treated with tert-butyl-3-hydroxy phenyl acetate (Reagent F, 0.04 g, 0.18 mmol) followed by 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (0.029 g, 0.1 mmol) and 4-dimethylaminopyridine (0.022 g, 0.18 mmol). The resulting solution was stirred at ambient temperature overnight. The reaction mixture was subjected to flash column chromatography over silica gel (230-400 mesh) using 7% ethyl acetate in hexane as the eluent to afford the title compound as a clear oil that solidified on standing (0.020 g, 23%).

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

Procedure: A solution of spiro[2H-1-benzopyran-2,1′-cyclopropane]-6-carboxylic acid, 8-cyclopropyl-3,4-dihydro-4,4-dimethyl- (Intermediate 49, 0.05 g, 0.18 mmol) in anhydrous dichloromethane (5 mL) was treated with tert-butyl-3-hydroxy phenyl acetate (Reagent F, 0.04 g, 0.18 mmol) followed by 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (0.029 g, 0.1 mmol) and 4-dimethylaminopyridine (0.022 g, 0.18 mmol). The resulting solution was stirred at ambient temperature overnight. The reaction mixture was subjected to flash column chromatography over silica gel (230-400 mesh) using 7% ethyl acetate in hexane as the eluent to afford the title compound as a clear oil that solidified on standing (0.020 g, 23%).

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

Procedure: A solution of spiro[2H-1-benzopyran-2,1′-cyclopropane]-6-carboxylic acid, 8-cyclopropyl-3,4-dihydro-4,4-dimethyl-(Intermediate 49, 0.05 g, 0.18 mmol) in anhydrous dichloromethane (5 mL) was treated with tert-butyl-3-hydroxy phenyl acetate (Reagent F, 0.04 g, 0.18 mmol) followed by 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (0.029 g, 0.1 mmol) and 4-dimethylaminopyridine (0.022 g, 0.18 mmol). The resulting solution was stirred at ambient temperature overnight. The reaction mixture was subjected to flash column chromatography over silica gel (230-400 mesh) using 7% ethyl acetate in hexane as the eluent to afford the title compound as a clear oil that solidified on standing (0.020 g, 23%).

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

Procedure: A solution of spiro[2H-1-benzopyran-2,1′-cyclopropane]-6-carboxylic acid, 8-cyclopropyl-3,4-dihydro-4,4-dimethyl- (Intermediate 49, 0.05 g, 0.18 mmol) in anhydrous dichloromethane (5 mL) was treated with tert-butyl-3-hydroxy phenyl acetate (Reagent F, 0.04 g, 0.18 mmol) followed by 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (0.029 g, 0.1 mmol) and 4-dimethylaminopyridine (0.022 g, 0.18 mmol). The resulting solution was stirred at ambient temperature overnight. The reaction mixture was subjected to flash column chromatography over silica gel (230-400 mesh) using 7% ethyl acetate in hexane as the eluent to afford the title compound as a clear oil that solidified on standing (0.020 g, 23%).

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

Procedure: A solution of spiro[2H-1-benzopyran-2,1′-cyclopropane]-6-carboxylic acid, 8-cyclopropyl-3,4-dihydro-4,4-dimethyl-(Intermediate 49, 0.05 g, 0.18 mmol) in anhydrous dichloromethane (5 mL) was treated with tert-butyl-3-hydroxy phenyl acetate (Reagent F, 0.04 g, 0.18 mmol) followed by 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (0.029 g, 0.1 mmol) and 4-dimethylaminopyridine (0.022 g, 0.18 mmol). The resulting solution was stirred at ambient temperature overnight. The reaction mixture was subjected to flash column chromatography over silica gel (230-400 mesh) using 7% ethyl acetate in hexane as the eluent to afford the title compound as a clear oil that solidified on standing (0.020 g, 23%).

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

Procedure: A solution of spiro[2H-1-benzopyran-2,1′-cyclopropane]-6-carboxylic acid, 8-cyclopropyl-3,4-dihydro-4,4-dimethyl- (Intermediate 49, 0.05 g, 0.1 8 mmol) in anhydrous dichloromethane (5 mL) was treated with tert-butyl-3-hydroxy phenyl acetate (Reagent F, 0.04 g, 0.18 mmol) followed by 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (0.029 g, 0.1 mmol) and 4-dimethylaminopyridine (0.022 g, 0.18 mmol). The resulting solution was stirred at ambient temperature overnight. The reaction mixture was subjected to flash column chromatography over silica gel (230-400 mesh) using 7% ethyl acetate in hexane as the eluent to afford the title compound as a clear oil that solidified on standing (0.020 g, 23%).

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

Procedure: A solution of spiro[2H-1-benzopyran-2,1′-cyclopropane]-6-carboxylic acid, 8-cyclopropyl-3,4-dihydro-4,4-dimethyl-(Intermediate 49, 0.05 g, 0.18 mmol) in anhydrous dichloromethane (5 mL) was treated with tert-butyl-3-hydroxy phenyl acetate (Reagent F, 0.04 g, 0.18 mmol) followed by 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (0.029 g, 0.1 mmol) and 4-dimethylaminopyridine (0.022 g, 0.18 mmol). The resulting solution was stirred at ambient temperature overnight. The reaction mixture was subjected to flash column chromatography over silica gel (230-400 mesh) using 7% ethyl acetate in hexane as the eluent to afford the title compound as a clear oil that solidified on standing (0.020 g, 23%).

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

Procedure: A solution of spiro[2H-1-benzopyran-2,1′-cyclopropane]-6-carboxylic acid, 8-cyclopropyl-3,4-dihydro-4,4-dimethyl- (Intermediate 49, 0.05 g, 0.18 mmol) in anhydrous dichloromethane (5 mL) was treated with tert-butyl-3-hydroxy phenyl acetate (Reagent F, 0.04 g, 0.18 mmol) followed by 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (0.029 g, 0.1 mmol) and 4-dimethylaminopyridine (0.022 g, 0.18 mmol). The resulting solution was stirred at ambient temperature overnight. The reaction mixture was subjected to flash column chromatography over silica gel (230-400 mesh) using 7% ethyl acetate in hexane as the eluent to afford the title compound as a clear oil that solidified on standing (0.020 g, 23%).

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

Procedure: A solution of spiro[2H-1-benzopyran-2,1′-cyclopropane]-6-carboxylic acid, 8-cyclopropyl-3,4-dihydro-4,4-dimethyl- (Intermediate 49, 0.05 g, 0.18 mmol) in anhydrous dichloromethane (5 mL) was treated with tert-butyl-3-hydroxy phenyl acetate (Reagent F, 0.04 g, 0.18 mmol) followed by 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (0.029 g, 0.1 mmol) and 4-dimethylaminopyridine (0.022 g, 0.18 mmol). The resulting solution was stirred at ambient temperature overnight. The reaction mixture was subjected to flash column chromatography over silica gel (230-400 mesh) using 7% ethyl acetate in hexane as the eluent to afford the title compound as a clear oil that solidified on standing (0.020 g, 23%).

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

Procedure: A solution of spiro[2H-1-benzopyran-2,1′-cyclopropane]-6-carboxylic acid, 8-cyclopropyl-3,4-dihydro-4,4-dimethyl-(Intermediate 49, 0.05 g, 0.18 mmol) in anhydrous dichloromethane (5 mL) was treated with tert-butyl-3-hydroxy phenyl acetate (Reagent F, 0.04 g, 0.18 mmol) followed by 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (0.029 g, 0.1 mmol) and 4-dimethylaminopyridine (0.022 g, 0.18 mmol). The resulting solution was stirred at ambient temperature overnight. The reaction mixture was subjected to flash column chromatography over silica gel (230-400 mesh) using 7% ethyl acetate in hexane as the eluent to afford the title compound as a clear oil that solidified on standing (0.020 g, 23%).