1-(2-hydroxyethyl)cyclobutan-1-ol

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

Procedure: In an atmosphere of nitrogen, potassium tert-butoxide was added under ice-cooling to a mixture of cyclobutanone, ethyl chloroacetate and THF, spending 40 minutes, followed by stirring at 0° C. for 2 hours, raising the temperature to room temperature, and stirring at room temperature for 1 day, thereby obtaining ethyl 1-oxaspiro[2,3]hexane-2-carboxylate. A diethyl ether solution of the resulting ethyl 1-oxaspiro[2,3]hexane-2-carboxylate was added to a THF suspension of lithium aluminum hydride under ice-cooling in an atmosphere of nitrogen, followed by stirring at room temperature for 7 hours to obtain 1-(2-hydroxyethyl)cyclobutanol. A mixture of the resulting 1-(2-hydroxyethyl)cyclobutanol, 4-methylbenzenesulfonyl chloride, triethylamine and THF was stirred at room temperature for 16 hours to obtain 2-(1-hydroxycyclobutyl)ethyl 4-methylbenzenesulfonate.

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

Procedure: In an atmosphere of nitrogen, potassium tert-butoxide was added under ice-cooling to a mixture of cyclobutanone, ethyl chloroacetate and THF, spending 40 minutes, followed by stirring at 0° C. for 2 hours, raising the temperature to room temperature, and stirring at room temperature for 1 day, thereby obtaining ethyl 1-oxaspiro[2,3]hexane-2-carboxylate. A diethyl ether solution of the resulting ethyl 1-oxaspiro[2,3]hexane-2-carboxylate was added to a THF suspension of lithium aluminum hydride under ice-cooling in an atmosphere of nitrogen, followed by stirring at room temperature for 7 hours to obtain 1-(2-hydroxyethyl)cyclobutanol. A mixture of the resulting 1-(2-hydroxyethyl)cyclobutanol, 4-methylbenzenesulfonyl chloride, triethylamine and THF was stirred at room temperature for 16 hours to obtain 2-(1-hydroxycyclobutyl)ethyl 4-methylbenzenesulfonate.