Acetic Acid → 2-Tert-butoxycarbonyl-3-methoxycarbonylmethyl-2-(cis-2-pentenyl)-cyclopentanol

Participants

Reaction Steps

A 740 mg quantity of 5-tert-butoxycarbonyl-4-methoxycarbonylmethyl-5-(cis-2-pentenyl)-2-cyclopentenone (compound (2-b)) and 120 mg of sodium borohydride are dissolved in 100 ml of methanol, and the solution is refluxed for one hour. On completion of the reaction, 2 ml of acetic acid is added to the reaction mixture. The resulting mixture is concentrated in a vacuum. The residue is distilled in a vacuum, giving 2-tert-butoxycarbonyl-3-methoxycarbonylmethyl-2-(cis-2-pentenyl)-cyclopentanol (compound (1-b), R1 =t-Bu, R2 =CH3) in a yield of 98.5%, b.p. 75°-79° C./0.005 mm Hg.

Provenance & Evidence