Baker's yeast reduction of 3-phenylthiomethyl-2-butenolide and its derivatives: Synthesis of versatile chiral C5-building blocks for terpenoid synthesis
摘要:
Bakers' yeast reduction of 3-phenylthiomethyl-2-butenolide gave (R)-3-phenylthiomethylbutanolide ( 99% e.e.), a versatile chiral C5-building block for terpenoid synthesis.
Electroreductive cyclization reactions: Attempts to use 2(5h)furanones (α,β-unsaturated butenolides). Dominance of acid-base over cyclization chemistry
作者:Mary A. Amputch、R.Daniel Little
DOI:10.1016/s0040-4020(01)90497-1
日期:1991.1
butenolides as substrates in the electroreductivecyclizationreaction has been investigated. A variety of butenolides bearing either an α,β,-unsaturated ester, an α,β,δ,-unsaturated ester, allylic bromide, bromide, mesylate or aldehyde functionality on the appending side chain have been examined. The performance of each of these systems under electroreductivecyclizationreaction conditions is severely limited