Efficient MnIII-mediated synthesis of functionalized trans-3,4-disubstituted-γ-butyrolactones
摘要:
The Mn-III-induced addition of malonic acid (instead of acetic acid) to cinnamic esters affords in one step functionalized trans-3,4-disubbtituted-gamma-butyrolactones in a greatly improved yield which can be further optimized by conducting the reaction in either acetic or formic acid, depending on the substrate. (C) 2002 Elsevier Science Ltd. All rights reserved.