Direct Room-Temperature Lactonisation of Alcohols and Ethers onto Amides: An “Amide Strategy” for Synthesis
作者:Viviana Valerio、Desislava Petkova、Claire Madelaine、Nuno Maulide
DOI:10.1002/chem.201203906
日期:2013.2.18
Last‐minute deal: A direct lactonisation of ethers and alcohols onto amides that proceeds at room temperature under mild conditions is reported (see scheme). This allows the effective saving of up to two unproductive, sequential deprotection operations in synthetic sequences. Mechanistic studies are described, and a new “amide strategy” that exploits the dual robustness/late‐stage selective activation
最后一分钟的交易:据报道,醚和醇在酰胺的直接内酯化反应在室温下,在温和条件下进行(见方案)。这允许在合成序列中有效节省多达两个非生产性的顺序脱保护操作。描述了机理研究,并概述了利用该官能团的双重鲁棒性/后期选择性激活特性的新“酰胺策略”。