High yielding allylation of a chiral secondary alcohol containing base sensitive functional groups
作者:James M. Kraus、Hunter C. Gits、Richard B. Silverman
DOI:10.1016/j.tetlet.2011.12.120
日期:2012.3
of selective inhibitors, but the method was limited at a key step of forming an allyl ether intermediate. Yields for this step were very inconsistent, and the presence of base sensitive functional groups limited the range of available methods for forming this ether bond. This work describes a novel application of palladium catalyzed decarboxylative allylation, consistently resulting in a 90% isolated
基于手性吡咯烷支架的神经元一氧化氮合酶抑制剂显示出治疗某些神经退行性疾病的希望。我们最近报道了一系列选择性抑制剂的合成,但该方法受限于形成烯丙基醚中间体的关键步骤。这一步的产率非常不一致,并且碱敏感官能团的存在限制了形成这种醚键的可用方法的范围。这项工作描述了钯催化脱羧烯丙基化的新应用,始终产生 90% 的分离产率,这对于合成这种关键的后期中间体至关重要。我们还报告了烯丙基-叔丁基碳酸酯前体的新的定量产率和直接合成。