[3+2] Cycloaddition of Propargylic Alcohols and α‐Oxo Ketene Dithioacetals: Synthesis of Functionalized Cyclopentadienes and Further Application in a Diels–Alder Reaction
作者:Zhongxue Fang、Jianquan Liu、Qun Liu、Xihe Bi
DOI:10.1002/anie.201403014
日期:2014.7.7
organic synthesis and also ubiquitous as the Cp ligands in organometallic chemistry. As part of ongoing efforts to develop novel organic reactions that employ functionalized alkynes, a [3+2] cycloaddition of propargylic alcohols and ketene dithioacetals has been developed, which leads to fully substituted 2,5‐dialkylthio cyclopentadienes in good to excellent yields. In an unusual dethiolating Diels–Alder
环戊二烯是有机合成中有价值的中间体,并且在有机金属化学中也普遍用作Cp配体。作为开发使用官能化炔烃的新型有机反应的不断努力的一部分,已开发了[3 + 2]炔丙醇和乙烯酮二硫缩醛的环加成反应,从而可以完全取代2,5-二烷硫基环戊二烯,并具有良好的收率。在不寻常的脱硫Diels-Alder反应中,环戊二烯进一步与马来酰亚胺反应,得到了一系列新型的荧光多环化合物。