A Ba/Pd Catalytic System Enables Dehydrative Cross-Coupling and Excellent <i>E</i>-Selective Wittig Reactions
作者:Peizhong Xie、Weishan Fu、Xinying Cai、Zuolian Sun、Ying Wu、Shuangshuang Li、Cuiqing Gao、Xiaobo Yang、Teck-Peng Loh
DOI:10.1021/acs.orglett.9b02623
日期:2019.9.6
A Ba/Pd cooperative catalysis system was developed to enable the dehydrative cross-coupling of allylic alcohols with P-ylides to occur directly and promote a subsequent Wittig reaction in one pot. A variety of multisubstituted 1,4-dienes were isolated in good to excellent yields with broad P-ylides (stabilized by both ester and ketone carbonyl groups) and aldehyde (aliphatic and aromatic) substrates
开发了Ba / Pd协同催化系统,以使烯丙基醇与P-烷基的脱水交叉偶联直接发生,并促进一个罐中随后的Wittig反应。分离出多种多取代的1,4-二烯,具有良好的选择性,并具有宽E选择性的宽P-内酯(通过酯和酮羰基均稳定)和醛(脂族和芳族)底物。