Directed Zincation with TMPZnCl·LiCl and Further Functionalization of the Tropolone Scaffold
作者:Diana Haas、Daniela Sustac-Roman、Sophia Schwarz、Paul Knochel
DOI:10.1021/acs.orglett.6b03270
日期:2016.12.16
The directed zincation of tropolone derivatives was achieved using TMPZnCl·LiCl. Various functionalizations of the zincated intermediates by halogenation, acylation, allylation, and Negishi cross-coupling were successfully performed. Additionally, 1,8-conjugate addition–elimination reactions with a variety of arylmagnesium and secondary alkylzinc reagents were carried out to further elaborate the tropolone
使用TMPZnCl·LiCl可以实现托酚酮衍生物的直接锌化。通过卤化,酰化,烯丙基化和Negishi交叉偶联成功完成了锌化中间体的各种功能化。此外,还进行了与各种芳基镁和仲烷基锌试剂的1,8共轭加成消除反应,以进一步精制对酮的核心。