Stereoselective synthesis of dibenzoxapine containing tetrasubstituted exocyclic alkenes via cascade methylboronic acid coupling reactions
作者:Hannah Yu、Rachel N. Richey、Javier Mendiola、Marta Adeva、Carmen Somoza、Scott A. May、Matthew W. Carson、Michael J. Coghlan
DOI:10.1016/j.tetlet.2008.01.099
日期:2008.3
A stereoselective method for the preparation of dibenzoxapine containing tetrasubstituted exocyclic E-alkenes has been developed. The key reaction involves an intramolecular cyclocarbopalladation of alkynes to form a vinylpalladium species and subsequently coupling the vinylpalladium with methylboronic acid. The approach provides a straightforward method for the synthesis of tetrasubstituted exocyclic