title: A controlled selective synthesis of dihydropyrans through tandem reaction of alkynes with diazo compounds.
abstract: We report here an effective protocol to prepare highly functionalized dihydropyrans via sequential reaction of cross-coupling-intramolecular Michael addition of functionalized terminal alkynes and diazo compounds under mild reaction conditions. Importantly, by choosing different ligands, the configuration of exocyclic double bonds of dihydropyrans can be selectively controlled.
authors.affiliation: Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, and School of Pharmaceutical Engineering & Life Science, Changzhou University, Changzhou 213164, P. R. China. jtsun@cczu.edu.cn jtsun08@gmail.com.
authors.forename: Junxiang
authors.initials: J
authors.lastname: Min
authors.forename: Guangyang
authors.initials: G
authors.lastname: Xu
authors.forename: Jiangtao
authors.initials: J
authors.lastname: Sun