title: Nitrene equivalent mediated metal-free ring expansions of alkylidenecyclopropanes and an alkylidenecyclobutane.
abstract: The ring expansion of small-ring compounds provides a powerful method for the construction of various cyclic compounds. Herein, nitrene equivalent mediated metal-free ring expansions of alkylidenecyclopropanes (ACPs) and an alkylidenecyclobutane (ACB) were described. In this synthesis, a series of aryl-substituted cyclobutylidene and cyclopentylidene hydrazine derivatives were obtained under mild conditions in moderate to good yields. [reaction: see text]
authors.affiliation: Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, Beijing National Laboratory for Molecular Sciences, College of Chemistry, Peking University, Beijing 100871, China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Liang
authors.forename: Lei
authors.initials: L
authors.lastname: Jiao
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Wang
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Chen
authors.forename: Linge
authors.initials: L
authors.lastname: Ma
authors.forename: Jiaxi
authors.initials: J
authors.lastname: Xu
authors.forename: Shiwei
authors.initials: S
authors.lastname: Zhang
authors.forename: Zhi-Xiang
authors.initials: ZX
authors.lastname: Yu