title: Synthesis of α,α,α',α'-tetrachloro-Δ1-bipyrrolines and 4,8-dichloro-2,6-diazasemibuvallenes.
abstract: A series of 4,8-dichloro-2,6-diazasemibullvalenes were synthesized and isolated from the reaction of α,α,α',α'-tetrachloro-Δ(1)-bipyrrolines with lithium via C-N bond formation. All those dichlorodiazasemibullvalene derivatives demonstrated extremely rapid aza-Cope rearrangement in solution. An unprecedented skeletal rearrangement of 4,8-dichloro-2,6-diazasemibullvalene derivatives took place, resulting in the formation of a new bipyrroline skeleton.
authors: Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University , Beijing 100871, China.
authors: Ming
authors: M
authors: Zhan
authors: Shaoguang
authors: S
authors: Zhang
authors: Zhe
authors: Z
authors: Huang
authors: Zhenfeng
authors: Z
authors: Xi