Intramolecular Alkene Electrophilic Bromination Initiated ipso-Bromocyclization for the Synthesis of Functionalized Azaspirocyclohexadienones
摘要:
Intramolecular alkene electrophilic bromination initiated dearomative cyclization has been realized in the presence of DBDMH to provide functionalized azaspirocyclohexadienones in excellent yields under mild conditions.
Switching the<i>N</i>-Alkylation of Arylamines with Benzyl Alcohols to Imine Formation Enables the One-Pot Synthesis of Enantioenriched α-<i>N</i>-Alkylaminophosphonates
作者:Natalie Hofmann、Kai C. Hultzsch
DOI:10.1002/ejoc.201900209
日期:2019.6.2
The base‐free N‐alkylation of anilines with benzylic alcohols can be switched in favor of imine formation simply by switching between a closed and an open reaction system. Further functionalization of the in situ synthesized imine leads to α‐N‐alkylaminophosphonates via a one‐pot procedure in an atom‐economic fashion.
A versatile and highly stereoselective borylative cyclization to generate polyfunctionalized γ-lactams has been developed. The stereoselective synthesis of these key ring systems is crucial due to their ubiquity in natural products. We report the diastero- and enantioselective construction of di- and trisubstituted γ-lactam cores, with examples containing an enantioenriched quaternary carbon.
Intramolecular Alkene Electrophilic Bromination Initiated <i>ipso</i>-Bromocyclization for the Synthesis of Functionalized Azaspirocyclohexadienones
作者:Qin Yin、Shu-Li You
DOI:10.1021/ol301531z
日期:2012.7.6
Intramolecular alkene electrophilic bromination initiated dearomative cyclization has been realized in the presence of DBDMH to provide functionalized azaspirocyclohexadienones in excellent yields under mild conditions.