Torquoselective 6π-Electron Electrocyclic Ring Closure of 1-Azatrienes Containing Acyclic Chirality at the <i>C</i>-Terminus
作者:Nadiya Sydorenko、Richard P. Hsung、Eymi L. Vera
DOI:10.1021/ol060932t
日期:2006.6.1
Torquoselective pericyclic ring closures of 1-azatrienes that contain acyclic chirality at the C-terminus are described herein.
Highly Torquoselective Electrocyclizations and Competing 1,7-Hydrogen Shifts of 1-Azatrienes with Silyl Substitution at the Allylic Carbon
作者:Zhi-Xiong Ma、Ashay Patel、K. N. Houk、Richard P. Hsung
DOI:10.1021/acs.orglett.5b00727
日期:2015.5.1
Highly torquoselective electrocyclizations of chiral 1-azatienes are described. These 1-azatrienes,Contain an allylic stereocenter that is substituted with a silyl group and are derived in situ from condensation of gamma-silyl-substituted enals with vinylogous amides. The ensuing stereoselective ring closure are part of a tandem sequence that constitutes an aza-[3 + 3] aimulation method for constructing 1,2-dihydropyridines. several mechanisms:for the formal 1,7-hydrogen 'shift of these 1-azattienes vtiere evaluated computationally.