Reductive C–O, C–N, and C–S Cleavage by a Zirconium Catalyzed Hydrometalation/β-Elimination Approach
作者:Christof Matt、Frederic Kölblin、Jan Streuff
DOI:10.1021/acs.orglett.9b02572
日期:2019.9.6
A zirconium catalyzed reductive cleavage of Csp3 and Csp2 carbon-heteroatom bonds is reported that makes use of a tethered alkene functionality as a traceless directing group. The reaction is successfully demonstrated on C-O, C-N, and C-S bonds and proposed to proceed via a hydrozirconation/β-heteroatom elimination sequence of an in situ formed zirconium hydride catalyst. The positional isomerization
Homoallylic alcohols from (Z)-1,4-di(2-tetrahydropyranyloxy)-but-2-ene and Grignard reagents: a promising four-carbon homologation
作者:R. Menicagli、C. Malanga、B. Finato、L. Lardicci
DOI:10.1016/0040-4039(88)85165-7
日期:1988.1
In the presence of Nidppe, (Z)-1,4-di(2-tetrahydropyranyloxy)-but-2-ene undergoes allylic alkylation with Grignard reagents to give 2-alkylbut-3-enols in satisfactory yields.