作者:Gérard Gil、Elisée Ferre、Michel Barre、Jean Le Petit
DOI:10.1016/s0040-4039(00)82117-6
日期:1988.1
α-Allenic alcohols are reduced by into the corresponding β-ethylenic alcohols whereas β-allenic alcohols undergo an isomerization leading to their γ -acetylenic counterparts.
Photoexcited Palladium-Initiated Remote Desaturation of <i>N</i>-Alkoxypyridinium Salts
作者:Weiwei Jin、Shouyun Yu
DOI:10.1021/acs.joc.2c02036
日期:2022.11.4
1,5-Hydrogen atom transfer (HAT) is an effective strategy to achieve remote desaturation of nonfunctionalized alkanes. Herein, we report a photoinduced remote desaturation reaction of N-alkoxypyridinium salts, which serve as alkoxyl radical precursors. Mechanistic studies show that a single electrontransferbetween the excited palladium complex and a N-alkoxypyridinium salt initiates a radical chain
Substrate-Directed Enantioselective Aziridination of Alkenyl Alcohols Controlled by a Chiral Cation
作者:Alexander Fanourakis、Nicholas J. Hodson、Arthur R. Lit、Robert J. Phipps
DOI:10.1021/jacs.3c00693
日期:——
Alkeneaziridination is a highly versatile transformation for the construction of chiral nitrogen-containing compounds. Inspired by the success of analogous substrate-directed epoxidations, we report an enantioselective aziridination of alkenyl alcohols, which enables asymmetric nitrene transfer to alkenes with varied substitution patterns, including those not covered by the current protocols. We believe
Organic Dye Photocatalyzed Synthesis of Functionalized Lactones and Lactams via a Cyclization–Alkynylation Cascade
作者:Diana Cavalli、Jerome Waser
DOI:10.1021/acs.orglett.4c01078
日期:2024.5.24
accessible homoallylic cesium oxalates using ethynylbenziodoxolone (EBX) reagents has been developed. The reaction gave access to valuable functionalized lactones and lactams in up to 88% yield via the formation of two new C–C bonds. The transformation was carried out on primary, secondary, and tertiaryhomoallylicalcohols and primary homoallylic amines and could be applied to the synthesis of spirocyclic