Water‐Promoted Dehydrative Tsuji–Trost Reaction of Non‐Derivatized Allylic Alcohols with Sulfinic Acids
作者:Jing Yu、Xueping Chang、Ruitian Ma、Qiuju Zhou、Mengmeng Wei、Xinhua Cao、Xiantao Ma
DOI:10.1002/ejoc.202001306
日期:2020.12.13
A promoting effect of water was observed, leading to the dehydrative synthesis of allylic sulfones byTsuji–Trost reaction of non‐derivatized allylic alcohols with sulfinicacids. Mechanism studies suggested the formation of the eight‐membered ring complex from allylic alcohols, sulfinicacids, and water through hydrogen bonding may be crucial to the efficient activation of allylic alcohols.
Synthesis of small ring-containing conjugated dienes via the coupling reaction of cyclopropyl- and cyclobutylmagnesium carbenoids with α-sulfonylallyllithiums
synthesized via the coupling reaction of cyclopropyl- and cyclobutylmagnesium carbenoids with α-sulfonylallyllithiums. Small ring cycloalkylmagnesium carbenoids were generated from aryl 1-chlorocycloalkyl sulfoxides and a Grignard reagent, and the resultant magnesium carbenoids were reacted with α-sulfonylallyllithiums, which were prepared via the deprotonation of p-tolyl vinyl sulfones or allyl p-tolyl
transition-metal-free HFIP-induced allylation reaction of tertiaryallylicalcohols with thiols or sulfonyl hydrazine derivatives was reported for the efficient and highly selective synthesis of allylic sulfides and allylic sulfones. Herein, HFIP played a vital role in not only activating the allylicalcohol, but also stabilizing the allylic cation intermediate to accelerate the subsequent transformations
the basis for a proposed radical-mediated mechanism. The metal-free procedure applies cheap and commercially available tetrabutylammonium tribromide as the catalyst and H2O as the solvent. Notable features of this simple, efficient, weakly toxic, and environmentallybenign strategy include mild and convenient operating conditions and readily accessible starting materials.