Y(OTf)3 catalyzed substitution dependent oxidative C(sp3)–C(sp3) cleavage and regioselective dehydration of β-allyl-β-hydroxydithioesters: alternate route to α,β-unsaturated ketones and functionalized dienes
摘要:
beta-Allyl-beta-hydroxydithioesters have been generated by the regioselective Grignard addition to the beta-oxodithioesters. They have been successfully employed in selective C(sp(3))-C(sp(3)) bond cleavage to construct alpha,beta-unsaturated ketone residues by the treatment of an emerging catalyst yttrium(III)triflate for the first time. On the other hand, hetaryl substituted beta-allyl-beta-hydroxydithioesters led to the useful diene precursors through selective dehydration under the similar conditions. (c) 2013 Elsevier Ltd. All rights reserved.
Magnesium-Promoted Reductive Carboxylation of Aryl Vinyl Ketones: Synthesis of γ-Keto Carboxylic Acids
作者:Suhua Zheng、Tianyuan Zhang、Hirofumi Maekawa
DOI:10.1021/acs.joc.2c00557
日期:2022.6.3
Direct reductive carboxylation of easily prepared aryl vinylketones under the atmosphere of carbon dioxide led to the selective formation of γ-keto carboxylic acids in 38–86% yields. The reaction is characterized by the carbon–carbon bond formation of carbon dioxide at the β-position of enone, with the use of magnesium turnings that can be easily handled as the reducing agent and the eco-friendly