Low-Valent Titanium-Mediated Stereoselective Alkylation of Allylic Alcohols
作者:Ivan L. Lysenko、Keunho Kim、Hyung Goo Lee、Jin Kun Cha
DOI:10.1021/ja806440m
日期:2008.11.26
reactions of acyclic and cyclic allylic alcohols for the stereoselective introduction of ethyl, 2-silylethyl, 2-phenethyl, and alkenyl groups. Cross-coupling of an allylic alcohol with a vinylsilane or styrene derivative is particularly noteworthy, as an efficient cross-selective coupling of two alkenes has been elusive. The stereochemistry of the cross-coupling alkylation is consistent with syn addit
Direct Allylic C(sp<sup>3</sup>)–H Thiolation with Disulfides via Visible Light Photoredox Catalysis
作者:Jungwon Kim、Byungjoon Kang、Soon Hyeok Hong
DOI:10.1021/acscatal.0c01232
日期:2020.6.5
direct allylic C(sp3)–H thiolation mediated by visiblelight photoredox catalysis. The use of in situ-generated thiylradical from disulfide as a hydrogen atom transfer (HAT) reagent and a coupling partner enabled selective cleavage of the allylic C(sp3)–H bond followed by C(sp3)–S bond formation. The undesired hydrothiolation, a prevalent reaction from facile thiylradical addition to olefins, was prevented