A gold catalyzed formal intermolecular [2+3] cyclo-coupling of 1,3-enynes with phenols was developed to prepare dihydrobenzofuran derivatives with the addition of 2,6-dichloropyridine N-oxide, in which, a highly ortho-selective phenol SEAr functionalization was achieved by using 1,3-enynes as α-oxo vinyl gold carbenoid surrogates.
开发了金催化的 1,3-烯炔与苯酚的正式分子间 [2+3] 环偶联,通过添加 2,6-二氯吡啶N-氧化物制备二氢苯并呋喃衍生物,其中,高度邻位选择性的苯酚 S E Ar 官能化是通过使用 1,3-烯炔作为 α-氧代乙烯基金卡宾酸替代物来实现的。
Asymmetric Borylative Propargylation of Ketones Catalyzed by a Copper(I) Complex
作者:Xu-Cheng Gan、Liang Yin
DOI:10.1021/acs.orglett.8b03912
日期:2019.2.15
A copper(I)-catalyzed asymmetric borylative propargylation of simple ketones was disclosed. Additive NaBARF was found to be pivotal to achieve excellent enantioselectivity. This reaction enjoyed advantages of broad substrate scope, good tolerance of functional groups, high diastereo- and enantioselectivities, and reaction robustness. The borylative product served as a suitable cross-coupling partner
A radical-mediated 1,3,4-trifunctionalization cascade of 1,3-enynes with sulfinates and <i>tert</i>-butyl nitrite: facile access to sulfonyl isoxazoles
作者:Xin Yue、Ming Hu、Xingyi He、Shuang Wu、Jin-Heng Li
DOI:10.1039/d0cc01659d
日期:——
indium-promoted three-component 1,3,4-trifunctionalization cascade of 1,3-enynes with sodium sulfinates and tert-butyl nitrite (TBN) to access 5-sulfonylisoxazoles via [3+2] annulation is reported. By employing TBN as both the radical initiator and the N–O two atom unit, this method enables the formation of three new carbon–heteroatom bonds, C–S, C–N and C–Obonds, in a single reactionthrough a sequence
The palladium-catalyzed oxidative [3+2] cycloaddition of ketoimines with alkynes provided an efficient access to multisubstituted pyrroles via Csp3–H activation.
A three-component radical coupling reaction of aryl alkenes or 1,3-enynes with tert-butyl hydroperoxide and formamides for the efficient synthesis of β-peroxy amides.