[EN] HYDRAZIDE CONTAINING NUCLEAR TRANSPORT MODULATORS AND USES THEREOF [FR] MODULATEURS DE TRANSPORT NUCLÉAIRE CONTENANT DE L'HYDRAZIDE ET LEURS UTILISATIONS
Gold-Catalyzed Asymmetric Thioallylation of Propiolates via Charge-Induced Thio-Claisen Rearrangement
作者:Hanbyul Kim、Jiwon Jang、Seunghoon Shin
DOI:10.1021/jacs.0c09783
日期:2020.12.9
A gold(I)-catalyzedenantioselective thioallylation of propiolates with allyl sulfides is described. The key mechanistic element is a sulfonium-induced Claisenrearrangement which helps minimize the allyl dissociation and render higher enantioselectivity. This protocol features remarkable scope of the allyl moiety, allowing enantiocontrolled synthesis of all-carbon quaternary centers, and exhibits
Regioselective and stereoselective sulfonylation of alkynylcarbonyl compounds in water
作者:Wenyi Li、Guoxing Yin、Lei Huang、Yan Xiao、Zhimin Fu、Xiu Xin、Fang Liu、Zhizhang Li、Weimin He
DOI:10.1039/c6gc01196a
日期:——
A simple and efficient route for the synthesis of Z-[small beta]-sulfonyl-[small alpha],[small beta]-unsaturated carbonylcompounds by using water as the solvent and hydrogen source is developed.
Functionalisation of cycloalkanes: the photomediated reaction of cycloalkanes with alkynes
作者:Niall W.A Geraghty、John J Hannan
DOI:10.1016/s0040-4039(01)00390-2
日期:2001.4
Using a standard mercury vapour lamp or sunlight, and in the presence of a soluble or polymer-bound photomediator such as benzophenone, cycloalkanes can be functionalised by insertion of alkynes containing electron-withdrawing groups into a CH bond.
Organocatalytic
<i>trans</i>
Phosphinoboration of Internal Alkynes
作者:Russell G. Fritzemeier、Jan Nekvinda、Christopher M. Vogels、Carol Ann Rosenblum、Carla Slebodnick、Stephen A. Westcott、Webster L. Santos
DOI:10.1002/anie.202006096
日期:2020.8.17
We report the first trans phosphinoboration of internal alkynes. With an organophosphine catalyst, alkynoate esters and the phosphinoboronate Ph2P‐Bpin are efficiently converted into the corresponding trans‐α‐phosphino‐β‐boryl acrylate products in moderate to good yield with high regio‐ and Z‐selectivity. This reaction operates under mild conditions and demonstrates good atom economy, requiring only
Phosphine-catalyzed sequential (2+3)/(2+4) annulation of γ-vinyl allenoates: access to the synthesis of chromeno[4,3-<i>b</i>]pyrroles
作者:Xiaohu Li、You Huang
DOI:10.1039/d1cc04199a
日期:——
A phosphine-catalyzed cascade (2+3)/(2+4) cyclization reaction of γ-vinyl allenoates with aldimine esters has been developed to provide a series of chromeno[4,3-b]pyrrole derivatives that contain three contiguous stereogenic centers. The method gives a good yield, excellent chemoselectivity and diastereoselectivity under mild conditions.
已开发出膦催化的 γ-烯丙酸乙烯酯与醛亚胺酯的级联 (2+3)/(2+4) 环化反应,以提供一系列包含三个连续立体中心的色基[4,3- b ] 吡咯衍生物. 该方法在温和条件下具有良好的收率、优异的化学选择性和非对映选择性。