可見光氧化還原/鎳雙催化對映選擇性三組分烯烴芳基化反應的通用方法
作者:
小柯機器人發布時間:2020/11/21 21:03:07
該研究描述了一種可見光促進的、由光氧化還原和鎳雙催化的、發生在烯烴與叔烷基/仲烷基三氟硼酸鹽和芳基溴化物之間的對映選擇性三組分芳基化反應。該氧化還原中性的合成方法可以利用容易獲得的起始原料,以高收率和優異的對映選擇性輕鬆而多樣地獲得大量手性富集的β-烷基-α-芳基化羰基化合物、膦酸酯和碸。
研究人員還報導了氟比洛芬類似物和piragliatin先導化合物的模塊化和對映選擇性合成,以證明該合成方法的實用性。此外,團隊還通過實驗與計算化學研究,揭示了該反應的機理以及其化學和手性選擇性的來源。
附:英文原文
Title: General Method for Enantioselective Three-Component Carboarylation of Alkenes Enabled by Visible-Light Dual Photoredox/Nickel Catalysis
Author: Lei Guo, Mingbin Yuan, Yanyan Zhang, Fang Wang, Shengqing Zhu, Osvaldo Gutierrez, Lingling Chu
Issue&Volume: November 19, 2020
Abstract: A visible-light-promoted photoredox/nickel protocol for the enantioselective three-component carboarylation of alkenes with tertiary and secondary alkyltrifluoroborates and aryl bromides is described. This redox-neutral protocol allows for facile and divergent access to a wide array of enantioenriched β-alkyl-α-arylated carbonyls, phosphonates, and sulfones in high yields and excellent enantioselectivities from readily available starting materials. We also report a modular and enantioselective synthesis of flurbiprofen analogs and piragliatin lead compound to demonstrate synthetic utility. Experimental and computational mechanistic studies were performed to gain insights into the mechanism and origin of chemo- and enantioselectivity.
DOI: 10.1021/jacs.0c08823
Source: https://pubs.acs.org/doi/10.1021/jacs.0c08823