作者:Yating Liang、Jiayi Feng、Huilong Li、Xiaoli Wang、Ying Zhang、Weigang Fan、Sheng Zhang、Man‐Bo Li
DOI:10.1002/anie.202400938
日期:2024.4.8
fuels the development of synthetic chemistry. Structurally well-defined [Co2O2] metallacycle complexes are developed as robust hydrogen evolution catalysts, unlocking the regioselective allene C(sp2)-H functionalization. A broad range of simple allenes are readily upgraded to synthetically useful allenols with unconventional chemoselectivity, high regioselectivity, good functional group tolerance, and
能源化学推动了合成化学的发展。结构明确的[Co 2 O 2 ]金属环配合物被开发为强大的析氢催化剂,解锁了区域选择性丙二烯C(sp 2 )-H功能化。多种简单的丙二烯很容易升级为合成有用的丙二烯醇,具有非常规的化学选择性、高区域选择性、良好的官能团耐受性和温和的条件。
CuBr2-mediated direct aqueous bromolactonization of 2,3-allenoates. An efficient access to β-bromobutenolides
作者:Shengming Ma、Shulin Wu
DOI:10.1016/s0040-4039(01)00634-7
日期:2001.6
An efficient procedure for the synthesis of beta -bromobutenolides was developed. 2,3-Allenoates with different substitution patterns react with CuBr2 in aqueous ethanol at 80-85 degreesC to afford the corresponding beta -bromobutenolides in moderate to excellent yields (up to 97%). (C) 2001 Elsevier Science Ltd. All rights reserved.