Visible-Light-Mediated Oxidative Dimerization of Arylalkynes in the Open Air: Stereoselective Synthesis of (<i>Z</i>)-1,4-Enediones
作者:Donglei Wei、Fushun Liang
DOI:10.1021/acs.orglett.6b02926
日期:2016.11.18
An organic photoredox catalytic one-pot protocol is developed for the highly stereoselective synthesis of (Z)-1,4-enediones. The reaction starts directly from alkyne precursors, using 4-(4-cyanophenyl)-2,6-diphenylpyrylium tetrafluoroborate (CN-TPT) as an efficient photosensitizer and dioxygen in the air as a green oxidant. A Csp–Csp oxidative coupling/[4 + 2] cyclization (with dioxygen)/fragmentive
Synthesis of (<i>E</i>)-1,4-Enediones from α-Halo Ketones Through a Sodium Sulfinate Mediated Reaction
作者:Su-Yi Li、Xiao-Bing Wang、Neng Jiang、Ling-Yi Kong
DOI:10.1002/ejoc.201403236
日期:2014.12
We developed a mild and practical protocol for the synthesis of 1,4-enedione from α-haloketones through a sodium sulfinate mediated reaction. This reaction enables the construction of symmetric and unsymmetric 1,4-enedione with complete E selectivity. Sodium 4-toluenesulfinate plays an important role in this reaction.
我们开发了一种温和实用的方案,用于通过亚磺酸钠介导的反应从 α-卤代酮合成 1,4-烯二酮。该反应能够构建具有完全 E 选择性的对称和非对称 1,4-烯二酮。4-甲苯亚磺酸钠在该反应中起重要作用。