Gold-Catalyzed Synthesis of Diaza-hexatrienes Via Diazo Attack at Vinylgold Carbenes: An Easy Access to 1<i>H</i>-Pyrazolo[4,3-<i>b</i>]pyridine-5-ones
作者:Vikas Ashokrao Sadaphal、Rai-Shung Liu
DOI:10.1021/acs.orglett.1c01835
日期:2021.7.16
This work reports a gold-catalyzed stereoselective synthesis of highly substituted E-configured 2,3-diaza-1,3,5-hexatrienes using α-diazo nitriles and cyclopropene derivatives; such products arise from an atypical diazo attack of α-aryldiazo nitriles at vinylgold carbenes. For these 2,3-diaza-1,3,5-hexatrienes, we develop a novel anionic cyclization of derivatives of one family to form 1H-pyrazolo[4
这项工作报告了使用 α-重氮腈和环丙烯衍生物的金催化立体选择性合成高度取代的E-构型 2,3-二氮杂-1,3,5-己三烯;此类产物来自 α-芳基重氮腈对乙烯基金卡宾的非典型重氮攻击。对于这些 2,3-二氮杂-1,3,5-己三烯,我们开发了一种新的阴离子环化方法,将一个家族的衍生物环化形成 1 H-吡唑并[4,3 - b ]吡啶-5-酮。