Cascade C–H Annulation of Aldoximes with Alkynes Using O<sub>2</sub> as the Sole Oxidant: One-Pot Access to Multisubstituted Protoberberine Skeletons
作者:Junbin Tang、Shiqing Li、Zheng Liu、Yinsong Zhao、Zhijie She、Vilas D. Kadam、Ge Gao、Jingbo Lan、Jingsong You
DOI:10.1021/acs.orglett.6b03772
日期:2017.2.3
also achieved under slightly modified conditions. This protocol provides an efficient one-pot access to multisubstituted dehydroberberinium skeletons from simple starting materials, which can be easily transformed into berberinium and tetrahydroberberine skeletons by controlled hydrogenation.
在存在氧的Zn(OTf)2存在下,通过使用简单的[Cp * Rh(OAc)2 ] 2催化体系,开发了醛肟与炔烃的级联双CH环化反应以生产苯并[ a ] ac啶鎓盐。唯一的氧化剂。此外,在稍加修饰的条件下,醛基肟与炔烃,特别是芳基炔烃的CH环化反应也难以合成1 H-异喹啉。该协议提供了从简单的起始原料到多取代脱氢小in碱骨架的有效一锅通行方式,可以通过控制加氢将其轻松转化为小ber碱和四氢小ber碱骨架。