Coupling of Trifluoroacetaldehyde <i>N</i>-Triftosylhydrazone with Organoboronic Acids for the Synthesis of <i>gem</i>-Difluoroalkenes
作者:Yu Ma、Bhoomireddy Rajendra Prasad Reddy、Xihe Bi
DOI:10.1021/acs.orglett.9b03740
日期:2019.12.20
synthesis of alkyl gem-difluoroalkenes remains a difficult task in organic synthesis. Here, we report a general and efficient approach for tackling this problem by gem-difluoroolefination of trifluoroacetaldehyde N-triftosylhydrazone with organoboronic acids. This protocol is operationally simple, free of transition metals, and suitable for a broad range of organoboronic acids. Moreover, the utility
烷基宝石-二氟烯烃的合成在有机合成中仍然是一项艰巨的任务。在这里,我们报告了通过有机硼酸与三氟乙醛N-三氟甲yl的宝石二氟烯烃化反应来解决此问题的通用有效方法。该方案操作简单,不含过渡金属,适用于广泛的有机硼酸。此外,通过进一步转化宝石-二氟乙烯基,证明了产品的实用性。