Stereoselective Synthesis of Difluorinated 1,3-Dienes via Palladium-Catalyzed C–F Bond Activation of Tetrasubstituted <i>gem</i>-Difluoroalkenes
作者:Yanhui Wang、Qiao Ma、Gavin Chit Tsui
DOI:10.1021/acs.orglett.1c01768
日期:2021.7.2
Pd(0)-catalyzed synthesis of difluorinated 1,3-dienes is described. Symmetrical 1,3-dienes containing a vicinal difluoro moiety can be obtained as single diastereomers from tetrasubstituted gem-difluoroalkenes. The reaction presumably proceeds through a stereoselective twofold Pd-catalyzed Miyaura borylation/Suzuki–Miyaura cross-coupling of the C–F bond. Moreover, modular synthesis of unsymmetrical
描述了高度非对映选择性 Pd(0)-催化合成二氟化 1,3-二烯。含有邻位二氟部分的对称 1,3-二烯可以作为单一非对映异构体从四取代的偕二氟烯烃中获得。该反应可能通过立体选择性双重 Pd 催化的 Miyaura 硼酸化/Suzuki-Miyaura 交叉偶联 C-F 键进行。此外,非对称的二氟化的1,3-二烯的模块化合成也是通过之间的耦合达到宝石-difluoroalkenes和borylated monofluoroalkenes。