Trivalent Organostibines: Sb,N Ligands in Double N-Arylation of Primary Amines toward Functionalized Carbazoles
作者:Lifen Peng、Yanting Zhao、Jiayi Chen、Hao Lu、Zilong Tang、Yi Chen、Shuang-Feng Yin、Nobuaki Kambe、Renhua Qiu
DOI:10.1021/acs.joc.3c01863
日期:2024.1.5
A Sb,N ligand (L-Sb) for Pd-catalyzed double N-arylation of primary amines was developed. This trivalent ligand L-Sb, containing a 5,6,7,12-tetrahydrodibenzo[c,f][1,5]azastibocine skeleton and stable under air and moisture, could be synthesized facilely on a gram scale from chlorostibine (1) and cyclopentylmagnesium bromide. L-Sb showed excellent catalytic performance in Pd2(dba)3-catalyzed double
开发了一种用于 Pd 催化伯胺双 N-芳基化的 Sb,N 配体 ( L-Sb )。这种三价配体L-Sb含有 5,6,7,12-四氢二苯并[ c , f ][1,5]氮杂替博辛骨架,在空气和湿气下稳定,可以从氯锑碱轻松合成克级 ( 1 )和环戊基溴化镁。 L-Sb在 Pd 2 (dba) 3催化的 2,2'-二溴-1,1'-联苯 ( 2 ) 与伯胺 ( 3 ) 的双 N-芳基化反应中表现出优异的催化性能,以良好的产率提供官能化咔唑。该Pd 2 (dba) 3 / L-Sb催化的双N-芳基化反应是三价有机锑化合物作为配体应用于N-芳基化反应的首例,具有催化剂负载量小、官能团耐受性广、化学稳定性好等优点。产率以及克级合成的简易性。