Highly Efficient Ligands for the Palladium-Assisted Double<i>N</i>-Arylation of Primary Amines for One-Sep Construction of Carbazoles
作者:Yibo Zhou、John G. Verkade
DOI:10.1002/adsc.200900846
日期:2010.3.8
highly efficient one‐pot synthesis of carbazoles via palladium‐catalyzed double N‐arylation of primary amines with 2,2′‐dihalobiphenyls is described using a catalyst system comprised of tris(dibenzylideneacetone)dipalladium(0) (Pd2dba3) and the proazaphosphatrane P(i‐BuNCH2CH2)3N (8) or its derivative (t‐Bu)2PNP(i‐BuNCH2CH2)3N (9a) as the ligand. The process is effective for double N‐arylation of 2
咔唑的A高效一锅合成通过钯-催化的双Ñ使用由三的催化剂系统被描述与2,2'- dihalobiphenyls伯胺的-arylation(苄基丙酮)二钯(0)(钯2 DBA 3)和所述proazaphosphatrane P(我-BuNCH 2 CH 2)3 N(8)或它的衍生物(叔丁基)2 PN P(异一束2 CH 2)3 N(图9a)作为配体。该过程对双氮有效2,2'-联苯二溴,二碘化物,甚至二氯化物与各种伯胺的芳基化反应,包括中性,富电子,电子不足和空间受阻的苯胺以及脂肪族胺。