Regioselective Palladium-Catalyzed Synthesis of <i>β</i>-Arylated Primary Allylamine Equivalents by an Efficient Pd−N Coordination
作者:Kristofer Olofsson、Helena Sahlin、Mats Larhed、Anders Hallberg
DOI:10.1021/jo001416y
日期:2001.1.1
system, can be performed at the internal, beta-carbon of Boc- and phthalimido-protected allylamines, yielding arylated primary allylamine equivalents. The very high regioselectivity obtained with secondary Boc-protected allylamides is suggested to be caused by an efficient coordination between an anionic nitrogen and palladium. Single-mode microwave irradiation has been utilized to shorten the reaction
利用芳基三氟甲磺酸酯和钯/ dppf催化体系,可以在Boc和邻苯二甲酰亚胺基保护的烯丙胺的内部β-碳上进行高度区域选择性的Heck芳基化反应,生成芳基化的伯烯丙胺当量。建议用Boc保护的烯丙基仲胺获得很高的区域选择性,这是由于阴离子氮和钯之间的有效配位引起的。利用单模微波辐射可以缩短反应时间,并且在Boc保护的烯丙基酰胺的情况下,可以提高两种贫电子芳基三氟甲磺酸酯的收率。