Synthesis of α-vinylidene-β-lactams by the palladium-catalyzed carbonylation of 4-amino-2-alkynyl carbonates
作者:Tadakatsu Mandai、Kazuo Ryoden、Mikio Kawada、Jiro Tsuji
DOI:10.1016/0040-4039(91)80564-m
日期:1991.12
The palladium-catallyzed carbonylation of 4-amino-2-alkynyl carbonates proceeded under mild conditions to afford α-vinylidene-β-lactams in moderate yields. The cyclic phosphite, 4-ethyl-2,6,7-trioxa-1-phosphabicyclo[2.2.2]octane was found to be the best ligand.
4-氨基-2-炔基碳酸酯的钯催化羰基化反应在温和的条件下进行,以中等收率得到α-亚乙烯基-β-内酰胺。发现环状亚磷酸酯,4-乙基-2,6,7-三氧杂-1-磷酸双环[2.2.2]辛烷是最好的配体。