Synthesis of Furocoumarins via Rhodium(II)-Catalysed Heterocyclisation of 3-Diazobenzopyran-2,4-(3H)-dione with Terminal Alkynes
作者:Stefano Tollari、Giovanni Palmisano、Sergio Cenini、Giancarlo Cravotto、Giovanni B. Giovenzana、Andrea Penoni
DOI:10.1055/s-2001-12765
日期:——
The rhodium (II) acetate-catalysed decomposition of 3-diazobenzopyran-2,4(3H)-dione in the presence of a terminal alkyne gave rise to a mixture of isomeric 2-substituted furo[3,2-c]coumarin and furo[2,3-b]coumarin, resulting from a formal [3+2] cycloaddition.
在末端炔存在下,乙酸铑 (II) 催化分解 3-重氮苯并吡喃-2,4(3H)-二酮,生成异构体 2-取代呋喃并[3,2-c]香豆素和呋喃的混合物[2,3-b]香豆素,由正式的[3+2]环加成反应产生。