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.
Synthesis of Furocoumarins via Rhodium(II)-Catalysed Heterocyclisation of 3-Diazobenzobyran-2,4-(3H)-dione with Terminal Alkynes
GIOVENZANA, Giovanni Battista;
2001-01-01
Abstract
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.File in questo prodotto:
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