Three-Component Synthesis of N-Boc-4-iodopyrroles and Sequential One-Pot Alkynylation
摘要:
(Hetero)aryl-, alkenyl-, and selected alkyl-substituted acid chlorides can be efficiently coupled with N-Boc-protected propargylamine to produce ynones which are converted in a one-pot fashion to 2-substituted N-Boc-4-iodopyrroles. Upon addition of a further alkyne, another Sonogashira coupling can be carried out in a one-pot fashion. This sequentially Pd/Cu-catalyzed process represents a very mild and efficient entry to 2,4-disubstituted N-Boc-pyrroles.
Three-Component Synthesis of <i>N</i>-Boc-4-iodopyrroles and Sequential One-Pot Alkynylation
作者:Eugen Merkul、Christina Boersch、Walter Frank、Thomas J. J. Müller
DOI:10.1021/ol900581a
日期:2009.6.4
(Hetero)aryl-, alkenyl-, and selected alkyl-substituted acid chlorides can be efficiently coupled with N-Boc-protected propargylamine to produce ynones which are converted in a one-pot fashion to 2-substituted N-Boc-4-iodopyrroles. Upon addition of a further alkyne, another Sonogashira coupling can be carried out in a one-pot fashion. This sequentially Pd/Cu-catalyzed process represents a very mild and efficient entry to 2,4-disubstituted N-Boc-pyrroles.