A stereoselective synthesis of the C(1)–C(16) fragment of the bryostatins
作者:Matthew Ball、Anne Baron、Benjamin Bradshaw、Hiroki Omori、Somhairle MacCormick、Eric J. Thomas
DOI:10.1016/j.tetlet.2004.09.124
日期:2004.11
A synthesis of the C(1)–C(16) fragment of the brysostatins has been developed. Key steps are the stereoselective copper(I) catalysed addition of allylmagnesium bromide to an alkynyl ester, a condensation of a βγ-unsaturated aldehyde with a ketophosphonate, and the formation of the B-ring under mild conditions by stereoselective intramolecular conjugate addition.