Syntheses of C17–C27 fragments of 20-deoxybryostatins for assembly using Julia and metathesis reactions
作者:Matthew Ball、Thomas Gregson、Hiroki Omori、Eric J. Thomas
DOI:10.1039/c7ob00076f
日期:——
several steps to introduce alkynyl ester functionality, the stereoselective addition of a tributyltin cuprate followed by tributyltin–bromine exchange gave the required vinylic bromides. The palladium(0) catalysed couplings worked very well for enol esters containing thioether substituents and gave products with retention of the position and geometry of the trisubstituted double bond derived from the vinylic
Synthesis of the C(17)–C(27) fragment of the 20-deoxybryostatins
作者:Pedro Almendros、Alastair Rae、Eric J. Thomas
DOI:10.1016/s0040-4039(00)01697-x
日期:2000.12
A synthesis of the C(17)–C(27) fragment of the 20-deoxybryostatins is described in which the key step is a palladium(0) catalysed coupling of a tributyltin enolate with a vinylic bromide.