P. Breuilles et D. Uguen, TOWARD A TOTAL SYNTHESIS OF PRISTINAMYCIN IIB - A CHIRON APPROACH TO A C-9 C-16 FRAGMENT/, Tetrahedron letters, 39(20), 1998, pp. 3145-3148
Copper(I)-catalysed addition of methyl Grignard reagent to the propagy
l diol 8, which was efficiently prepared from S-malic acid, proceeds w
ith a perfect E stereoselectivity, the diol thus obtained being then c
onvened into the title fragment by know methodology. (C) 1998 Publishe
d by Elsevier Science Ltd. All rights reserved.