G. Oddon et al., TOWARD A TOTAL SYNTHESIS OF AN AGLYCONE OF SPIRAMYCIN - INSTALLATION OF THE HYDROXY-GROUPS AT C-4 AND C-5 - A MODEL STUDY, Tetrahedron letters, 39(10), 1998, pp. 1149-1152
The stereochemical course of the osmium-mediated bis-hydroxylation of
the allylic derivative 6c, whose the structure is closely related to t
hat of a C-1/C-7 fragment of the title aglycone, has been established
unambiguously by X-ray analysis of a carboxylic acid derived from one
of the two diastereomeric dials which formed. (C) 1998 Published by El
sevier Science Ltd. All rights reserved.