Synthetic Studies of Rifamycins. IV. The Synthesis of Rifamycin Ansa-chain Compound Using Carbohydrate

Article abstract of DOI:10.1246/bcsj.54.1749

3-O-Benzyl-2,4,7-trideoxy-5,6-O-isopropylidene-2,4-di-C-methyl-L-glycero-D-galacto-heptose (6) was synthesized through 16 steps from 4,6-O-benzylidene-3-deoxy-3-C-methyl-α-D-altropyranoside (7).The condensation of 6 with methyl 2,4,6,7-tetradeoxy-6-lithio