Methyl D-callipeltose 12 and D-callipeltose 4 were synthesized from D-glucal 5 in 10 and 11 steps, respectively. The synthesis features an azide displacement reaction of an alpha -nosyloxy ketone 7 and a highly diastereoselective C-methylation of alpha -azido ketone 8. (C) 2001 Elsevier Science Ltd. All rights reserved.
Methyl D-callipeltose 12 and D-callipeltose 4 were synthesized from D-glucal 5 in 10 and 11 steps, respectively. The synthesis features an azide displacement reaction of an alpha -nosyloxy ketone 7 and a highly diastereoselective C-methylation of alpha -azido ketone 8. (C) 2001 Elsevier Science Ltd. All rights reserved.