Enantioselective Syntheses of Ring-C Precursors of Vitamin B12. Substrate Control. A Novel Si-Assisted Elimination of Vinyl Bromides
摘要:
[GRAPHICS]Homochiral ring-C precursors 34 of Vitamin B-12 have been prepared by Ireland-Claisen rearrangement of allyl esters 32, followed by a novel Si-assisted elimination of HBr.
Enantioselective Syntheses of Ring-C Precursors of Vitamin B12. Substrate Control. A Novel Si-Assisted Elimination of Vinyl Bromides
摘要:
[GRAPHICS]Homochiral ring-C precursors 34 of Vitamin B-12 have been prepared by Ireland-Claisen rearrangement of allyl esters 32, followed by a novel Si-assisted elimination of HBr.