Synthesis of the C(19)C(32) fragment of scytophycin C via stereospecific methylation of γ,δ-epoxy acrylates with trimethylaluminum
摘要:
The synthesis of the C(19) - C(32) fragment of Scytophycin C is described which features an iterative, stereospecific methylation of gamma,delta-epoxy acrylates by trimethylaluminum and the use of Roush's (S,S)-diisopropyltartrate-E-crotylboronate. (C) 1998 Elsevier Science Ltd. All rights reserved.
Synthetic studies on polypropionate antibiotics based on the stereospecific methylation of γ δ-epoxy acrylates by trimethylaluminum. A highly stereoselective construction of the eight contiguous chiral centers of ansa-chains of rifamycins
A highly stereoselective construction of the eight contiguous chiral centers of ansa-chains of rifamycins has been accomplished by the iterative use of the stereospecific methylation of γ,δ-epoxy acrylates by trimethylaluminum which was recently developed by us. The present work demonstrates the synthetic potential of the method for the synthesis of polypropionate antibiotics including ansamycins and