Novel polyoxazole-based cyclopeptides from Streptomyces sp. Total synthesis of the cyclopeptide YM-216391 and synthetic studies towards telomestatin
作者:Jon Deeley、Anna Bertram、Gerald Pattenden
DOI:10.1039/b802477d
日期:——
hepta-oxazole 30en route to telomestatin 1. Likewise, neither the hexa-oxazole 47 or application of an intramolecular Hantzsch oxazole ring-forming reaction from 44b allowed access to the advanced polyoxazole-macrolactam intermediates 48 and 30a, respectively, towards telomestatin. Combination of the tris-oxazole based methylamine 70 with the dipeptide carboxylic acid 71 derived from D-valine and L-isoleucine