Synthesis of the penta-oxazole core of telomestatin in a convergent approach to poly-oxazole macrocycles
作者:Charles M. Marson、Mona Saadi
DOI:10.1039/b613791c
日期:——
A protocol for the construction of poly-oxazoles with consecutive 2,4′-linkages is described, and has afforded an efficient route to a penta-oxazole which demarcates a route to telomestatin and related macrocyclic poly-oxazole systems.
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