The absolute configuration of polycephalin C from the slime mold Physarum polycephalum (Myxomycetes)
作者:Florian Blumenthal、Kurt Polborn、Bert Steffan
DOI:10.1016/s0040-4020(02)01051-7
日期:2002.10
The absolute configuration of polycephalin C (1) isolated from plasmodia of the slime mold Physarum polycephalum is supposed to be 3″R,4″R as found by comparison of CD spectra of the naturalproduct polycephalin C (1) and CD spectra of synthetic bis-benzoates (−)-4 and (+)-4. An X-ray structure of the corresponding bis-camphanate (+)-3 shows that the excitonchiralitymethod may not be applied on these
作者:Gerhard Schlingmann、Stefan Matile、Nina Berova、Koji Nakanishi、Guy T. Carter
DOI:10.1016/0040-4020(95)00923-x
日期:1996.1
The exciton coupled CD method has been applied to determine the absoluteconfiguration of the diepoxins, spiroketal-linked naphthodiepoxydecalinones of fungal origin. The CDspectra of the bis-dimethylaminobenzoate derivatives of the diepoxins η, ι and κ, reveal a positive chiral twist between the two substituted hydroxyl groups and thus infer theS configuration at both of these stereogenic centers