New piperazinedione metabolites of Gliocladium deliquescens
作者:James R. Hanson、Margaret A. O'Leary
DOI:10.1039/p19810000218
日期:——
The phenol (3), its γγ-dimethylallyl ether (7), and bisdethiobis(methylthio)dehydrogliotoxin (10), together with the hydroxy-acid (13), have been isolated from Gliocladiumdeliquescens.
Sporidesmins. Part X. Synthesis of polysulphides by reaction of dihydrogen disulphide with disulphides and thiols
作者:S. Safe、A. Taylor
DOI:10.1039/j39700000432
日期:——
disulphide was slow. By contrast phenylmethanethiol reacted smoothly with the reagent to give di-, tri-, tetra-, and penta-sulphides, and this oxidation appears to be general. The epitrithiadioxopiperazines were light-sensitive and were converted photolytically into equimolecular mixtures of di-, and tetra-sulphides. By use of 35S-labelled polysulphides it was shown that the photolysed sulphur was that inserted
830. Sporidesmins. Part V. The stereochemistry of the bridged dioxopiperazine ring in sporidesmins and in gliotoxin
作者:H. Herrmann、R. Hodges、A. Taylor
DOI:10.1039/jr9640004315
日期:——
Johns, Nicholas; Kirby, Gordon W., Journal of the Chemical Society. Perkin transactions I, 1985, p. 1487 - 1490
作者:Johns, Nicholas、Kirby, Gordon W.
DOI:——
日期:——
Sporidesmins. Part XI. The reaction of triphenylphosphine with epipolythiodioxopiperazines
作者:S. Safe、A. Taylor
DOI:10.1039/j39710001189
日期:——
Dehydrogliotoxin and sporidesmin react with triphenylphosphine to give an epithiodioxopiperazine and triphenylphosphine sulphide. The reaction involves epimerization of the asymmetric centres of the dioxopiperazine ring. The epithiodioxopiperazines from sulphoxides when treated with peracids and these compounds are racemic. Evidence is presented, which suggests, that the reaction of sporidesmin E with triphenylphosphine