Synthesis of the α,β-Unsaturated δ-Lactones (+)-Anhydrocalopin and (+)-Dehydrocalopin
作者:Wolfgang Steglich、Heiner Ebel、Kirsten Zeitler
DOI:10.1055/s-2003-36269
日期:——
During our investigations on the calopin group of mushroom metabolites, a synthesis of 3,4-disubstituted α,β-unsaturated δ-lactones has been developed. It was applied to the synthesis of optically active dehydrocalopin (2) and anhydrocalopin (3).
Use of Allylic Strain To Enforce Stereochemistry. Direct Syntheses of 7,8-Dihydroxycalamenene and Mansonone C
作者:George A. Kraus、Insik Jeon
DOI:10.1021/ol0621194
日期:2006.11.9
[GRAPHICS]Direct syntheses of 7,8-dihydroxycalamenene and mansonone C were achieved. The cis-stereochemistry required for the synthesis of 7,8-dihydroxycalamenene was introduced by an intramolecular cyclization directed by allylic strain.
Total synthesis of the mushroom metabolite (+)-calopin
作者:Heiner Ebel、Sebastian Knör、Wolfgang Steglich
DOI:10.1016/s0040-4020(02)01451-5
日期:2003.1
A synthesis of (+)-calopin (1a) was achieved employing a highly stereoselective ene reaction between 8-phenylmenthyl glyoxylate (3) and the β,β-dimethylstyrene 4c. Transesterification of the resulting homoallylic alcohol 5c, followed by allylic oxidation and hydrogenation yielded the δ-lactone 13 which was deprotected to the natural product 1a.