| 中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
|---|---|---|---|---|
| —— | [(1aS,2S,3aR,5R,7S,7aR,7bS)-1a-[3-[tert-butyl(dimethyl)silyl]oxyprop-1-en-2-yl]-7,7a-dimethyl-2-triethylsilyloxy-2,3,3a,4,5,6,7,7b-octahydronaphtho[1,2-b]oxiren-5-yl]oxy-triethylsilane | 934968-69-1 | C33H66O4Si3 | 611.141 |
| —— | (1S,2S,3aS,5R,7S,7aR)-2-[3-[tert-butyl(dimethyl)silyl]oxyprop-1-en-2-yl]-1,5-dihydroxy-7,7a-dimethyl-3,3a,4,5,6,7-hexahydro-1H-indene-2-carbaldehyde | 934968-70-4 | C21H38O4Si | 382.616 |
Peribysins belong to a family of eremophilanes isolated from marine Periconia byssoides OUPS-N133 and terrestrial P. macrospinosa KT3863. Their absolute configurations were determined to be the (4S)-enantiomers based on the modified Mosher’s method, chemical derivatizations, density functional theory (DFT)-based electronic circular dichroism (ECD) spectral analysis, and DFT-based [α]D calculations. Danishefsky’s and Reddy’s total syntheses assigned the (4R)-forms for the marine peribysins despite agreeing with the (4S)-configuration for the terrestrial peribysin Q (5). This paper reports the successful solution of this chirality confusion of peribysins by reproducing the ECD spectrum of peribysin G bis(p-bromobenzoate) prepared from peribysin A (1) isolated from terrestrial P. byssoides TS60. 2β-Hydroxyperibysin A (6), which was isolated by changing the culture conditions of the above fungus, was converted to (4S)-peribysin E MTPA esters. These compounds showed identical 1H NMR spectral properties to those reported in the isolation paper.