Simple Total Syntheses of Biologically Active Pentathiadecane Natural Products, 2,4,5,7,9-Pentathiadecane 2,2,9,9-Tetraoxide (Dysoxysulfone), from Dysoxylum richii, and 2,3,5,7,9-Pentathiadecane 9,9-Dioxide, the Misidentified Lenthionine Precursor SE-3 from Shiitake Mushroom (Lentinus edodes)
作者:Eric Block、Russell DeOrazio、Mohan Thiruvazhi
DOI:10.1021/jo00088a001
日期:1994.5
Brief total syntheses are reported for 2,4,5,7,9-pentathiadecane 2,2,9,9-tetraoxide (dysoxysulfone, 1), from the Fijian tree Dysoxylum richii, 2,3,5,7,9-pentathiadecane 9,9-dioxide (8), from shiitake mushroom (Lentinus edodes),and 2,4,5,7-tetrathiaoctane 2,2-dioxide (2a) from Tulbaghia violacea, starting from 1,2,4-trithiolane (4) for 1, 1,2,4,6-tetrathiepane (5) for 8, and 2,4,5,7-tetrathiaoctane (9) for 2a and employing regiospecific oxidation of intermediate penta- or tetrasulfides using KMnO4 along with Zn(OAc)(2) or FeCl3 to prevent product degradation by the base produced during oxidation.