Tetrabutylammonium Fluoride → 1alpha,3beta-dihydroxy-20(S)-(4-ethyl-4-hydroxyhexylthio)pregna-5,7,16-triene

Participants

Reaction Steps

Under the same conditions as in Example 9, the crude 1α-(tert-butyldimethylsilyloxy)-3β-hydroxy-20(S)-(4-ethyl-4-hydroxyhexylthio)pregna-5,7,16-triene (71.4 mg) obtained in Example 8, tetrahydrofuran (2 ml) and 1M tetra-n-butyl-ammonium fluoride solution in tetrahydrofuran (2 ml) were reacted and worked up, and then the residue was purified by preparative thin layer chromatography (0.5 mm×2, dichloromethane:ethanol=7:1, developed once) to give the title compound as a colorless oil (45.8 mg, 67%, 2 steps).

Provenance & Evidence