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Molecules 2010, 15(5), 3462-3477; doi:10.3390/molecules15053462
Article

Thionation of Some α,β-Unsaturated Steroidal Ketones

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Received: 16 April 2010 / Revised: 30 April 2010 / Accepted: 10 May 2010 / Published: 12 May 2010
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Abstract

The reactions of selected α,β-unsaturated steroidal ketones with Lawesson’s reagent (LR) in CH2Cl2 and toluene under the standard reaction conditions and with a combination of phosphorus pentasulfide with hexamethyldisiloxane (P4S10/HMDO) in 1,2-dichlorobenzene (ODCB) under microwave irradiation were investigated and for this purpose several cholestane, androstane and pregnane carbonyl derivatives were chosen. Depending on the reagent and the solvent, 19 new sulfur containing compounds, including dithiones 4c and 4d, α,β-unsaturated 3-thiones 3a-e, dimer-sulfides 2a-e, 1,2,4-trithiolanes 5a-e and phosphonotrithioates 6b-e were synthesized. All newly prepared compounds were characterized by IR, 1H- and 13C-NMR spectroscopy and elemental analysis.
Keywords: α,β-unsaturated steroidal ketones; α,β-unsaturated 3-thiones; Lawesson’s reagent; P4S10/HMDO; dimerization; microwave irradiation α,β-unsaturated steroidal ketones; α,β-unsaturated 3-thiones; Lawesson’s reagent; P4S10/HMDO; dimerization; microwave irradiation
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Krstić, N.M.; Bjelaković, M.S.; Dabović, M.M.; Pavlović, V.D. Thionation of Some α,β-Unsaturated Steroidal Ketones. Molecules 2010, 15, 3462-3477.

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