Hydroxy-β-Thiolactams to Oxazole-2-thiones. A Novel DMSO-Promoted Oxidation
作者:Xavier Creary、Andrea Losch
DOI:10.1021/ol802050a
日期:2008.11.6
3-Aryl-3-hydroxy-1-methylazetidine-2-thiones react with HCl in DMSO to give 3-methyl-5-aryloxazole-2-thiones. Substituenteffects correlate with rateeffects on hydrolyses of acetals of benzaldehyde. An (17)O labeling experiment indicates that the oxygen atom of the product is derived from the hydroxyl group. Trifluoroacetic anhydride/DMSO in CH2Cl2 can also promote the reaction. Mechanisms involving