S. Tchertchian et Y. Vallee, A ONE-POT STEREOSELECTIVE SYNTHESIS OF HYDROXY-KETENEDITHIOACETALS FROM ALDEHYDES, Tetrahedron letters, 36(35), 1995, pp. 6225-6226
The reaction of aldehydes with dithioacetate enethiolates followed by
alkylation of the intermediate aldolate gives hydroxy-ketenedithioacet
als with high stereoselectivity.