Abstract

1,3-Oxazolidine-2-thiones fused to ketohexose backbone were prepared from 1-O-, 1-N- or 1-Sderivatives in reasonable yields. Spontaneous ring closure leads to spiro-tricyclic unexpected aminal and amide structures.

Keywords: 1,3-oxazolidine-2-thione, ketohexoses, l-sorbose, d-fructose