Abstract: 1, 3-Dipolar cycloadditions of N-methyl-C, C-diphenylnitrone (15) and N-methyl-C- phenylnitrone (16) with aliphatic thioketones are equilibrium reactions. The 1, 4, 2- 0xathiazolidines were characterized and their dissociation constants measured by'H NMR analysis and by visible spectrophotometry. of the adduct 28 from 16 and 2, 2, 6, 6- tetramethylcyclohexanethione (27) was determined from 20-76" C, revealing &&d=-10.8 ...
![2,2',2',4',4'-pentamethyl-3-phenylspiro[(1,4,2)-oxathiazolidine-5,3'-cyclobutane]-1'-one Structure](https://image.chemsrc.com/caspic/164/50455-59-9.png)
