K. Matsuda et al., ONE-POT PREPARATION OF 1-SUBSTITUTED IMIDAZOLE-2-THIONE FROM ISOTHIOCYANATE AND AMINO ACETAL, Synthetic communications, 27(20), 1997, pp. 3565-3571
Isothiocyanates were treated with amino acetal and conc. HCl (0.5 eq.)
successively in one-pot to afford 1-substituted imidazole-2-thiones i
n good yields.