Va. Dorokhov et al., SYNTHESIS OF 1,3-THIAZOLINE DERIVATIVES FROM BETA-DICARBONYL COMPOUNDS AND PHENACYL THIOCYANATE, Russian chemical bulletin, 42(11), 1993, pp. 1854-1856
Acetylacetone and ethyl acetoacetate undergo addition at the C=N bond
of phenacyl thiocyanate in the presence of Ni(acac)2 to give the respe
ctive ketene N,S-acetals, which undergo smooth cyclization to afford 2
-methylene-4-phenyl-1,3-thiazoline derivatives when refluxed in THF.