Heterocyclization of functionalized heterocumulenes with C,N-, C,O-, and C,S-binucleophiles: X. 1-Chloroalkyl isocyanates in the synthesis of new 5-aroyldihydropyrimidines
摘要:
Reactions of 1-chlorobenzyl isocyanates with N,S-aroylketene acetals depending on the conditions provide either 5-aroyl-6-methylsulfanyl-3,4-dihyropyrimidin-2(1H)-ones or 5-aroyldihyropyrimidine-2,4(1H,3H)-diones. 1-Aryl-2,2,2-trifluoro-1-chloroethyl isocyanates in a similar condensation gave 5-aroyl-6-methylsulfanyl-2-trifluoromethyl-2,3-dihyropyrimidin-4(1H)-ones.
Heterocyclization of functionalized heterocumulenes with C,N-, C,O, and C,S-binucleophiles: IX. Reaction of 1-aryl-1-chloro-2,2,2-trifluoroethyl isocyanates with sulfanylacetic acid esters as a convenient synthetic route to 2-aryl-2-trifluoromethyl-4-oxo-1,3-thiazolidine-5-carboxylates
作者:M. V. Vovk、P. S. Lebed’、V. V. Polovinko、O. V. Manoilenko
DOI:10.1134/s107042800812021x
日期:2008.12
1-Aryl-1-chloro-2,2,2-trifluoroethyl isocyanates reacted with methyl and ethyl sulfanylacetates to give the corresponding alkyl 2-aryl-2-trifluoromethyl-4-oxo-1,3-thiazolidine-5-carboxylates.