(thio)ureas and isocyanates derived from enantiomerically enriched 4-amino-4-aryl-5,5,5-trifluoropentan-2-ones affords a novel synthetic access to chiral 4-trifluoromethyl-substituted 3,4-dihydropyrimidin-2(1H)-(thi)ones and 3,4-dihydro-1,3-oxazin-2-ones, respectively.
衍生自对映异构体富集的4-
氨基-4-芳基-5,5,5-三
氟戊烷-2-酮的二取代(
硫代)
脲和
异氰酸酯的环缩合提供了手性4-三
氟甲基取代的3,4-二氢
嘧啶的新颖合成途径-2(1 H)-(thi)ones和3,4-dihydro-1,3-oxazin-2-ones。