Synthesis of alkyl hexahydropyrazino-[1,2-c]pyrimidine-9-carboxylates

2011

via cyclocondensation of 3-alkoxycarbonylmethylidenepiperazinones (I) with α-chlorobenzyl isocyanates or 1-aryl-2,2,2-trifluoroethyl isocyanates

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