Synthesis and Alkylation of Spiro-2-oxazolines Containing Fused 3,4-Dihydropyrazin-2(1H)-ones
作者:Bojan Verček、Irena Mušič
DOI:10.3987/com-11-12299
日期:——
Spiro-2-oxazolines containing 3,4-dihydroquinoxalin-2(1H)-one, 3,4-dihydrobenzoquinoxalin-2(1H)-one, 1,2-dihydropyrido[2,3-b]pyrazin-3(4H)-one or 5,6-dihydropteridin-7(8H)-one moiety were prepared by heating of aromatic or heteroaromatic diamines with 2-benzoylamino-3-chloropropenoic acid in the presence of triethylamine. Treatment of spiro-2-oxazolines with MeI or EtBr using Bu(4)NHSO(4) and K(2)CO(3) introduced the methyl or ethyl group on the lactam nitrogen atom.