(2-amino-4-methyl-thiophen-3-yl)-(2-fluoro-phenyl)-methanone 、 氨基甲酸乙酯 在
氯化锌氯仿 、 水 作用下,
反应 0.5h,
以to give crude crystals of 4-(o-fluorophenyl)-5-methyl-1,2-dihydrothieno[2,3-d]pyrimidin-2-one having a melting point of 258° - 261°C.的产率得到4-(o-fluorophenyl)-5-methyl-1,2-dihydrothieno[2,3-d]pyrimidin-2-one
Bicyclic thiophene derivatives, 1,5-dimethyl-(1) and 3,5-dimethyl-4-(o-fluorophenyl)-l,2-dihydrothieno[2,3-d]-pyrimidin-2-ones (3), 2-acetylamino-3-(o-fluorobenzoyl)-4-methylthiophene (5), and some derivatives (2, 4, 6, 7), have been prepared. 1H, 19F Spin couplings over seven bonds, 7JHF, attributable to a through-space mechanism have been observed in the 1H NMR spectra of these compounds.