The reduction of ethyl 2-methylthio-(or 2-ethoxy)pyrimidine-5-carboxylate by LiAlH4 afforded ethyl 2-methylthio-(or 2-ethoxy)-1,6-dihydropyrimidine-5-carboxylate as the main product. Similarly, the reduction of 2-methylthio-(or 2-methoxy)pyrimidine-5-carboxamide by LiAlH4 gave 2-methylthio-(or 2-methoxy)-1,6-dihydropyrimidine-5-carbonitrile as main product.
LiAlH4 还原 2-甲硫基-(或 2-乙氧基)嘧啶-5-甲酸乙酯的主要产物是 2-甲硫基-(或 2-乙氧基)-1,6-二氢嘧啶-5-甲酸乙酯。同样,用 LiAlH4 还原 2-甲硫基-(或 2-甲氧基)嘧啶-5-甲酰胺,主要产物为 2-甲硫基-(或 2-甲氧基)-1,6-二氢嘧啶-5-甲腈。