4.
Alternative synthesis of 6-(3-methoxybenzyl)pyrazin-2(1H)-one. Synthesis of indeno1,2-bpyrazin-2-ones. Crystal structures of 5-acetoxy-1-benzyl-4-tert-butoxycarbonyl-6-(3-methoxybenzylidene)piperazin-2-one, 1-benzyl-4-tert-butoxycarbonyl-7-methoxy-1,3,4,4a-tetrahydroindeno1,2-bpyrazin-2-one and 1-benzyl-4-tert-butoxycarbonyl-7-methoxy-1,3,4,9-tetrahydroindeno1,2-bpyrazin-2-one
机译:Alternative synthesis of 6-(3-methoxybenzyl)pyrazin-2(1H)-one. Synthesis of indeno1,2-bpyrazin-2-ones. Crystal structures of 5-acetoxy-1-benzyl-4-tert-butoxycarbonyl-6-(3-methoxybenzylidene)piperazin-2-one, 1-benzyl-4-tert-butoxycarbonyl-7-methoxy-1,3,4,4a-tetrahydroindeno1,2-bpyrazin-2-one and 1-benzyl-4-tert-butoxycarbonyl-7-methoxy-1,3,4,9-tetrahydroindeno1,2-bpyrazin-2-one