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NOVEL METHOD FOR PRODUCING 4,4'-(1-METHYL-1,2-ETHANEDIYL)-BIS-(2,6-PIPERAZINEDIONE)
NOVEL METHOD FOR PRODUCING 4,4'-(1-METHYL-1,2-ETHANEDIYL)-BIS-(2,6-PIPERAZINEDIONE)
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机译：生产4,4'-（1-甲基-1,2-乙二基）-BIS-（2,6-哌嗪二酮）的新颖方法
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摘要
A method for preparing compounds of the formula (I) by the cyclization of tetraacetic acid alkyl esters of the formula (II) in the presence of ammonia and formamide as well as to the compounds of the formula (II), which are used in this method.
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