Derivatives of 1,3-dimethyl-5-methylenebarbituric acid

被引：0
|
作者：
Kuhn, N [1 ]
Kuhn, A [1 ]
Niquet, E [1 ]
Steimann, M [1 ]
Sweidan, K [1 ]
机构：
[1] Univ Tubingen, Inst Anorgan Chem, D-72076 Tubingen, Germany
来源：
ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES | 2005年 / 60卷 / 09期
关键词：
zwitterionic compounds; heterocycles; imidazoles; barbituric acid; crystal structure;
D O I：
暂无
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
1,3-Dimethylbarbituric acid (1, R = Me) reacts with aqueous formaldehyde in the presence of pyridine to give 1,3-dimethyl-2,4,6-trioxo-5-pyridinomethyl-1,3-perhydrodiazin-5-yl-pyridinium ylide (6) in good yield. From 6 and 2,3-dihydro-1,3-diisopropyl-4,5-dimethylimidazol-2-ylidene (7), the zwitterionic imidazolium derivative 1,3-dimethyl-2,4,6-trioxo-5-(1,3-diisopropyl-4,5-dimethylimidazoliomethyl)-1,3-perhydrodiazin-5-yl-imidazolium ylide (8) is obtained. Similarly, the phosphonium compound 1,3-diinethyl-2,4,6-trioxo-5-triphenylphosphoniomethyl-1,3-perhydrodiazin-5-y l-phosphonium ylide (9) is obtained from 6 and PPh3. The crystal structures of 8 and 9 are reported.
引用
收藏
页码：924 / 928
页数：5
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