DIARYL-SUBSTITUTED MALEIC ANHYDRIDES
DIARYL-SUBSTITUTED MALEIC ANHYDRIDES
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DOI：
10.1021/jo00304a034
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发表时间：
1990-08-17
影响因子：
3.6
通讯作者：
HALL, HK
中科院分区：
文献类型：
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作者：
FIELDS, EK;BEHREND, SJ;HALL, HK
丙二醛在氯仿中的分子内氢键顺式烯醇形式被甲醇和3，3-二甲氧基丙醛等甲氧基化合物转化为分子间氢键的反式烯醇。丙酮和二氧六环等“极性杂质”不会引起这种效应。在水溶液中，SODIO-1在pH>；6时占优势。根据核磁共振偶合常数，SODIO-1和SODIO-1在水溶液中都发生了易位构型。
The intramolecularly H-bonded cis enolic form of malondialdehyde in chloroform is converted to an inter-molecularly H-bonded trans enol by methoxy compounds such as methanol and 3, 3-dimethoxypropanal.“Polar impurities” such as acetone and dioxane do not induce this effect. In aqueous solution sodio-1 predominates at pH> 6. Based upon NMR coupling constants, both 1 and sodio-1 have the transconfiguration in aqueous solution.