中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
(E)-3-(4-溴苯基)-2-氰基丙烯酰胺 | 3-(4-bromophenyl)-2-cyanoacrylamide | 101085-21-6 | C10H7BrN2O | 251.082 |
—— | (E)-2-cyano-3-(4-bromophenyl)-2-propenamide | —— | C10H7BrN2O | 251.082 |
(4-甲氧基苄烯)丙二腈 | 2-(4-methoxyphenylmethylene)malononitrile | 2826-26-8 | C11H8N2O | 184.197 |
A highly stereoselective synthesis of E-isomer of aldoximes was developed through a base-catalysed domino aza-Michael/retro-Michael reaction of hydroxylamine and 2-(R-benzylidene)malononitrile. This reaction generates (E)-aldoxime diastereomer in high yields (eight examples, isolated yields of 82-93 %), excellent diastereomeric purity (diastereomeric ratio higher than 95: 5 by 1H NMR), and proceeds under mild reaction conditions (aqueous NaOH, pH 12, room temperature, 4 h).