申请人:The Dow Chemical Company
公开号:US05034536A1
公开(公告)日:1991-07-23
Unsaturated esters with an alkyl group at the 2 carbon, such as methyl methacrylate, react with .beta.-aminoalkanols, such as 2-aminoethanol, in the presence of an alkali metal alkoxide or hydroxide such as sodium methoxide, under moderate temperatures to form an amide such as N-(2-hydroxyethyl)methacrylamide. The amide may be cyclized by a weak Lewis acid, such as ferric chloride, at about 220.degree. C. to form a 2-alkenyl oxazoline, such as isopropenyl oxazoline.
具有2碳上烷基基团的不饱和酯,如丙烯酸甲酯,与β-氨基烷醇,如2-氨基乙醇,在碱金属烷氧化物或氢氧化物(如甲氧基钠)存在下,在适中温度下反应,形成酰胺,如N-(2-羟乙基)丙烯酰胺。酰胺可以通过弱Lewis酸(如氯化铁)在约220°C下环化,形成2-烯基噁唑啉,如异丙烯基噁唑啉。