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(1)制造β烯醇是可以用溴丙烯铝。此法优点是可用价较廉的金属铝,可以节省乙醚(因为在用格林雅尔方法时,需要很稀的溴丙烯乾醚溶液,用多一倍的乙醚)。产量也稍高些。它的缺点是祇适用于脂肪族,对于芳香族醛、酮,不起成作用。 (2)若用溴丙烯与铝及醛、酮,在苯溶剂中进行。所得到的是多量的1,2,二苯基丙烷。 (3)溴丙烯铝在乙醚溶剂中,不能与乙腈,原甲酸乙酯,呋喃甲醛起加成作用。
(1) It is possible to use bromopropene to make β-enol. The advantage of this method is that the cheaper aluminum metal can save the ether (because in the case of the Grignard method, it requires a very dilute solution of brominated propene ether and twice the amount of ether). Yield is slightly higher. Its disadvantage is only applicable to aliphatic, for aromatic aldehydes, ketones, can not afford to play a role. (2) If bromine propylene and aluminum and aldehydes, ketones, in benzene solvent. What is obtained is a large amount of 1,2-diphenylpropane. (3) bromopropene in ether solvent, not with acetonitrile, ethyl orthoformate, furfural played a role in addition.