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    • 27. 发明授权
    • Preparation of 2-(2,2-dimethyl-3-buten-1-yl)-2-oxazolines
    • 制备2-(2,2-二甲基-3-丁烯-1-基)-2-恶唑啉
    • US4283544A
    • 1981-08-11
    • US15376
    • 1979-02-26
    • Manfred JautelatDieter Arlt
    • Manfred JautelatDieter Arlt
    • C07D263/04C07D263/12C07D263/14
    • C07D263/04C07D263/12
    • A process comprising reacting a 2-methyloxazoline of the formula ##STR1## in which R.sup.1, R.sup.2, R.sup.3 and R.sup.4 each indpendently is hydrogen, alkyl, aralkyl, optionally substituted aryl or two of them together form a ring,with a 3-methyl-2-buten-1-yl derivative of the formula ##STR2## in which X is halide, sulphonate or phosphate,thereby to produce a 2-methyl-3-(3-methyl-2-butenyl)-2-oxazolinium salt of the formula ##STR3## reacting the oxazolinium salt with an alcoholate of the formulaR.sup.5 --O--M (V)in whichM is a one equivalent of an alkali metal or alkaline earth metal cation,to produce an oxazolidine of the formula ##STR4## pyrolyzing the oxazolidine to produce a 2-methylene-3-(3-methyl-2-butenyl)-oxazolidine of the formula and heating the 2-methylene-3-(3-methyl-2-butenyl)-oxazolidine to produce a 2-(2,2-dimethyl-3-buten-1-yl)-2-oxazoline of the formula ##STR5## The compounds (II), (III) and (IV) are new.
    • 一种方法包括使式(VI)的2-甲基恶唑啉(其中R 1,R 2,R 3和R 4各自独立地为氢,烷基,芳烷基,任选取代的芳基或其中的两个一起形成环)与3 (VII)的2-甲基-2-丁烯-1-基衍生物,其中X是卤化物,磺酸盐或磷酸盐,从而产生2-甲基-3-(3-甲基-2-丁烯基) - 式(Ⅳ)的2-恶唑啉盐使恶唑啉盐与式为R5-OM(Ⅴ)的醇化物反应,其中M为1当量碱金属或碱土金属阳离子,以产生恶唑烷 (III)热解恶唑烷以制备式(II)的2-亚甲基-3-(3-甲基-2-丁烯基) - 恶唑烷并加热2-亚甲基-3- (3-甲基-2-丁烯基) - 恶唑烷以制备下式的2-(2,2-二甲基-3-丁烯-1-基)-2-恶唑啉(I)化合物(II), (三)和(四)是新的。