发明授权
- 专利标题: Process for preparing cyclopropylacetylene
- 专利标题(中): 环丙基乙炔的制备方法
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申请号: US09380382申请日: 1999-09-01
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公开(公告)号: US06207864B1公开(公告)日: 2001-03-27
- 发明人: Michael Henningsen , Armin Stamm , Martin Fischer , Wolfgang Siegel
- 申请人: Michael Henningsen , Armin Stamm , Martin Fischer , Wolfgang Siegel
- 优先权: DE19709401 19970307; DE19732292 19970726
- 主分类号: C07C4530
- IPC分类号: C07C4530
摘要:
The invention relates to a process for the halogenation of cyclopropylmethyl ketone with at least one dihalo-triorganophosphorane of the general formula I R3PHal2 (I), in which the radicals R can be the same or different and denote a saturated or unsaturated aliphatic C1-C20 hydrocarbon radical, a phenyl or (C1-C4 alkyl)phenyl radical, which may be optionally substituted by one or two fluorine, chlorine and/or nitro groups, P stands for phosphorus and Hal denotes chlorine, bromine, or iodine, at a temperature of from 800° to 130° C., where the dihalo-triorganophosphane of the general formula (I) is synthesized in situ from triorganophosphane oxide or triorganophosphane sulfide of the general formula II R3PA (II), in which R is as defined above with respect to formula I and A denotes oxygen or sulfur, using a halogenating agent, wherein the triorganophosphane oxide or triorganophosphane sulfide is used in catalytic amounts, to the halogenation product of cyclopropylmethyl ketone obtained in said process, and to a process for the conversion of said halogenation product to cyclopropylacetytene.