发明名称 |
2-HYDROCARBYL-3,6-DICHLOROPYRIDINES AND THEIR PREPARATION |
摘要 |
2-Hydrocarbyl-3,6-dichloropyridines are prepared from dichloromethyl hydrocarbyl ketones and acrylonitrile in a two-step process involving an addition reaction under basic conditions to form intermediate 1,1-dichloro-3-cyanopropyl hydrocarbyl ketones and a subsequent cyclization reaction in the presence of hydrogen chloride. Thus, 3,6-dichloro-2-methylpyridine is prepared from 1,1-dichloro-2-propanone and acrylonitrile by the formation and further reaction of 4,4-dichloro-5-oxo-hexanenitrile. The intermediates and products are novel compounds useful in the preparation of herbicides and nitrification inhibitors. 34,270A-F |
申请公布号 |
CA1314897(C) |
申请公布日期 |
1993.03.23 |
申请号 |
CA19870546118 |
申请日期 |
1987.09.04 |
申请人 |
DOW CHEMICAL COMPANY (THE) |
发明人 |
HALPERN, MARC E.;DIETSCHE, THOMAS J.;ORVIK, JON A.;BARRON, J. BRIAN |
分类号 |
C07D213/61 |
主分类号 |
C07D213/61 |
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