Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Reexamination Certificate
2005-05-24
2005-05-24
Tsang, Cecilia J. (Department: 1625)
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
C546S352000
Reexamination Certificate
active
06897320
ABSTRACT:
The present invention relates to a process for the preparation of 2,6-divinylpyridine and 2-methyl-6-vinylpyridine over modified zeolite catalysts. In particular, it relates to the method for the synthesis of 2,6-divinylpyridine and 2-methyl-6-vinylpyridine from 2,6-lutidine and formaldehyde in vapour phase in an eco-friendly method with high yield and selectivity. This invention provides a non-corrosive, eco-friendly process, where the catalyst can be reused for many times. 2,6-Divinylpyridine is useful stating material in polymer industry.
REFERENCES:
patent: WO 0234720 (2002-05-01), None
Kuindzhi et al, Chemical Abstracts, vol. 68, No. 25, Jun. 17, 1968, Columbus, Ohio, US; abstract No. 114378, XP002267029, “6-Methyl-2-vinylpyridine” & Metody Polucheniy A Khimicheskikh Reaktivov I Preparatov (1967), No. 15, 93-5.
Gangapuram Madhavi
Kondapuram Vijaya Raghavan
Kulkarni Shivanand Janardan
Council of Scientific and Industrial Research
Covington Raymond
Nixon & Vanderhye P.C.
Tsang Cecilia J.
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