Process for the preparation of...

Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...

Reexamination Certificate

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Reexamination Certificate

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07151181

ABSTRACT:
Methods are provided for improving production of 3,5-diethyl-1,2-dihydro-1-phenyl-2-propylpyridine (DHP). In one illustrative embodiment, the methods involve controlling the rate of reaction and temperature of the reaction during formation of DHP. In another illustrative embodiment, the methods involve neutralizing the acid catalyst subsequent to DHP formation.

REFERENCES:
Cindric, Marina et. al., “Hexanuclear complexes of molybdenum (V) containing [Mo6O12(OCH3)4(acac)3]-anion”, Polyhedron 19 (2000), pp. 1471-1478.

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