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2 047 592

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C1

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Application

93011565/04, 1993-03-04

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Actual filing date

1993-03-04

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Published

1995-11-10

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Inventor

Zhesko T.E.Bojarskij V.P.Nikitina A.G.Novikova E.G.Romashchenkova N.D.Bogach E.V.Rudnev Ju.P.Mil'Gotin I.M.

(73)

Holder

Nauchno-Proizvodstvennaja Firma Aktsionernoe Obshchestvo Zakrytogo Tipa

PROCESS FOR PREPARING CALCIUM SALT OF PHENYLPYRORACEMIC ACID Russian patent published in 1995 - IPC

Abstract RU 2047592 C1

FIELD: organic chemistry. SUBSTANCE: the product: pyroracemic acid of the empirical formula: C18H14O6Ca.. The content of impurities is 5-6% the yield is 70-75% Reagent 1: benzyl chloride. Reagent 2: carbon oxide. Reaction conditions: in the aqueous alcoholic medium at 35-45 C and at a CO pressure of 1-5 atm in the presence of calcium oxide or hydroxide and a catalyst such as a cobalt carbonyl compound at a cobalt concentration of 1.5-4.0% EFFECT: more efficient preparation process. 1 tbl

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RU 2 047 592 C1

Authors

Zhesko T.E.

Bojarskij V.P.

Nikitina A.G.

Novikova E.G.

Romashchenkova N.D.

Bogach E.V.

Rudnev Ju.P.

Mil'Gotin I.M.

Dates

1995-11-10—Published

1993-03-04—Filed

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