Process for preparing alkyl esters of methyltartronic acid

Details Process for preparing alkyl esters of methyltartronic acid Process for preparing alkyl esters of methyltartronic acid

1985-06-17

1987-10-20

Moyer, Donald B.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

562525, 562582, 562587, C07C 6740

Patent

active

047015500

ABSTRACT:
There is described a process for preparing alkyl esters of methyltartronic acid by hydroxylation of methacrylic acid to alpha-methylglyceric acid with H.sub.2 O.sub.2, in an aqueous medium, in the presence of H.sub.2 WO.sub.4 and optionally of H.sub.3 PO.sub.4 or H.sub.3 AsO.sub.4 or alkaline salts thereof as catalysts, at pH<2 and at temperatures of from 50.degree. to 100.degree. C., by subsequent oxidation of alpha-methylglyceric acid to methyltartronic acid with HNO.sub.3 in excess or with O.sub.2, in an aqueous-alkaline medium, in the presence of Pd or Pt carried on carbon or oxides thereof as catalysts, at temperatures of 60.degree.-100.degree. C., and final esterification of methyltartronic acid with alcohols C.sub.1 -C.sub.4.

REFERENCES:
patent: 2006314 (1935-06-01), Halbig et al.
patent: 2373942 (1945-04-01), Bergsteinsson
patent: 2500599 (1950-03-01), Bergsteinsson et al.
patent: 2613223 (1952-10-01), Young
patent: 2731502 (1956-01-01), Smith
patent: 2808442 (1957-10-01), Smith et al.
Edamura et al, Chemical Abstracts, vol. 92, No. 6072w, (1980).
Mitsubishi, Chemical Abstracts, vol. 97, No. 91749t, (1982).
Kawamata et al, Chemical Abstracts, vol. 88, No. 136144z, (1978).

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