Process for producing substituted or unsubstituted 2-phenyl-1.2.

Details Process for producing substituted or unsubstituted 2-phenyl-1.2. Process for producing substituted or unsubstituted 2-phenyl-1.2.

1975-08-12

1977-04-12

Rollins, Alton D.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07D24906

Patent

active

040175090

ABSTRACT:
2-Phenyl-1.2.3-triazole-4-carboxaldehydes having the formula: ##STR1## are obtained by oxidizing a 2-phenylglycosotriazole having the formula: ##STR2## wherein R is hydrogen, halogen, methyl, carboxyl, a sulfonic acid group or the alkali metal salt thereof, n is 2 or 3, R' is hydroxymethyl when n is 2 and is hydroxymethyl or methyl when n is 3, with an oxide of manganese such as manganese dioxide or manganese oxide in dilute sulfuric acid of 20 to 80 wt. % concentration at a temperature of 0.degree. to 80.degree. C. The oxidation reaction is carried out in a dispersed state for from 2 to 100 hours and the resultant aldehyde is separated from the reaction mixture by extraction with an organic solvent. The purity of the aldehyde thus obtained is higher than 85 wt. % and the yield is 40% to quantitative on the basis of 2-phenylglycosotriazole. The aldehyde can be further purified by convenient means.

REFERENCES:
patent: 3637673 (1972-01-01), Okubo et al.
patent: 3891632 (1975-06-01), Fleck et al.
Vargha et al., J. Chem. Soc., (London), 1951, pp. 1068-1069.
Riebsomer et al., J. Org. Chem., vol. 13, pp. 807-814, (1948).
Albert et al., J. Chem. Soc., Perkin Trans. I, 1973, pp. 1629-1633.
Drummond et al., J. Chem. Soc. (London), 1953, pp. 435-443.

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