Process for the preparation of 2-hydroxy-4,6-diaryl-1,3,5-triazi

Details Process for the preparation of 2-hydroxy-4,6-diaryl-1,3,5-triazi Process for the preparation of 2-hydroxy-4,6-diaryl-1,3,5-triazi

1993-02-01

1994-02-22

Ford, John M.

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

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

C07D25152

Patent

active

052888673

ABSTRACT:
There is disclosed a process for the preparation of 2-hydroxy-4,6-diaryl-1,3,5-triazines, which comprises reacting the compound of formula ##STR1## wherein R is hydrogen, C.sub.1 -C.sub.4 alkyl or halogen, with urea, using a base selected from the class of the alkali metal hydrides, alkaline earth metal hydrides, or alkali metal amides, alkaline earth metal amides, or of the alkali metal C.sub.1 -C.sub.4 alcoholates in the presence of a polar solvent, to give the final products in a one step process in which the molar ratio of urea to base is 1:2 to 1:3 and the molar ratio of compound of formula (1) to urea is 2:1 to 5:1.
2-Hydroxy-4,6-diaryl-1,3,5-triazines are prepared in very good yield by the inventive process. The compounds are used as intermediates for the synthesis of UV absorbers.

REFERENCES:
patent: 3855220 (1974-12-01), Fischer
patent: 3901678 (1975-08-01), Fischer
Alsofrom et al, J. Het. Chem. vol. 13, pp. 917-919 (1976).
Chemical Communications, 498 (1971).

Affiliated with

Also associated with

Rating

Process for the preparation of 2-hydroxy-4,6-diaryl-1,3,5-triazi does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the preparation of 2-hydroxy-4,6-diaryl-1,3,5-triazi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the preparation of 2-hydroxy-4,6-diaryl-1,3,5-triazi will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-172571