Method and intermediates for preparing high purity 3,3'-azo-bis-

Details Method and intermediates for preparing high purity 3,3'-azo-bis- Method and intermediates for preparing high purity 3,3'-azo-bis-

1983-01-31

1985-07-09

Higel, Floyd D.

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

Organic compounds

Azo

260456A, 260456P, 534583, 534588, 534660, 534730, 534887, C07C10706, C09B 2901, C09B 2914, C09B 4300

Patent

active

045283672

ABSTRACT:
A method of preparing 3,3'-azo-bis-(6-hydroxy benzoic acid) of formula I ##STR1## and salts thereof in at least 98% purity for treating inflammatory intestinal diseases. According to the invention a compound II ##STR2## is diazotized, and the diazonium salt obtained is coupled with a compound III ##STR3## The formed intermediate IV, which is also comprised by the invention, ##STR4## is hydrolized in alkaline medium to form the compound I. R.sub.1, R.sub.2 and R.sub.3 signify lower alkyl, R.sub.2 also possibly substituted phenyl.

REFERENCES:
patent: 1157169 (1914-11-01), Mettler
patent: 1848772 (1932-03-01), Felix
patent: 2690438 (1954-09-01), Kracker
patent: 4045429 (1977-08-01), Agback

Affiliated with

Also associated with

Rating

Method and intermediates for preparing high purity 3,3'-azo-bis- does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and intermediates for preparing high purity 3,3'-azo-bis-, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and intermediates for preparing high purity 3,3'-azo-bis- will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-910127