Production of thiophene-2,5-dicarboxylic acid diesters, tetrahyd

Details Production of thiophene-2,5-dicarboxylic acid diesters, tetrahyd Production of thiophene-2,5-dicarboxylic acid diesters, tetrahyd

1993-01-19

1994-05-10

Raymond, Richard L.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D33338

Patent

active

053109406

ABSTRACT:
A method of producing a dibenzoxazolyl thiophene represented by the formula ##STR1## wherein R"' represents a hydrogen, an alkyl of 1-8 carbons, a cycloalkyl, a phenyl, a substituted phenyl or a benzyl, which includes: reacting a thiophene-2,5-dicarboxylic acid diester represented by the formula ##STR2## wherein R' represents a branched alkyl of 3-5 carbons, phenyl, or tolyl, with an aminophenol represented by the formula ##STR3## wherein R"' is the same as before, in the presence of an acid catalyst, wherein the acid catalyst is boric acid, phosphoric acid, polyphosphoric acid, zinc chloride, ferric chloride, or sulfuric acid.

REFERENCES:
patent: 2746973 (1956-05-01), Gregory et al.
patent: 3255199 (1966-06-01), Maeder
patent: 4925961 (1990-05-01), Ikeda et al.
patent: 5071993 (1991-12-01), Leppard
Ogata et al, "Active Polycondensation of Diesters Having Heterocyclic Nuclei", Polymer Journal, vol. 7, No. 1, pp. 72-78 (1975).
J. March, "Advanced Organic Chemistry" 3rd ed., pp. 320-322, John Wiley & Sons, New York (1985).
G. Kossmehl et al., Z. Naturforsch, 386, pp. 1669-1677, "Liquid Crystalline Compounds in the Thiophene Series," (1983).
D. M. Torikov et al., Chemical Abstracts, 87: 5747e, p. 463, Abstract of Nauch-Temal Sb Ufim Neft. In-t, 1975, (22), pp. 120-125 (Russ.), (1977).
G. Kossmehl et al., Chemical Abstracts 101: 23243, p. 580, Abstract of Z. Naturforsch, (1983) 38b, pp. 1669-1677 (Ger) (1984).

Affiliated with

Also associated with

Rating

Production of thiophene-2,5-dicarboxylic acid diesters, tetrahyd does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Production of thiophene-2,5-dicarboxylic acid diesters, tetrahyd, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Production of thiophene-2,5-dicarboxylic acid diesters, tetrahyd will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2413433