3-hydroxy-2-cyclobuten-1-one salts, their production and use

Details 3-hydroxy-2-cyclobuten-1-one salts, their production and use 3-hydroxy-2-cyclobuten-1-one salts, their production and use

1991-04-09

1992-06-02

Cintins, Marianne

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

Organic compounds

Oxygen containing

568348, C07C 4500

Patent

active

051188619

ABSTRACT:
3-Hydroxy-2-cyclobuten-1-one salts of the general formula: ##STR1## wherein R is an ammonium group of the general formula: ##STR2## wherein R.sub.1, R.sub.2 and R.sub.3 are the same or different in meaning and each is a hydrogen atom, a lower alkyl group or a cycloalkyl group or R is an alkali metal atom. The salts according for formula I are obtained by the reaction of pure 3-acetoxy-2-cyclobuten-1-one, or 1,3-cyclobutanedione or a distillation residue of the diketene production containing 3-acetoxy-2-cyclobuten-1-one, with a base. The base can be an amine of the general formula: ##STR3## wherein R.sub.1, R.sub.2, and R.sub.3 have the above-mentioned meaning, or an alkali metal alcoholate or an alkali metal hydroxide. The salts according to formula I are suitable for the production of squaric acid, by their being halogenated in a first step and then being hydrolyzed to squaric acid in a second step.

REFERENCES:
patent: 4092146 (1978-05-01), Fischer
patent: 4104308 (1978-08-01), Gadek et al.
patent: 4461681 (1984-07-01), Barber
patent: 4523980 (1985-06-01), Barber
Uehara, A., and Tsuchiya, R., Sci. Rep. Kanazawa Univ., (1980), 25, pp. 83 to 85.
Bellus, D., et al., Helv. Chim. Acta., 61, (1978), pp. 1784 to 1812.
Fabre, P. L. et al., Bull. Soc. Chim. Fr., (1988), pp. 933 to 936.
Angew. Chemie, (1963), 75, p. 982.
Fan, R., et al., Chemical Abstracts, (1987), 106, 103798c.
Maahs, G., and Hegenberg, P., Angew. Chemie, (1966), 78, pp. 927 to 931.
Angew. Chem., 20, (1966), p. 931.
Roedig, A., and Bernemann, P., Liebigs Ann. Chem., (1956), 600, pp. 1 to 11.
Maahs, G., Liebigs Ann. Chem., (1965), 686, pp. 55-63.
Schmidt, A. H., and Ried, W., Synthesis, (1978), pp. 869 to 880.
Paine, A. J., Tetrahedron Letters, (1984), 25, pp. 135-138.
Silvestri, G., et al., Gass. Chim. Itl., (1972), 102, pp. 818 to 821.

Affiliated with

Also associated with

Rating

3-hydroxy-2-cyclobuten-1-one salts, their production and use does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with 3-hydroxy-2-cyclobuten-1-one salts, their production and use, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and 3-hydroxy-2-cyclobuten-1-one salts, their production and use will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2230139