Preparation of 1,4-lactones of 3,6-anhydrohexanoic acids

Details Preparation of 1,4-lactones of 3,6-anhydrohexanoic acids Preparation of 1,4-lactones of 3,6-anhydrohexanoic acids

1984-03-16

1986-04-08

Michl, Paul R.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D30512

Patent

active

045814651

ABSTRACT:
The invention is a process for the preparation of a 1,4-lactone of 3,6-anhydrohexanoic acid which comprises refluxing a 1,4- or 1,5-lactone of pentahydroxyhexanoic acid, or an aqueous solution of pentahydroxyhexanoic acid in an organic reaction media which azeotropes with water in the presence of an inorganic acid, under conditions such that a 1,4-lactone of 3,6-anhydrohexanoic acid is formed.

REFERENCES:
patent: 1985255 (1934-12-01), Isbell
Glucurolactone, Chemical Division, Corn Products Refining Co., p. 2, Publication Circa, 1952.
Merck Index (10th Edition, 1983) Gluconic Acid, Substance No. 4316, p. 638.
Merck Index (10th Edition, 1983) D-Glucuronolactone, Substance No. 4329, pp. 640-641.
Haworth et al., J. Chem. Soc. (London), 88 (1941).

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