Novel synthesis of cyclic compounds

Details Novel synthesis of cyclic compounds Novel synthesis of cyclic compounds

1990-01-16

1991-02-26

Bond, Robert T.

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

Organic compounds

Unsubstituted hydrocarbyl chain between the ring and the -c-...

540488, C07D26900

Patent

active

049963155

ABSTRACT:
Novel cyclic ester-amides having the formula: ##STR1## where R is an alkyl group having from 2 to 5 carbon atoms, and x ranges from 2 to 6 by reacting a polyethylene glycol monoamine having the formula NH.sub.2 --(CH.sub.2 CH.sub.2 O).sub.x --H, where x is as above, with at least one dicarboxylic acid, where the dicarboxylic acid is selected from the group consisting of glutaric, adipic, pimelic acids and mixtures thereof. The a molar ratio of polyethylene glycol monoamine to dicarboxylic acid should be about 1:1. Catalysts may be optionally used, and may include such compounds as titanium alkoxides; and zinc, manganese and antimony salts of carboxylic acids. This method is anticipated to be a useful step in a new preparation of valuable cyclic products.

REFERENCES:
patent: 3452002 (1969-06-01), Brasch
patent: 4487928 (1984-12-01), Richter et al.
C. J. Pedersen, "Cyclic Polyethers and Their Complexes with Metal Salts," Journal of the American Chemical Society, vol. 89, No. 10, May 10, 1967, pp. 2495-2496.
C. J. Pedersen, "Cyclic Polyethers and Their Complexes with Metal Salts," Journal of the American Chemical Society, vol. 89, No. 26, Dec. 20, 1967, pp. 7017-7036.
D. J. Brunelle et al., "Preparation and Polymerization of Cyclic Oligomeric Carbonates: New Route to Super-High Molecular Weight Polycarbonate: An Overview," Polymer Preprints, vol. 30, No. 2, Sep. 1989, pp. 569-570.

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