Optically active ether lactone, optically active polymer thereof

Details Optically active ether lactone, optically active polymer thereof Optically active ether lactone, optically active polymer thereof

1993-03-02

1993-11-23

Kight, III, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

525415, 528357, 549267, C08G 6308, C07D32108

Patent

active

052645479

ABSTRACT:
An optically active 7-substituted-1,4-dioxepan-5-one derivative represented by the general formula (I): ##STR1## wherein R represents an alkyl group having from 1 to 5 carbon atoms; and * means an asymmetric carbon atom, is disclosed. An optically active polymer represented by formula (II): ##STR2## wherein R and * are as defined above; and n is an integer of 25 or more, obtained by ring opening polymerization of the optically active 7-substituted-1,4-dioxepan-5-one derivative represented by formula (I) is also disclosed. A process for producing the optically active polymer represented by formula (II) is further disclosed, comprising subjecting an optically active 7-substituted-1,4-dioxepan-5-one derivative represented by formula (I) to ring opening polymerization in the presence of at least one catalyst selected from the group consisting of (i) an organotin compound, (ii) an organoaluminum compound and water, and (iii) an organozinc compound and water.

REFERENCES:
patent: 4052988 (1977-10-01), Doddi et al.
patent: 4441496 (1984-04-01), Shalaby et al.
patent: 4470416 (1984-09-01), Kafrawy et al.
patent: 4920203 (1990-04-01), Tang et al.
patent: 5028667 (1991-07-01), McLain et al.
patent: 5208297 (1993-05-01), Ford et al.
patent: 5221755 (1993-06-01), Yamaguchi et al.

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