US5254718A
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Esters of unsymmetrically 2-substituted glycolic acid dimers
Assignee: EIDP Inc
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Filing: 1991-02-27
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Granted: 1993-10-19
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Expires: 2011-02-27
Abstract
Abstract This invention concerns esters of unsymmetrically 2-substituted glycolic acid dimers, a process for their preparation and their use in the preparation of unsymmetrically 3,6-substituted 1,4-dioxane-2,5-diones.
Inventors
- 👤 David L. Anton
- 👤 Charles E. Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:50
CPC Classifications
C; C12; C12P; C12P7/00; C12P7/62; C07; C07C; C07C69/00; C07C69/66; C07C69/67; C07C69/675; C07C69/68
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
129 words
A compound represented by the following Formula I, ##STR9## wherein: R 1 , R 2 , R 3 , and R 4 are selected from the group consisting of hydrogen, alkyl, aryl, alkaryl and aralkyl, wherein said alkyl, aryl, alkaryl and aralkyl optionally have one or more branched chain, unsaturated chain, halogen, nitrile, ketone or ether substitutions and R 5 is selected from the group consisting of alkyl, aryl, alkaryl and aralkyl, wherein said alkyl, aryl, alkaryl and aralkyl optionally have one or more branched chain, unsaturated chain, halogen, nitrile, or ether substitutions, and wherein R 1 and R 2 are not equal to R 3 and R 4 ; provided that the pk a of the equivalent alcohol of R 5 is less than or equal to 14.5.
Claim 2
Dependent Claim
129 words
A compound represented by the following Formula I, ##STR9## wherein: R 1 , R 2 , R 3 , and R 4 are selected from the group consisting of hydrogen, alkyl, aryl, alkaryl and aralkyl, wherein said alkyl, aryl, alkaryl and aralkyl optionally have one or more branched chain, unsaturated chain, halogen, nitrile, ketone or ether substitutions and R 5 is selected from the group consisting of alkyl, aryl, alkaryl and aralkyl, wherein said alkyl, aryl, alkaryl and aralkyl optionally have one or more branched chain, unsaturated chain, halogen, nitrile, or ether substitutions, and wherein R 1 and R 2 are not equal to R 3 and R 4 ; provided that the pk a of the equivalent alcohol of R 5 is less than or equal to 14.5.
Claim 3
Dependent Claim
53 words
The compound of claim 1 wherein R 1 , R 2 , and R 3 and R 4 are selected from alkyl, aryl, alkaryl and aralkyl and one or more of R 1 R 2 , R 3 , and R 4 have branched chain, unsaturated chain, halogen, nitrile, ketone or ether substitutions.
Claim 4
Dependent Claim
18 words
The compound of claim 2 wherein R 5 has branched chain, unsaturated chain, halogen, nitrile, or ether substitutions.
Claim 5
Dependent Claim
177 words
A compound of the formula: ##STR10## wherein R 1 and R 2 are not equal to R 3 and R 4 , provided that the pka of the equivalent alcohol of R 5 is less than or equal to 14.5 and wherein R 1 is H or (CH 2 ) n CH 3 where n is 0 to 3; R 2 is H Or (CH 2 ) n CH 3 where n is 0 to 17 or (CH 2 ) n R where n is greater than or equal to zero and R is H, alkyl, aryl or aralkyl, wherein said alkyl, aryl or aralkyl optionally have one or more branched chain, unsaturated chain, halogen, nitrile, ketone or ether substitutions; R 3 is H; R 4 is H or (CH 2 ) n CH 3 where n is 0 to 4; and R 5 is selected from the group consisting of alkyl, aryl, alkaryl and aralkyl, wherein said alkyl, aryl, alkaryl and aralkyl optionally have one or more branched chain, unsaturated chain, halogen, nitrile, or ether substitutions.
Claim 6
Dependent Claim
177 words
A compound of the formula: ##STR10## wherein R 1 and R 2 are not equal to R 3 and R 4 , provided that the pka of the equivalent alcohol of R 5 is less than or equal to 14.5 and wherein R 1 is H or (CH 2 ) n CH 3 where n is 0 to 3; R 2 is H Or (CH 2 ) n CH 3 where n is 0 to 17 or (CH 2 ) n R where n is greater than or equal to zero and R is H, alkyl, aryl or aralkyl, wherein said alkyl, aryl or aralkyl optionally have one or more branched chain, unsaturated chain, halogen, nitrile, ketone or ether substitutions; R 3 is H; R 4 is H or (CH 2 ) n CH 3 where n is 0 to 4; and R 5 is selected from the group consisting of alkyl, aryl, alkaryl and aralkyl, wherein said alkyl, aryl, alkaryl and aralkyl optionally have one or more branched chain, unsaturated chain, halogen, nitrile, or ether substitutions.
Claim 7
Dependent Claim
32 words
The compound of claim 4 where R in the definition of R 2 has one or more substitutions selected from the group consisting of alkene, alkyne, aryl, alkaryl, ketone, halide and ether.
Claim 8
Dependent Claim
40 words
The compound of claim 1 wherein R 5 is selected from the group consisting of phenyl, --CH 2 CCl 3 , --CH 2 CF 3 , --CH 2 C.tbd.CH, --CH 2 CH 2 F, and --CH 2 CH 2 Cl.
Claim 9
Dependent Claim
32 words
The compound of claim 1 wherein R 1 , R 2 and R 4 are H and R 3 is phenyl or (CH 2 ) n CH 3 wherein n is 0-4.
Claim 10
Dependent Claim
36 words
The compound of claim 1 wherein R 1 is H, R 2 is phenyl or (CH 2 ) n CH 3 where n=0-4, R 3 is H, R 4 is H and R 5 is phenyl.
Claim 11
Dependent Claim
10 words
The compound of claim 7 wherein R 5 is phenyl.
References Cited (Backward Citations)
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