| 摘要 |
Compounds of formula I (I), wherein R1 is C1-C4alkyl,phenyl or benzyl, R2 is C1-C4alkyl,phenyl or benzyl, a is 0, 1 or 2, R3 is linear or branched unsubstituted or OH-substituted C1-C12alkylene or is phenylene, X is -O-, -S- or -NR6, wherein R6 is H, C1-C4alkyl or -CO-R5-OH, b is 0,or b is an integer from 1 to 6 and R4 is linear or branched unsubstituted or OH-substituted C1-C12alkylene, Y is -O-, -S- or -NR7, wherein R7 is H or C1-C4alkyl, R5 is the divalent radical, diminished by the -CO-O group, of a lactone having a total of 4 to 7 ring members and containing at least one chiral carbon atom and corresponding predominantly to an optically active enantiomeric form, and e is an integer from 1 to 10. These compounds are suitable for the preparation of stationary phases for the chromatographic separation of chiral compounds.
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