Oligomeric compounds

Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Ester doai

Reexamination Certificate

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C560S185000, C424S439000

Reexamination Certificate

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07947736

ABSTRACT:
Method for the synthesis of a compound of formula H(OCH[CH3]CH2C[O])3—O-A-O—R wherein A is the residue of 1,3-butandiol and R is H or H(OCH[CH3]CH2C[O]3—. The method comprises reacting a cyclic oligomer of (R)-3-hydroxybutyrate consisting of (R)-3-hydroxybutyrate moieties with a 1,3-butandiol in an organic solvent in the presence ofCandida antarcticalipase type B in a furan or pyran solvent.

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