The Board of Governors for Higher Education, State of Rhode Island and

The Board of Governors for Higher Education

Da-Ming Gou

Ching-Shih Chen

Yeuk-Chuen Liu

Woan-Ru Shieh

(2R,3S)- and (2S,3R)-enantiomers of trans-.beta.-phenylglycidic esters, prepared by lipase-mediated enantioselective transesterification, are used for the synthesis of the taxol C-13 side chain with good yield.

Chemoenzymatic synthesis of the taxol C-13 side chain N-benzolyl-

Two types of structural analogues of D-myo-inositol 1,4,5-trisphosphate [Ins(1,4,5)P.sub.4 ] are prepared by a chemo-enzymatic route. These 6-O-substituted analogues retain the biological activity of Ins(1,4,5)P.sub.3 and are able to elicit Ca.sup.2+ release from porcine brain microsomes. Moreover, these analogues allow the preparation of Ins(1,4,5)P.sub.3 -based immunogens and affinity matrix which are successfully applied to the preparation and purification of antibodies against Ins(1,4,5)P.sub.3. These antibodies display discriminative affinity toward Ins(1,4,5)P.sub.3, and provide a useful tool to study intracellular Ca.sup.2+ mobilization.

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Kingston, RI, United States of America

Da-Ming Gou