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Enzymes in Organic Synthesis, 8. Synthesis of enantiomerically pure prostaglandin intermediates by enzymatic transesterification of (1S*,5R*,6R*,7R*)-(±)-7-hydroxy-6-hydroxymethyl-2-oxabicyclo[3.3.0]octan-3-one
✍ Scribed by Weidner, Judith ;Theil, Fritz ;Kunath, Annamarie ;Schick, Hans
- Publisher
- John Wiley and Sons
- Year
- 1991
- Tongue
- English
- Weight
- 271 KB
- Volume
- 1991
- Category
- Article
- ISSN
- 0947-3440
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✦ Synopsis
Abstract
Lipase Amano PS is a suitable biocatalyst for the highly regio‐ and enantioselective transesterification of the racemic prostaglandin building block (1__S__~*~,5__R__*,6__R__*,7__R__*)‐(±)‐7‐hydroxy‐6‐hydroxymethyl‐2‐oxabicyclo[3.3.0]octan‐3‐one (rac‐1) yielding (1__S__,5__R__,6__R__,7__R__)‐(−)‐6‐acetoxymethyl‐7‐hydroxy‐2‐oxabicyclo[3.3.0]octan‐3‐one (2) and the unreacted (1__R__,5__S__,6__S__,7__S__)‐(+)‐enantiomer ent‐1.
📜 SIMILAR VOLUMES
## Abstract By enzyme‐catalyzed intramolecular transesterification methyl (±)‐(3__R__\*,5__S__\*,6__E__)‐3,5‐dihydroxy‐7‐phenyl‐6‐heptenoate (__rac__‐4) can be enantioselectively converted into the δ‐lactone 5. An enantiomeric excess of 80% was obtained by Pancreatin in diethyl ether at ambient tem
Use of an Iodonium Ylide in the Synthesis of p-Nitrobenzyl (6R,7S) 3-Hydroxy-8-oxo-7-phenoxyacetamido-1-azabicyclo [4.2.0]octa-2-ene-2-carboxylate. -The title compound (IV), a key intermediate in the synthesis of carbacephalosporins, is prepared by Rh(II)-catalyzed cyclization of the iodonium ylide