Facile construction of substituted bicyclo [n.3.1] alkanones and the synthesis of a 12-membered dilactone via a new functionalized pentadienoic ester
摘要:
4-Hydroxymethyl-2,4-pentadienoate was effectively synthesized and used for a synthetic entry to keto bridged bicyclo [n.3.1] alkanones and for the synthesis of a 12-membered macrodilide characterized by two trans double bonds, part of two vinylogous alpha-methylene lactone units.
Facile construction of substituted bicyclo [n.3.1] alkanones and the synthesis of a 12-membered dilactone via a new functionalized pentadienoic ester
摘要:
4-Hydroxymethyl-2,4-pentadienoate was effectively synthesized and used for a synthetic entry to keto bridged bicyclo [n.3.1] alkanones and for the synthesis of a 12-membered macrodilide characterized by two trans double bonds, part of two vinylogous alpha-methylene lactone units.
Baker's yeast mediated biohydrogenation of sulphur-functionalised methacrolein derivatives. Stereochemical aspects of the reaction and preparation of the two enantiomers of useful C4 bifunctional chiral synthons
作者:Stefano Serra、Claudio Fuganti
DOI:10.1016/s0957-4166(01)00383-4
日期:2001.8
baker's yeast mediated reduction of sulphur-functionalised methacroleins 11, 15 and 18 leads to the preparation of the bifunctional methyl branched C4 chiral synthons 6 and 7. The stereochemicalaspects of the biohydrogenation have been investigated. Both the oxidation state of sulphur and the isomeric position of the double bond affected the enantioselectivity of the reduction strongly, thus, offering
4-Hydroxymethyl-2,4-pentadienoate was effectively synthesized and used for a synthetic entry to keto bridged bicyclo [n.3.1] alkanones and for the synthesis of a 12-membered macrodilide characterized by two trans double bonds, part of two vinylogous alpha-methylene lactone units.