Enantioselective formal synthesis of tridemethylisovelleral

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Abstract

A simple and efficient synthetic route to the bicyclic alpha,beta-unsaturated beta-keto ester methyl (3aS,7aS)-6-oxo-2,3,3a,6,7,7ahexahydro-1H-indene-5-carboxylate, a versatile intermediate in the synthesis of biologically active unsaturated 1,4-dialdehydes, is described. The synthesis includes a chirality introducing nonenzymatic asymmetric desymmetrization (ADS) reaction of a cyclic nieso-anhydride 4 and a modified Hofmann method for preparing exocyclic dienes. The ester was synthesized in a moderate overall yield (19%) from 6 and with an excellent enantioselectivity (> 90%).

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Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Organisk kemi
Originalspråkengelska
Sidor (från-till)635-638
TidskriftTetrahedron Letters
Volym48
Utgivningsnummer4
StatusPublished - 2007
PublikationskategoriForskning
Peer review utfördJa