title: Access to [6.4.0]carbocyclic systems by tandem metathesis of dienynes. A step toward the synthesis of a PreD3-D3 transition state analogue.
abstract: [reaction: see text] A new approach to the synthesis of linearly fused 6-8-6 tricarbocyclic systems, tandem ring-closing metathesis of dienynes, allows access to compounds with a carbon framework analogous to the proposed transition state of the isomerization of previtamin D(3) to vitamin D(3).
authors.affiliation: Departamento de Química Orgánica e Unidade Asociada ó C.S.I.C., Facultade de Química, Universidade de Santiago, 15706 Santiago de Compostela, Spain.
authors.forename: E M
authors.initials: EM
authors.lastname: Codesido
authors.forename: L
authors.initials: L
authors.lastname: Castedo
authors.forename: J R
authors.initials: JR
authors.lastname: Granja
mesh_terms: D002762:Cholecalciferol / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000737:chemistry*; D006241:Haptens / Q000737:chemistry; D010777:Photochemistry; D013329:Structure-Activity Relationship
chemical_list: D006241:Haptens; D002762:Cholecalciferol; C025168:previtamin D(3)