title: Synthesis of gamma- and delta-lactones from 1alpha-hydroxy-5,6-trans-vitamin D3 by ring-closing metathesis route and their reduction with metal hydrides.
abstract: New synthetic pathway towards 19-functionalized derivatives of 1alpha-hydroxy-5,6-trans-vitamin D3 was described. Ring-closing metathesis (RCM) of 1alpha-hydroxy-5,6-trans-vitamin D3 1-omega-alkenoates was a key-step. Hydride reduction of resulting lactones led to the new vitamin D3 analogues.
authors.affiliation: Institute of Chemistry, University of Bialystok, Al. Pilsudskiego 11/4, 15-443 Bialystok, Poland.
authors.forename: Agnieszka
authors.initials: A
authors.lastname: Wojtkielewicz
authors.forename: Jacek W
authors.initials: JW
authors.lastname: Morzycki
mesh_terms: D003500:Cyclization; D006887:Hydroxycholecalciferols / Q000737:chemistry*; D007783:Lactones / Q000138:chemical synthesis*; D009682:Magnetic Resonance Spectroscopy; D008670:Metals / Q000737:chemistry*; D021241:Spectrometry, Mass, Electrospray Ionization; D013055:Spectrophotometry, Infrared
chemical_list: D006887:Hydroxycholecalciferols; D007783:Lactones; D008670:Metals