title: Regioselective synthesis of trisubstituted 2,3-dihydrofurans from donor-acceptor cyclopropanes or from reaction of the Corey ylide with alpha-sulfenyl-, alpha-sulfinyl-, or alpha-sulfonylenones.
abstract: [reactions: see text] Regioselective synthesis of 2,4,5- or 3,4,5-trisubstituted 2,3-dihydrofurans has been realized by using donor-acceptor cyclopropanes or by a Corey ylide reaction with alpha-sulfenyl-, alpha-sulfinyl-, or alpha-sulfonylenones. The method allowed a straightforward synthesis of the natural product calyxolane B.
authors.affiliation: Dipartimento di Scienze Chimiche, Università degli studi di Cagliari, Cittadella Universitaria di Monserrato, S.S 554, Bivio per Sestu, I-09042 Monserrato (Cagliari), Italy.
authors.forename: Angela M
authors.initials: AM
authors.lastname: Bernard
authors.forename: Angelo
authors.initials: A
authors.lastname: Frongia
authors.forename: Pier P
authors.initials: PP
authors.lastname: Piras
authors.forename: Francesco
authors.initials: F
authors.lastname: Secci
authors.forename: Marco
authors.initials: M
authors.lastname: Spiga
mesh_terms: D003521:Cyclopropanes / Q000737:chemistry*; D005663:Furans / Q000138:chemical synthesis* / Q000737:chemistry; D015394:Molecular Structure; D010084:Oxidation-Reduction; D013237:Stereoisomerism; D013457:Sulfur Compounds / Q000737:chemistry*
chemical_list: D003521:Cyclopropanes; D005663:Furans; D013457:Sulfur Compounds; C073812:2,3-dihydrofuran