title: Enantioselective formal synthesis of (-)-englerin A via a Rh-catalyzed [4 + 3] cycloaddition reaction.
abstract: An enantioselective formal synthesis of (-)-englerin A (1) is reported. Key to the strategy is a Rh-catalyzed [4 + 3] cycloaddition reaction between furan 10 and diazo ester 11 that, following an intramolecular aldol condensation, produces the tricyclic scaffold of englerin. This strategy also provides a rapid, efficient, and stereoselective access to the biologically significant core motif of the guaiane sesquiterpenes.
authors.affiliation: Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093-0358, USA.
authors.forename: Jing
authors.initials: J
authors.lastname: Xu
authors.forename: Eduardo J E
authors.initials: EJ
authors.lastname: Caro-Diaz
authors.forename: Emmanuel A
authors.initials: EA
authors.lastname: Theodorakis
mesh_terms: D000972:Antineoplastic Agents, Phytogenic / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D002384:Catalysis; D003500:Cyclization; D005663:Furans / Q000737:chemistry*; D015394:Molecular Structure; D012238:Rhodium / Q000737:chemistry*; D045789:Sesquiterpenes, Guaiane / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D013237:Stereoisomerism
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D005663:Furans; D045789:Sesquiterpenes, Guaiane; C534971:englerin A; C551614:englerin B; D012238:Rhodium