title: Rh(I)-catalyzed intramolecular [3 + 2] cycloaddition of trans-vinylcyclopropane-enes.
abstract: Vinylcyclopropane (VCP) has been well applied as a five-carbon component, rather than a three-carbon component, in transition-metal catalyzed cycloadditions. Here we demonstrate a Rh(I)-catalyzed [3 + 2] reaction of trans-VCP-enes, where VCP acts as a three-carbon synthon to furnish five-membered carbocycles. This novel cycloaddition is efficient in generating bicyclic cyclopentanes in good yields from simple and easily prepared substrates. When cis-VCP-ene is used as the substrate, VCP acts as a five-carbon unit to give a [5 + 2] cycloadduct. Rationalization of the [3 + 2] and [5 + 2] cycloadditions of VCP-enes has been proposed.
authors.affiliation: Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Jiao
authors.forename: Siyu
authors.initials: S
authors.lastname: Ye
authors.forename: Zhi-Xiang
authors.initials: ZX
authors.lastname: Yu
mesh_terms: D001643:Bridged Bicyclo Compounds / Q000138:chemical synthesis*; D002384:Catalysis; D003500:Cyclization; D034242:Cyclooctanes / Q000138:chemical synthesis* / Q000737:chemistry; D003521:Cyclopropanes / Q000737:chemistry*; D007659:Ketones / Q000138:chemical synthesis* / Q000737:chemistry; D012238:Rhodium / Q000737:chemistry; D014753:Vinyl Compounds / Q000138:chemical synthesis / Q000737:chemistry*
chemical_list: D001643:Bridged Bicyclo Compounds; D034242:Cyclooctanes; D003521:Cyclopropanes; D007659:Ketones; D014753:Vinyl Compounds; C044494:cyclooctanone; D012238:Rhodium