title: Low-valent titanium-mediated cyclopropanation of vinylogous esters.
abstract: [reaction: see text] Inter- and intramolecular titanium-mediated cyclopropanation reactions of vinylogous esters are reported. Comparison between the Kulinkovich cyclopropanation of esters and vinylogous esters provides mechanistic insight regarding reaction variables such as reaction temperature, solvents, and a Lewis acid additive.
authors.affiliation: Department of Chemistry, Wayne State University, 5101 Cass Ave., Detroit, Michigan 48202, USA.
authors.forename: Nikolai
authors.initials: N
authors.lastname: Masalov
authors.forename: Wei
authors.initials: W
authors.lastname: Feng
authors.forename: Jin Kun
authors.initials: JK
authors.lastname: Cha
mesh_terms: D002384:Catalysis; D003500:Cyclization; D003521:Cyclopropanes / Q000737:chemistry*; D004952:Esters / Q000737:chemistry; D007202:Indicators and Reagents; D015394:Molecular Structure; D014025:Titanium / Q000737:chemistry*; D014753:Vinyl Compounds / Q000737:chemistry*
chemical_list: D003521:Cyclopropanes; D004952:Esters; D007202:Indicators and Reagents; D014753:Vinyl Compounds; D014025:Titanium