title: Stereochemistry of two new polyfunctionalized gem-dihalocyclopropanes.
abstract: The two new gem-dihalogenocyclopropanes (1'S,3R)-3-(2',2'-dichloro-1'-methylcyclopropyl)-6-oxoheptanoic acid, C(11)H(16)Cl(2)O(3), (2), and (1'S,3R)-3-(2',2'-dibromo-1'-methylcyclopropyl)-6-oxoheptanoic acid, C(11)H(16)Br(2)O(3), (3), are isostructural. Both present two stereogenic centers at C1' and C3. The absolute configuration was determined by X-ray methods. The cyclopropyl rings are unsymmetrical, the shortest bond being distal with respect to the alkyl-substituted C atom.
authors.affiliation: Département de Chimie, Faculté des Siences-Semlalia, BP 2390 Marrakech, Morocco.
authors.forename: Hossni
authors.initials: H
authors.lastname: Ziyat
authors.forename: My Youssef
authors.initials: MY
authors.lastname: Ait Itto
authors.forename: Mustapha
authors.initials: M
authors.lastname: Ait Ali
authors.forename: Abdellah
authors.initials: A
authors.lastname: Karim
authors.forename: Abdelkhalek
authors.initials: A
authors.lastname: Riahi
authors.forename: Jean-Claude
authors.initials: JC
authors.lastname: Daran
mesh_terms: D018360:Crystallography, X-Ray; D003521:Cyclopropanes / Q000138:chemical synthesis / Q000737:chemistry*; D006538:Heptanoic Acids / Q000138:chemical synthesis / Q000737:chemistry*; D006860:Hydrogen Bonding; D008958:Models, Molecular; D008968:Molecular Conformation; D011722:Pyrethrins / Q000138:chemical synthesis / Q000737:chemistry*
chemical_list: C454608:3-(2',2'-dibromo-1-methylcyclopropyl)-6-oxoheptanoic acid; C454607:3-(2',2'-dichloro-1'-methylcyclopropyl)-6-oxoheptanoic acid; D003521:Cyclopropanes; D006538:Heptanoic Acids; D011722:Pyrethrins