title: Efficient synthesis of stable phosphonate ylides and ‎phosphonate esters: reaction between activated acetylenes and triphenylphosphite in the presence of sulfonamide and heterocyclic NH-acids.
abstract: An efficient synthesis of stable phosphonate ylides and phosphonate esters is described via a ‎one-pot reaction between activated acetylenes and triphenylphosphite in the presence of sulfonamides and heterocyclic ‎NH-acids. Single X-ray diffraction analysis and NMR studies were used in characterizing the ylides and phosphonate ester products. Dynamic NMR studies performed on a phosphonate ylide allowed the calculation of the free energy barrier for the inter-conversion between the geometrical isomers (E) and (Z).
authors.affiliation: Faculty of Basic Science, Gonbad Institutes of Higher Education, P. O. Box 163, Gonbad, Iran. f_rostami_ch@yahoo.com
authors.forename: Faramarz Rostami
authors.initials: FR
authors.lastname: Charati
authors.forename: Malek Taher
authors.initials: MT
authors.lastname: Maghsoodlou
authors.forename: Sayyed Mostafa
authors.initials: SM
authors.lastname: Habibi-Khorassani
authors.forename: Nourallah
authors.initials: N
authors.lastname: Hazeri
authors.forename: Ali
authors.initials: A
authors.lastname: Ebrahimi
authors.forename: Zinatossadat
authors.initials: Z
authors.lastname: Hossaini
authors.forename: Pouneh
authors.initials: P
authors.lastname: Ebrahimi
authors.forename: Nariman
authors.initials: N
authors.lastname: Maleki
authors.forename: Sayyed Reza
authors.initials: SR
authors.lastname: Adhamdoust
authors.forename: Fatemeh Vasheghani
authors.initials: FV
authors.lastname: Farahani
authors.forename: Ghasem
authors.initials: G
authors.lastname: Marandi
authors.forename: Alexandre
authors.initials: A
authors.lastname: Sobolev
authors.forename: Mohamed
authors.initials: M
authors.lastname: Makha
mesh_terms: D000114:Acetylene / Q000737:chemistry*; D000143:Acids / Q000737:chemistry*; D063065:Organophosphonates / Q000138:chemical synthesis*; D017905:Phosphites / Q000737:chemistry*; D013449:Sulfonamides / Q000737:chemistry*
chemical_list: D000143:Acids; D063065:Organophosphonates; D017905:Phosphites; D013449:Sulfonamides; C013318:triphenyl phosphite; D000114:Acetylene