5445-51-2Relevant articles and documents
Selective reactions of 1,1-cycloalkanedicarboxylic acids with SF4. a route to 1,1-bis(trifluoromethyl)cycloalkanes, 1-fluoroformyl-1-(trifluoromethyl)cycloalkanes and 1-(trifluoromethyl)-1-cycloalkanecarboxylic acids
Dmowski, Wojciech,Wolniewicz, Adam
, p. 141 - 146 (2007/10/03)
Six-, five-, four- and three-membered 1,1-cycloalkanedicarboxylic acid (2a-d) were synthesized by alkaline hydrolysis of the corresponding diesters (1a-d) and the reactions of the formers with SF4 were investigated. 1,1-Bis(trifluoromethyl)cycloalkanes (3a-d) were the products of the reactions conducted at 120-150°C while at 30°C 1-fluoroformyl-1-(trifluoromethyl)cycloalkanes (4a-d) were exclusively formed. The latter were isolated as pure compounds or converted in situ into 1-(trifluoromethyl)-1-cycloalkanecarboxylic acids (5a-d).
ANALYSE STRUCTURALE EN SERIE CYCLOBUTANIQUE. Partie 1. Derives monosubstitues et gem disubstitues du cyclobutane
Karimine, Mohamed,Galsomias, Jacqueline,Lere-Porte, Jean-Pierre,Petrissans, Jean
, p. 321 - 332 (2007/10/02)
Methylene bending mode analysis of some cyclobutane-d2 molecules reveals that in the dissolved state (solvent CCl4), bromocyclobutane occurs exclusively in a pseudo-equatorial form, whereas, under the same conditions, cyclobutanol and 1-bromocyclobutane carbonitrile exist both in pseudo-axial and pseudo-equatorial conformations.NMR spectroscopy confirms the results obtained for bromocyclobutane and leads to the conclusion that the pseudo-equatorial conformer is predominant in the case of cyclobutanol as well as in that of cyclobutane carbonitrile.A theoretical study of cyclobutanol in the gaseous state by the P.C.I.L.O. method gives results which are consistent with a pseudo-equatorial conformer.