38274-86-1Relevant articles and documents
Metal-free catalytic hydrogenation of imines with recyclable [2.2]paracyclophane-derived frustrated lewis pairs catalysts
Wang, Guan,Chen, Cheng,Du, Tieqi,Zhong, Weihui
, p. 1747 - 1752 (2014/06/09)
A series of [2.2]paracyclophane-derived frustrated Lewis pairs (FLPs) with reversible, metal-free hydrogen activation was synthesized and successfully applied in the hydrogenation of imines in moderate to good yields. The high stability of the novel FLP system enables effective recycling of the metal-free catalysts. This reaction could also be compatible with a larger scale and developed into a pharmaceutical synthesis of cinacalcet {(R)-N-[1-(1-naphthyl) ethyl]-3-[3-(trifluoromethyl)phenyl]propan-1-amine} without heavy metal residues.
Low-temperature photolysis of 2,2-paracyclophane and 2,2-paracyclophan-1-ene
Nurmukhametov,Ryzhakova,Gromov,Pebalk,Kardash
, p. 1002 - 1006 (2007/10/03)
Photolysis of 2,2-paracyclophan (I) and 2,2-paracyclophan-1-ene (II) at 77 K in tetrahydrofuran (THF) and heptane matrices is studied by the luminescence spectroscopy and spectrophotometry techniques. The low-temperature photolysis of I and II solutions produces, as the main fluorescing products, the trans isomer of alkylated stilbene (in the THF matrix) and alkylphenanthrene (in heptane) along with radicals. On prolonged exposures, both products are simultaneously accumulated in the solutions. A complex spectrum of the fluorescence of I and II in heptane solutions in the region from 460 to 500 nm is explained by the superposition of the phenanthrene derivative phosphorescence on emission of radicals. The fraction of the molecules converted to alkylstilbene is evaluated from the absorption spectra of THF solutions, these being equal to -3 and -5% for I and II, respectively. A mechanism of the photochemical process is considered. A conclusion is made that the polarity of a solvent influences the structure of compounds being formed.
Cyclophanes, 26 On the Functionalisation of the Ethano Bridges of Paracyclophane
Hopf, Henning,Psiorz, Manfred
, p. 1836 - 1844 (2007/10/02)
An improved procedure for the syntheses of paracyclophan-1-ene (4) is described.Addition of halogen to this olefin, subsequent dehydrohalogenation, and again addition and elimination provides a wide range of bridge-halogenated cyclophanes.The derivat