62890-98-6Relevant academic research and scientific papers
Copper-catalyzed difluoromethylation of β,γ-unsaturated carboxylic acids: An efficient allylic difluoromethylation
He, Zhengbiao,Hu, Mingyou,Luo, Tao,Li, Lingchun,Hu, Jinbo
supporting information, p. 11545 - 11547 (2013/01/15)
Not one but two! A new strategy for the regiospecific construction of compounds with allylic CF2H groups has been developed. The decarboxylative (phenylsulfonyl)difluoromethylation of β,γ- unsaturated carboxylic acids is catalyzed by a Lewis acid (CuCl 2·2 H2O), and the resulting product easily undergoes desulfonylation. Copyright
CHIRAL PHOSPHORUS COMPOUNDS
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Page/Page column 20, (2008/12/04)
The present invention provides P-chiral compounds of general formula (II) and (III): wherein at least one of R21, R25, R26 and R30 is independently selected from C1-4 alkyl, CF3, C1-4 alkoxy, phenyl and benzyloxy and the remaining substituents selected from R21, R25, R26 and R30 are hydrogen; at least one of R22, R24, R27 and R29 are independently selected from C1-4 alkyl, CF3, C1-4 alkoxy, phenyl and benzyloxy and the remaining substituents selected from R22, R24, R27 and R29 are hydrogen; and R23 and R28 are independently selected from hydrogen, C1-4 alkyl, CF3, C1-4 alkoxy, phenyl and benzyloxy; Formula (III): wherein at least one of R21, R25, R26 and R30 is independently selected from phenyl and benzyloxy and the remaining substituents selected from R21, R25, R26 and R30 are hydrogen; and R22, R23, R24, R27, R28 and R29 are independently selected from hydrogen, C1-4 alkyl, CF3, C1-4 alkoxy, phenyl and benzyloxy.wherein at least one of R21, R25, R26 and R30 is independently selected from phenyl and benzyloxy and the remaining substituents selected from R21, R25, R26 and R30 are hydrogen; and R22, R23, R24, R27, R28 and R29 are independently selected from hydrogen, C1-4 alkyl, CF3, C1-4 alkoxy, phenyl and benzyloxy.
Synthesis, X-ray structure analysis and topochemical photopolymerization of substituted 1,6-bis(2,5-dimethoxyphenyl)hexa-2,4-diynes
Irngartinger, Hermann,Skipinski, Markus
, p. 917 - 922 (2007/10/03)
The 1,6-bis(2,5-dimethoxyphenyl)hexa-2,4-diynes 4a-c were obtained from the corresponding 2,5-dimethoxybenzenes 1 by bromination followed by a copper-catalyzed Grignard reaction with 3-bromoprop-1-yne. Catalyzed coupling of the resulting 3-(2,5-dimethoxyphenyl)prop-1-ynes 3 under Hay conditions gave the hexa-2,4-diynes 4a-c in good yields. The molecular structures of the diynes 4a and 4b were determined by X-ray diffraction analysis. In each crystal structure, an unusual 1,6-synperiplanar conformation of the hexa-2,4- diyne unit is observed, with the 1,6-diphenyl substituents arranged in a coplanar orientation. According to the crystal structure data obtained, irradiation of diynes 4a and 4b afforded the deeply-colored, highly-ordered polymers 5a and 5b under topochemical control. Oxidation of 4a and 4b with cerium(IV) ammonium nitrate gave the corresponding 1,6-bis(2,5- dimethoxyphenyl)hexa-2,4-diyne-1,6-diones 6a and 6b.
Phosphororganische Verbindungen 106. Die Synthese Optisch Aktiver Tertiaerer Phosphine und Phosphinoxide mit Ortho-Substituierten Arylliganden
Horner, L.,Simons, G.
, p. 77 - 90 (2007/10/02)
Compounds of the type C6H5Y (Y=OR, -NMe2), are lithiated with n-butyllithium (n-BuLi) in the ortho-position according (1) and transformed by special reactions to compounds of the type I and II. The representatives 7-22 of the type I with Y=OR ar
