[EN] NONLINEAR OPTICAL COMPOUNDS AND METHODS FOR THEIR PREPARATION<br/>[FR] COMPOSES OPTIQUES NON LINEAIRES ET PROCEDES DE FABRICATION
申请人:UNIV WASHINGTON
公开号:WO2004065384A1
公开(公告)日:2004-08-05
Nonlinear optically active compounds, methods for making nonlinear optically active compounds, compounds useful for making nonlinear optically active compounds, methods for making compounds useful for making nonlinear optically active compounds, macrostructures tha tinclude nonlinear optically active components, and devices including the nonlinear optically active compounds and the macrostructures.
A novel anionic heptamethine cyanine (HMC) dye with two trifluoromethylgroups that selectively absorb near-infrared light is synthesized. When contrasted with previously studied anionic HMC dyes with substituents such as methyl, phenyl, and pentafluorophenyl groups, the trifluoromethylated dye displays a red-shifted maximum absorption wavelength (for instance, 948 nm in CH2Cl2) along with enhanced
Diketo Compounds with (Trifluoromethyl)trimethylsilane: Double Nucleophilic Trifluoromethylation Reactions
作者:Rajendra P. Singh、Jeffry M. Leitch、Brendan Twamley、Jean'ne M. Shreeve
DOI:10.1021/jo0057304
日期:2001.2.1
Reactions of various diketo compounds with (trifluoromethyl)trimethylsilane (Me3SiCF3) in the presence of catalytic amounts of cesium fluoride have been studied. gamma -Ketoesters, CH3COCH2CH2CH2R (R = Et, Bu), were reacted with 2 equiv of Me3SiCF3 at room temperature to give CH3C(OH)(CF3)CH2CH2COCF3 in good yield after hydrolysis. alpha -Diketones, R1COCOR2 (R-1 = R-2 = Ph; R-1 = Ph, R-2 = Me; R-1 = R-2 = Me; R-1 = Me, R-2 = Et), when reacted with Me3SiCF3, formed 1:1 or 1:2 addition products depending on the reaction conditions and stoichiometry used. Reactions of diones CH3COXCOCH3 (X = -CH2CH2-, -C6H4C6H4-, -CH2-) with Me3SiCF3 also led to the formation of the mono- or diaddition products depending on reaction conditions. With various kinds of substituted arylglyoxals, 2 equiv of Me3SiCF3 produced monoaddition products in 70-75% yield and diaddition products in 5-10% yield. One of the monoalcohols and two of the diols have been characterized by single-crystal X-ray analysis, and the presence of inter- and intramolecular hydrogen bonding has been confirmed.