76542-21-7Relevant academic research and scientific papers
An eco-friendly asymmetric organocatalytic conjugate addition of malonates to α,β-unsaturated aldehydes: Application on the synthesis of chiral indoles
Feu, Karla Santos,Deobald, Anna Maria,Narayanaperumal, Senthil,Correa, Arlene G.,Weber Paixao, Marcio
, p. 5917 - 5922 (2013)
The asymmetric Michael addition of malonates to α,β-unsaturated aldehydes using a modified Jorgensen-Hayashi organocatalyst in EtOH:brine solvent media is reported. The procedure proceeds smoothly to afford the corresponding Michael adducts in good yields with excellent enantioselectivities. The resulting Michael adducts represent excellent building blocks for the synthesis of chiral indoles. The asymmetric Michael reaction using a modified Jorgensen-Hayashi organocatalyst in EtOH:brine solvent media is reported. This procedure afforded the corresponding Michael adducts in good yields and with excellent enantioselectivities. The resulting adducts were further used as chiral building blocks for the synthesis of indoles. Copyright
DIACETYLENE DERIVATIVE
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Paragraph 0069, (2019/12/28)
PROBLEM TO BE SOLVED: To provide a novel diacetylene derivative in which the birefringence and the dielectric anisotropy are comparatively large and which is chemically stable. SOLUTION: A diacetylene derivative of this invention is chemically and thermal
Development of novel bistolane-based liquid crystalline molecules with an alkylsulfanyl group for highly birefringent materials
Arakawa, Yuki,Kang, Sungmin,Tsuji, Hideto,Watanabe, Junji,Konishi, Gen-Ichi
, p. 16568 - 16574 (2016/02/23)
In order to generate high-birefringence liquid crystal (LC) materials, the introduction of highly polarisable groups into the terminal positions of the mesogen represents one of the most important design strategies. Even though the alkylsulfanyl group is
Assembly of thioether-containing rod-like liquid crystalline materials assisted by hydrogen-bonding terminal carboxyl groups
Arakawa, Yuki,Kang, Sungmin,Watanabe, Junji,Konishi, Gen-Ichi
, p. 8056 - 8062 (2015/01/30)
We designed a hydrogen-bonding tolane-based molecule with terminal carboxyl and alkylsulfanyl groups in an effort to realize thioether-containing rod-like liquid crystalline materials. The molecule successfully exhibits a stable enantiotropic mesophase, i
High birefringence nematic liquid crystals for display and telecom applications
Catanescu, Carmen Otilia,Chien,Wu, Shin-Tson
, p. 93/[1135]-102/[1144] (2007/10/03)
Several compounds with high birefringence and, having tolane structure were synthesized. For a high polarizability, isothiocyanato (NCS) terminal group was introduced. Another goal of this study was reduction of melting point and smectic phases by introduction of fluorine as lateral substituent. The transition temperatures for all the synthesized compounds and the refractive and dielectric indices for one of the compounds have been determined. Electro-optic (EO) measurements were also performed.
Synthesis and fluorescence enhancement of oligophenylene-substituted calix[4]arene assemblies
Wong, Man Shing,Zhang, Xiao Ling,Chen, Dong Zhong,Cheung, Wai Ho
, p. 138 - 139 (2007/10/03)
Tetra-oligophenylene substituted calix[4]arene assemblies containing up to three phenylene units have been synthesized by a convergent approach using Suzuki cross-coupling and their optical properties were investigated and compared with the corresponding
Anilide derivative, production and use thereof
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, (2008/06/13)
This invention is to provide a compound of the formula: wherein R1is an optionally substituted 5- to 6-membered ring; the ring A is an optionally substituted 6- to 7-membered ring; the ring B is an optionally substituted benzene ring; n is an integer of 1 or 2; Z is a chemical bond or a divalent group; R2is (1) an optionally substituted amino group in which a nitrogen atom may form a quaternary ammonium, (2) an optionally substituted nitrogen-containing heterocyclic ring group which may contain a sulfur atom or an oxygen atom as ring constituting atoms and wherein a nitrogen atom may form a quaternary ammonium, (3) a group binding through a sulfur atom or (4) a group of the formula: ?wherein k is 0 or 1, and when k is 0, a phosphorus atom may form a phosphonium; and R5and R6are independently an optionally substituted hydrocarbon group, an optionally substituted hydroxy group or an optionally substituted amino group, and R5and R6may bind to each other to form a cyclic group together with the adjacent phosphorus atom, or a salt thereof , which is useful for antagonizing CCR5 and also for the prevention and treatment of infectious disease of HIV.
