Design, Synthesis, Structure, and Dehydrogenation Reactivity of a Water-Soluble <i>o</i>-Iodoxybenzoic Acid Derivative Bearing a Trimethylammonium Group
作者:Li-Qian Cui、Zhi-Lei Dong、Kai Liu、Chi Zhang
DOI:10.1021/ol202777h
日期:2011.12.16
5-Trimethylammonio-1,3-dioxo-1,3-dihydro-1λ5-benzo[d][1,2]iodoxol-1-ol anion (AIBX 1a), an o-iodoxybenzoic acid (IBX) derivative having the trimethylammonium moiety on its phenyl ring, possesses very good solubility in water and distinct oxidative properties from IBX, which is demonstrated in the oxidation of various β-keto esters to the corresponding dehydrogenated products using water as cosolvent
THERMAL RECORDING MATERIAL CONTAINING TRIS(2-METHYL- 4-HYDROXY-5-t-BUTYLPHENYL)BUTANE
申请人:Tobita Etsuo
公开号:US20100249466A1
公开(公告)日:2010-09-30
A thermal recording material of the invention contains, as a storability improver, tris(2-methyl-4-hydroxy-5-t-butylphenyl)butane trapping and containing water and/or methanol and having a crystal structure that shows a maximum X-ray diffraction peak at a diffraction angle 2θ of 6.58° according to X-ray diffraction measurement using an X ray having a wavelength of a Cu—Kα line. The recording material has improved heat resistance in non-printing sections while maintaining the moisture-and-heat resistance in printing sections. The thermal recording material of the invention has a thermal-recording layer that contains the tris(2-methyl-4-hydroxy-5-t-butylphenyl)butane in an amount of preferably 0.1 to 15% by mass with respect to the thermal-recording layer. The amount of the water and/or methanol trapped and contained in the tris(2-methyl-4-hydroxy-5-t-butylphenyl)butane is preferably 0.1 to 10% by mass in total.
Discovery of carbamate-based salicylic acid derivatives as novel cholinesterase inhibitor
作者:Yuying Wang、Lin Long、Quanwei Yu、Honghua Zhang、Xuelin Li、Linsheng Zhuo、Shuzhi Wang、Zhen Wang
DOI:10.1016/j.molstruc.2022.134804
日期:2023.3
Cholinesterase inhibition is a clinically validated therapeutic approach for treatment of Alzheimer's disease (AD). A series of salicylic acid-based ChE inhibitors bearing carbamate group were designed and synthesized based on the principle of active substructure splicing. Among them, compounds 3l (IC50, eqBChE = 1.06 µM, IC50, eeAChE = 2.08 µM) and 3t (IC50, eqBChE = 0.82 µM, IC50, eeAChE = 2.38 µM)
Access to Naphthoic Acid Derivatives through an Oxabenzonorbornadiene Rearrangement
作者:Daniel Lücke、Alexander S. Campbell、Martin Petzold、Richmond Sarpong
DOI:10.1021/acs.orglett.3c02823
日期:2023.10.13
Herein, the synthesis of 1-hydroxy-2-naphthoic acid esters through an unexpected Lewis-acid-mediated 1,2-acyl shift of oxabenzonorbornadienes is reported. Using this methodology, novel substitution patterns for 1-hydroxy-2-naphtoic acid esters can be obtained. A mechanistic proposal and rationale for this transformation, the products of which had been previously incorrectly characterized, is given
CURABLE ORGANOPOLYSILOXANE RELEASE AGENT COMPOSITION FOR THERMAL PAPER, THERMAL PAPER, AND THERMAL RECORDING LABEL SHEET
申请人:Dow Toray Co., Ltd.
公开号:EP3719096A1
公开(公告)日:2020-10-07
[PROBLEM]
To provide a curable organopolysiloxane releasing agent composition for a thermally sensitive paper wherein a releasing layer that has high adhesion and a good peeling force that is cured quickly at a low temperature without producing curing failures when coated on a thermally sensitive coloring layer, and that is resistant to gellification at room temperature, and that has superior ease of handling, can be formed, and relates to a thermally sensitive paper and a thermally sensitive printing label sheet that uses the same, etc.
[MEANS FOR RESOLUTION]
The use of a curable organopolysiloxane releasing agent composition for a thermally sensitive paper that includes: (A) one or more types of organopolysiloxanes having an alkenyl group with a number of carbon atoms between 4 and 12, where the inclusion proportion of the vinyl (CH2 = CH-) within the alkenyl group is between 0.5 and 3.0 mass %; (B) an organohydrodiene polysiloxane having at least two silicon-bonded hydrogen atoms (Si-H) in a single molecule; (C) a hydrosilylation reaction catalyst; and (D) a hydrosilylation reaction inhibiting agent, wherein: the silicon atom-bonded hydrogen atoms within the (B) component is in an amount in a range of between 1.0 and 4.0 moles per one mole of carbon-carbon double bonds in the (A) component.