2-Alkoxyarenol-derived orthoquinols in carbon–oxygen, carbon–nitrogen and carbon–carbon bond-forming reactions
摘要:
Silylated oxygen- and nitrogen-tethered orthoquinol acetates, generated by phenyliodine(III) diacetoxy-mediated oxidative acetoxylation of 2-alkoxyphenols in CH2Cl2 can be used to furnish regioselectively benzannulated heterocycles. Oxidative activation of 2-alkoxynaphthols with non-nucleophilic phenyliodine(III) bis(trifluoroacetoxy) in the presence of carbon nucleophiles, including oxidation sensitive silyl enol ethers, constitute a potentially valuable route to naturally occurring vicinally oxygenated benz[a]anthracene motifs. (C) 2000 Elsevier Science Ltd. All rights reserved.
10A-AZALIDE COMPOUND CROSSLINKED AT 10A- AND 12-POSITIONS
申请人:Sugimoto Tomohiro
公开号:US20110237784A1
公开(公告)日:2011-09-29
A novel 10a-azalide compound crosslinked at the 10a- and 12-positions, which is represented by the following formula, and is effective on even
Hemophilus influenzae
, or erythromycin resistant bacteria (e.g., resistant pneumococci and streptococci).
Provided are a novel resin and a precursor thereof that are excellent in thermal decomposability and solubility in a solvent. The resin is obtained by subjecting, to an acidic treatment, a monoalkylnaphthalene formaldehyde resin that is obtained by reacting a compound represented by the following formula (1), wherein R
1
represents an alkyl group having 1 to 4 carbon atoms, and formaldehyde in the presence of a catalyst.
NOVEL COMPOUND AND ORGANIC ELECTROLUMINESCENT ELEMENT PRODUCED USING SAME
申请人:IDEMITSU KOSAN CO., LTD.
公开号:US20160172604A1
公开(公告)日:2016-06-16
A compound represented by the following formula (1): wherein in the formula, L
1
is a single bond or a linking group, A is a group represented by the following formula (A), B is a group represented by the following formula (B), m is an integer of 1 to 3, and n is an integer of 1 to 4.
EPOXY RESIN, PRODUCTION METHOD THEREOF, EPOXY RESIN COMPOSITION, AND CURED PRODUCT
申请人:Mitsubishi Gas Chemical Company, Inc.
公开号:US20150322308A1
公开(公告)日:2015-11-12
An epoxy resin obtained through the following steps (a) to (d):
(a): a step of reacting a compound represented by formula (1) and/or (2) with formaldehyde in the presence of a catalyst to thereby provide an aromatic hydrocarbon-formaldehyde resin;
(b): a step of treating the aromatic hydrocarbon-formaldehyde resin obtained in the step (a) with an acidic catalyst and water to thereby provide an acid-treated resin;
(c): a step of treating the acid-treated resin obtained in the step (b) with an acidic catalyst and a compound represented by formula (3) to thereby provide a modified resin; and
(d): a step of reacting the modified resin obtained in the step (c) with epihalohydrin to thereby provide an epoxy resin.
AROMATIC HYDROCARBON FORMALDEHYDE RESIN, MODIFIED AROMATIC HYDROCARBON FORMALDEHYDE RESIN, AND EPOXY RESIN, AND METHOD FOR PRODUCING THESE
申请人:MITSUBISHI GAS CHEMICAL COMPANY, INC.
公开号:US20160130383A1
公开(公告)日:2016-05-12
There is provided an aromatic hydrocarbon formaldehyde resin obtained by reacting an aromatic hydrocarbon compound (A) represented by the following formula (1) with formaldehyde (B) in the presence of an acidic catalyst.
wherein R represents an organic group having 1 to 10 carbon atoms; l represents an integer of 0 to 2, and m and n represent integers satisfying 1≦m+n≦10, m≧0 and n≧1.