Substitution of α-azido ethers with Grignard reagents and its use in combinatorial chemistry
作者:Mukulesh Baruah、Mikael Bols
DOI:10.1039/b110428b
日期:2002.2.6
α-Azidobenzyl ethers were reacted with alkyl or arylGrignard reagents in toluene to produce α-alkylbenzyl or diarylmethyl ethers in 82â94% yield. α-Azidobenzyl ethers were also reacted with multicomponent Grignard reagents to produce libraries of α-alkylbenzyl ethers.
[EN] POLYURETHANE FOAM ADDITIVES TO IMPROVE FOAM ADHESION TO ORGANIC POLYMERS<br/>[FR] ADDITIFS DE MOUSSE DE POLYURÉTHANE POUR AMÉLIORER L'ADHÉRENCE DE LA MOUSSE À DES POLYMÈRES ORGANIQUES
申请人:EVONIK DEGUSSA GMBH
公开号:WO2020018087A1
公开(公告)日:2020-01-23
An additive composition for making polyurethane foam where the additive composition is defined as at least one compound selected from the following groups: a. Aromatic ethers of general formula R-(CH2)x-Z-(CH2)y-R' where R = substituted or unsubstituted aryl group; Z = O or R"-N with R" = Ci-C8 alkyl group, and preferentially methyl or benzyl; x = 0-3; y = 0-3; and R' = substituted or unsubstituted aryl group where the substituents are non- isocyanate reactive groups or a Ci-C8 alkyl group; b. Aromatic ethers of general formula R-O-Aryl-O-R' where R = C1-C6 hydrocarbon; R' = CrC6 hydrocarbon; and aryl = alkyl/aryl substituted or unsubstituted where the substituents are non-isocyanate reactive groups; c. Aromatic esters of general formula R-02C-Aryl-C02-R' where R = CrC6 hydrocarbon; R' = CrC6 hydrocarbon; and aryl = substituted or unsubstituted aryl group where the substituents are non-isocyanate reactive groups; and d. Substituted aromatic compounds of the general formula Rx-Aryl where R = Ci-C6 hydrocarbon; x = 1 -6; and aryl = substituted or unsubstituted aromatic derived from benzene, naphthalene, anthracene, or phenanthrene. A polyurethane composition and method for forming a polyurethane foam is also disclosed.
Direct Benzylic C(sp<sup>3</sup>)–O Coupling with Alcohol via Site-Selective C(sp<sup>3</sup>)–H Cleavage at Room Temperature through a Remote Directing Group-Enabled Radical Relay Strategy
作者:Fang Wang、Jiaming Chen、Xiaoqi Jia、Dailin Zhuang、Zhenyang Wan、Lifang Ma、Ziyuan Li
DOI:10.1021/acs.joc.2c00884
日期:2022.8.19
terminal oxidant, a remote directing group-enabled radical relay strategy for benzylic direct C(sp3)–H alkoxylation with alcohols at room temperature is developed. Satisfactory site-selectivity, chemoselectivity, and reaction scope are achieved under simple and mildconditions, and no ligand or additive is required. Mechanistic studies, ready conversions of the directing group, and other benzylic functionalizations