An eco-friendly Co(OAc)2-catalyzed aerobic oxidation of 4-benzylphenols into 4-hydroxybenzophenones
作者:Jian-Gang Huang、Ying Guo、Jian-An Jiang、Hong-Wei Liu、Ya-Fei Ji
DOI:10.1007/s11164-014-1801-8
日期:2015.10
An undecorated Co(OAc)2-catalyzed aerobic oxidation system has been reported that enables direct transformation of 4-benzylphenols into the corresponding 4-hydroxybenzophenones. The procedure is especially suitable for electron-withdrawing group-containing substrates, which are commonly inefficient to conduct this category of oxidation. Based on well-defined p-benzoquinone methides and the confirmed ethereal intermediate, a plausible mechanism was depicted.
[EN] HIV INTEGRASE INHIBITORS<br/>[FR] INHIBITEURS DE VIH INTEGRASE
申请人:MERCK & CO., INC.
公开号:WO1999062520A1
公开(公告)日:1999-12-09
(EN) Certain six-membered aromatic and heteroaromatic-dioxo-butyric acid derivatives are described as inhibitors of HIV integrase and inhibitors of HIV replication. These compounds are useful in the prevention or treatment of infection by HIV and the treatment of AIDS, either as compounds, pharmaceutically acceptable salts, pharmaceutical composition ingredients, whether or not in combination with other antivirals, immunomodulators, antibiotics or vaccines. Methods of treating AIDS and methods of preventing or treating infection by HIV are also described.(FR) Cette invention a trait à certains dérivés d'acide dioxo-butyrique à 6 chaînons, aromatique et hétéro-aromatique, agissant en tant qu'inhibiteurs de VIH intégrase et de la réplication du VIH. Ces composés sont utilisés dans le cadre de la prévention et du traitement des infections par le VIH et du sida, que ce soit sous forme de composés, de sels acceptables du point de vue pharmaceutique ou d'ingrédients de composition pharmaceutique, seuls ou associés à d'autres antiviraux, immunorégulateurs, antibiotiques ou vaccins. L'invention concerne également des méthodes de traitement du sida ainsi que des méthodes de prévention et de traitement des infections par VIH.
Transition-metal-free access to benzyl ethers <i>via</i> aerobic cross-dehydrogenative coupling of benzylic C(sp<sup>3</sup>)–H bonds with alcohols
作者:Xiao Zhang、Wenjie Li、Yang Yu、Min Luo、Hua Bai、Lei Shi、Hao Li
DOI:10.1039/d3gc04070d
日期:——
cross-dehydrogenative coupling of benzylic C(sp3)–H bonds with various alcohols utilizing molecular oxygen as the sole oxidant. This transition-metal-free and chemical-oxidant-free methodology could enable direct and selective alkoxylation of benzylic C(sp3)–H bonds, especially the primary benzylic C–H bond, which is prone to undergo overoxidation. Moreover, the aerobic oxidative C–H/O–H cross-coupling
我们开发了一种实用的 KO t Bu 或 KOH 催化的苄基 C(sp 3 )–H 键与各种醇的有氧交叉脱氢偶联,利用分子氧作为唯一氧化剂。这种无过渡金属和化学氧化剂的方法可以实现苄基C(sp 3 )–H键的直接和选择性烷氧基化,特别是容易发生过度氧化的初级苄基C–H键。此外,有氧氧化C-H/O-H交叉偶联方法为在温和反应条件下构建具有高化学选择性的苄基醚提供了一条实用且可持续的途径。
Zincke; Walter, Justus Liebigs Annalen der Chemie, 1904, vol. 334, p. 373