Oxidative Debenzylation of N-Benzyl Amides and O-Benzyl Ethers Using Alkali Metal Bromide
摘要:
The oxidative debenzylation of N-benzyl amides and O-benzyl ethers was promoted with high efficiency by a bromo radical formed through the oxidation of bromide from alkali metal bromide under mild conditions. This reaction provided the corresponding amides from N-benzyl amides and carbonyl compounds from O-benzyl ethers in high yields.
faster than the commonly used methods which use NaH in THF or DMF for p-methoxybenzylation of hydroxy and amide groups. The described method was applicable for sterically hindered substrates at room temperature without adding any activating reagents such as tetrabutylammonium iodide.
的p被羟基和酰胺基团的-methoxybenzylation p甲氧基苄基氯利用的NaO吨-Bu在DMSO中描述。在DMSO中使用NaO t -Bu对位阻薄荷醇进行对甲氧基苄基化的过程比在THF或DMF中使用NaH对羟基和酰胺基进行对甲氧基苄基化的常用方法进行得更快。所描述的方法适用于室温下受阻的底物,而无需添加任何活化剂,例如四丁基碘化铵。
US7345051B2
申请人:——
公开号:US7345051B2
公开(公告)日:2008-03-18
[EN] TEAD INHIBITORS AND USES THEREOF<br/>[FR] INHIBITEURS DE TEAD ET LEURS UTILISATIONS
申请人:IKENA ONCOLOGY INC
公开号:WO2020243415A2
公开(公告)日:2020-12-03
The present invention provides compounds, compositions thereof, and methods of using the same.
Oxidative Debenzylation of <i>N</i>-Benzyl Amides and <i>O</i>-Benzyl Ethers Using Alkali Metal Bromide
作者:Katsuhiko Moriyama、Yu Nakamura、Hideo Togo
DOI:10.1021/ol501703y
日期:2014.7.18
The oxidative debenzylation of N-benzyl amides and O-benzyl ethers was promoted with high efficiency by a bromo radical formed through the oxidation of bromide from alkali metal bromide under mild conditions. This reaction provided the corresponding amides from N-benzyl amides and carbonyl compounds from O-benzyl ethers in high yields.
<i>p</i>-Methoxybenzyl-Radical-Promoted Chemoselective Protection of <i>sec</i>-Alkylamides
作者:JingWen Jia、Terumasa Kato、Keiji Maruoka
DOI:10.1021/acs.joc.2c02582
日期:2023.2.17
The hitherto difficult site-selective p-methoxybenzylation of secondary amides using p-methoxybenzylated alkylsilyl peroxides as a novel p-methoxybenzylation agent under coppercatalysis is reported. The reaction proceeds under mild reaction conditions in a highly chemoselective manner. This approach was successfully applied to the site-selective p-methoxybenzylation of peptides.