Aerobic oxidative deprotection of benzyl-type ethers under atmospheric pressure catalyzed by 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ)/tert-butyl nitrite
作者:Zhenlu Shen、Lili Sheng、Xiaochu Zhang、Weimin Mo、Baoxiang Hu、Nan Sun、Xinquan Hu
DOI:10.1016/j.tetlet.2013.01.045
日期:2013.3
efficient protocol for the oxidativedeprotection of benzyl-type ethers has been developed. The reaction was performed with catalytic amounts of 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) and tert-butyl nitrite (TBN) under atmospheric pressure of O2. Under the optimal reaction conditions, a variety of p-methoxybenzyl (PMB), p-phenylbenzyl (PPB), and benzyl (Bn) ethers can be deprotected to their
2,3-Dichloro-5,6-dicyano-1,4-benzoquinone-catalyzed aerobic oxidation reactions via multistep electron transfers with iron(<scp>ii</scp>) phthalocyanine as an electron-transfer mediator
作者:Yiming Hong、Tiantian Fang、Meichao Li、Zhenlu Shen、Xinquan Hu、Weimin Mo、Baoxiang Hu、Nan Sun、Liqun Jin
DOI:10.1039/c6ra08921f
日期:——
A new biomimetic catalytic oxidation system which employs 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) as the catalyst, molecular oxygen as the terminal oxidant and iron(II) phthalocyanine (FeIIPc) as the electron-transfer mediator has been developed. This system can be applied for oxidativedeprotection of PMB ethers, alcohol oxidation, aromatization and α,β-unsaturated aldehyde formation. After
一种新型的仿生催化氧化系统,采用2,3-二氯-5,6-二氰基-1,4-苯醌(DDQ)作为催化剂,分子氧作为末端氧化剂,铁(II)酞菁(Fe II Pc)电子转移介体已经开发出来。该系统可用于PMB醚的氧化脱保护,醇氧化,芳构化和α,β-不饱和醛的形成。将Fe II Pc固定在多壁碳纳米管上后,可以重复使用而不会损失活性。
2,3-Dichloro-5,6-dicyano-1,4-benzoquinone (DDQ)/tert-Butyl Nitrite/Oxygen: A Versatile Catalytic Oxidation System
作者:Zhenlu Shen、Jialiang Dai、Jie Xiong、Xijun He、Weimin Mo、Baoxiang Hu、Nan Sun、Xinquan Hu
DOI:10.1002/adsc.201100429
日期:2011.11
A new catalytic oxidation system using catalytic amounts of 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) and tert-butyl nitrite with molecular oxygen serving as the environmentally benign, terminal oxidant has been developed. This aerobic catalytic system was established for the selectiveoxidation of non-sterically hindered benzylic alcohols and electron-rich benzyl methyl ethers, and successfully