Direct amination of 2-(1-tosylalkyl)phenols with aqueous ammonia: a metal-free synthesis of primary amines
摘要:
A metal-free and concise method for the selective synthesis of primary amines directly from 2-(1-tosylalkyl)phenols with aqueous ammonia under mild conditions has been developed. In addition, primary amine could be conveniently converted to benzoxazinone in good yield. (C) 2015 Elsevier Ltd. All rights reserved.
Straightforward Synthesis of Bifunctional Phosphorus Phenols via Phosphination of In Situ Generated o-Quinone Methides
作者:Zhangpei Chen、Qinglong Shi、Gongshu Wang、Siwen Chen、Jianshe Hu
DOI:10.3390/molecules23061240
日期:——
An efficient and practical approach towards bifunctional phosphorus phenols has been developed through a reaction of diphenylphosphine oxide and the o-quinone methides in situ generatedfrom 2-tosylalkyl phenols under basic conditions. This protocol features simple experimental procedures under mild conditions and is easily scaled up. With this method, a variety of diarylmethyl phosphine oxides can
A Concise Synthesis of 2-(2-Hydroxyphenyl)acetonitriles<i>via</i>the<i>o</i>-Quinone Methides Generated from 2-(1-Tosylalkyl)phenols
作者:Bo Wu、Xiang Gao、Mu-Wang Chen、Yong-Gui Zhou
DOI:10.1002/cjoc.201400463
日期:2014.10
A concise synthesis of 2‐(2‐hydroxyphenyl)acetonitriles has been developed through reaction of trimethylsilyl cyanide and the o‐quinone methides in situ generatedfrom 2‐(1‐tosylalkyl)phenols under basic conditions. In addition, 2‐(2‐hydroxyphenyl)acetonitriles could be conveniently transformed to benzofuranones.
Synthesis of Chiral Pyrazolone and Spiropyrazolone Derivatives through Squaramide-Catalyzed Reaction of Pyrazolin-5-ones with <i>o</i>-Quinone Methides
作者:Ji Zhou、Wen-Jun Huang、Guo-Fang Jiang
DOI:10.1021/acs.orglett.8b00025
日期:2018.2.16
A bifunctional squaramide-catalyzed reaction of pyrazolin-5-ones with o-quinonemethides in situ generated from 2-(1-tosylalkyl)phenols has been successfully developed, providing a facile access to chiral pyrazolones with high enantioselectivities. In addition, the chiral spiropyrazolones with adjacent tertiary and quaternary stereogenic centers can also be obtained through cascade chlorination/cyclization