Transetherification of 2,4-dimethoxynitrobenzene by aromatic nucleophilic substitution
作者:Jiho Song、Hae Ju Kang、Jung Wuk Lee、Michelle A. Wenas、Seung Hwarn Jeong、Taeho Lee、Kyungsoo Oh、Kyung Hoon Min
DOI:10.1371/journal.pone.0183575
日期:——
In view of the few reports concerning aromatic nucleophilicsubstitution reactions featuring an alkoxy group as a leaving group, the aromatic nucleophilicsubstitution of 2,4-dimethoxynitrobenzene was investigated with a bulky t-butoxide nucleophile under microwave irradiation. The transetherification of 2,4-dimethoxynitrobenezene with sodium t-butoxide under specific conditions, namely for 20 min
PREPARATION METHOD FOR BENZOXAZOLEOXAZINE KETONE COMPOUND AND INTERMEDIATE AND CRYSTAL FORM THEREOF
申请人:North China Pharmaceutical New Drug R&D Co., Ltd.
公开号:EP3199536A1
公开(公告)日:2017-08-02
A preparation method for a high-purity benzoxazoleoxazine ketone compound, a crystal form thereof, and an intermediate compound for preparing a compound of formula (I), and a preparation method therefor.
Preparation method for benzoxazoleoxazine ketone compound and intermediate and crystal form thereof
申请人:NORTH CHINA PHARMACEUTICAL NEW DRUG R & D CO., LTD.
公开号:US10106557B2
公开(公告)日:2018-10-23
A preparation method for a high-purity benzoxazoleoxazine ketone compound, a crystal form thereof, and an intermediate compound for preparing a compound of formula (I), and a preparation method therefor.
Nonpolar Solvent a Key for Highly Regioselective S<sub>N</sub>Ar Reaction in the Case of 2,4-Difluoronitrobenzene
作者:Suresh Kumar Sythana、Surendra R. Naramreddy、Santosh Kavitake、Vinod Kumar CH.、Pundlik R. Bhagat
DOI:10.1021/op500120z
日期:2014.7.18
A practical and highly regioselective aromatic nucleophilic substitution reaction for the substrate 2,4-difluoronitrobenzene is demonstrated with various O/S/N-nucleophiles. Solvent screens substantiate the role of a nonpolar solvent in ortho-selective nucleophilic substitution through a six-membered polar transition state.