A Convenient Synthesis of 1-Alkoxy-2-alkyl-1,2-dihydroisoquinoline-3,4-diones Utilizing the Reaction of 2-(Dialkoxymethyl)phenyllithiums with Dimethyl Oxalate
作者:Kazuhiro Kobayashi、Yuuya Honda、Minami Kuroda
DOI:10.1002/hlca.201500254
日期:2016.2
for the preparation of 1,2‐dihydroisoquinoline‐3,4‐diones with alkoxy and alkyl groups at the 4‐ and 3‐positions, respectively, using an easily operated three‐step sequence starting from2‐(dialkoxymethyl)phenyl bromides has been developed. Thus, the starting materials are treated with BuLi to generate 2‐(dialkoxymethyl)phenyllithiums, which are allowed to react with (COOMe)2 to give methyl 2‐(dialk
Synthesis of 1,3-Dihydro-3-oxo-2-benzofuran-1-carboxylates<i>via</i>Intramolecular Cyclization of 2-[2-(Dimethoxymethyl)phenyl]- 2-hydroxyalkanoates Followed by Oxidation
3‐dihydro‐3‐oxo‐2‐benzofuran‐1‐carboxylates 4 under mild conditions has been developed. Thus, the reaction of [2‐(dimethoxymethyl)phenyl]lithiums, generated easily from 1‐bromo‐2‐(dimethoxymethyl)benzenes 1, with α‐keto esters gives the corresponding 2‐[2‐(dimethoxymethyl)phenyl]‐2‐hydroxyalkanoates 2. The TsOH‐catalyzed cyclization of these hydroxy acetals is followed by the oxidation of the resulting cyclic
Getting some closure: Mechanistic studies supported the participation of an oxanickelacycle complex in the hydroacylation step of the title reaction, which proceeds without decarbonylation even in the absence of well‐known chelation assistance by heteroatoms.
Hydrolytically-Resistant Boron-Containing Therapeutics And Methods Of Use
申请人:Lee Ving
公开号:US20070265226A1
公开(公告)日:2007-11-15
Compositions and methods of use of boron derivatives, including benzoxaboroles, benzazaboroles and benzthiaboroles, as therapeutic agents for treatment of diseases caused by fungi, yeast, bacteria or viruses are disclosed, as well as methods for synthesis of said agents and compositions thereof.