Microwave Assisted Rapid Preparation of N-Alkyl-2-pyridones under Neutral Conditions by Hilbert-Johnson Reaction
摘要:
The reactions of 2-methoxypyridine with haloalkanes without solvent and catalyst under microwave irradiation (100-200 degrees C, 5 min) yielded the corresponding N-alkyl-2(1H)-pyridones in good to moderate yields. However, the reactions were sensitive to length of haloalkanes. In contrast, the reactions of 2-alkoxypyridines with corresponding iodoalkanes under microwave irradiation (150 degrees C) proceeded rapidly without catalyst and solvent, and were complete within 5 min to afford N-alkyl-2(1H)-pyridones in good to excellent yields.
A directing group free Pd(<scp>ii</scp>)-catalysed desulfitative C6-arylation of 2-pyridone using an arylsulfonyl chloride
作者:Ujjwal Karmakar、Rajarshi Samanta
DOI:10.1039/d0ob01716g
日期:——
A Pd(II)-catalysed directdesulfitativearylation was realized at the C6-position of the 2-pyridone scaffold. Aryl sulfonyl chloride was used as an alternative arylating agent. The required site-selectivity occurred without the strategic installation of a heteroatom containing directing group. Preliminary mechanistic studies revealed that radical species were involved during this process.
在 2-吡啶酮支架的 C6 位实现了Pd( II ) 催化的直接脱硫芳基化。芳基磺酰氯用作替代的芳基化剂。在没有战略性地安装含杂原子的导向基团的情况下,就可以实现所需的位点选择性。初步机制研究表明,在此过程中涉及自由基物种。
Environmentally benign nucleophilic substitution reaction of arylalkyl halides in water using CTAB as the inverse phase transfer catalyst
作者:Atul K. Godha、Jayaraman Thiruvengadam、Viswanadhan Abhilash、Prajwal Balgi、A. V. Narayanareddy、Kumaresan Vignesh、Amol V. Gadakh、A. M. Sathiyanarayanan、Sambasivam Ganesh
DOI:10.1039/c9nj03941d
日期:——
An environmentally benign, practically scalable and highly selective C-arylalkylation of active methylene compounds is developed using CTAB as the inverse phase transfer catalyst in water. The methodology developed is elaborated into the one-pot synthesis of quinoline derivatives and also applicable to the regioselective N-aralkyl of 2-pyridones.
ARYL DIHYDROPYRIDINONE AND PIPERIDINONE MGAT2 INHIBITORS
申请人:Bristol-Myers Squibb Company
公开号:US20130143843A1
公开(公告)日:2013-06-06
The present invention provides compounds of Formula (I):
or a stereoisomer, or a pharmaceutically acceptable salt thereof, wherein all of the variables are as defined herein. These compounds are monoacylglycerol acyltransferase type 2 (MGAT2) inhibitors which may be used as medicaments.
A Manganese-promoted direct oxidative C−P bond formation between 2-pyridones and secondary phosphine oxides has been developed. The reported protocol proceeds under mild reaction conditions, and the C3-phosphinoylation is proposed to take place under a radical process in the presence of substoichiometric amount of Mn(II).