Metal‐Free Synthesis of Anthranils by PhIO Mediated Heterocyclization of
<i>ortho</i>
‐Carbonyl Anilines
作者:Alankrita Garia、Jatin Grover、Nidhi Jain
DOI:10.1002/ejoc.202100756
日期:2021.8.6
A metal-free synthesis of anthranils from ortho-carbonyl anilines using PhIO as a sole reagent under ambient conditions is described. No external additives are required, the reaction has broad substrate scope and delivers anthranils in excellent yields via oxidative heterocyclization.
neutrophilic inflammatory disease. Sivelestat is the only commercially available selective HNE inhibitor. Therefore, sivelestat was chosen as the model structure in an attempt to obtain more potent anti-NsPs agents. In the present study, a series 2-aminobenzaldehyde oxime and 2-aminobenzoate analogs were synthesized and their inhibitory effects on NsPs (CatG, Pr3, and HNE) were determined, respectively. The
Design and synthesis of tricyclic terpenoid derivatives as novel PTP1B inhibitors with improved pharmacological property and <i>in vivo</i> antihyperglycaemic efficacy
In our previous work, a synthetic oleanolic acid (OA) derivative C10a with PTP1B inhibitory activity has been reported. However, C10a has some pharmacological defects and cytotoxicity. Herein, a structure-based drug design approach was used based on the structure of C10a to elaborate the smaller tricyclic core. A series of tricyclicderivatives were synthesised and the compounds 15, 28 and 34 exhibited
Polyimide foams having enhanced compression fatigue life and softness for use in the manufacture of seat cushions and methods for the production of such foams and precursors therefor. These foams are produced from polyimides prepared by reaction of an organic tetracarboxylic acid or derivative thereof, preferably an ester with (a) 1 to 50 mol percent of a diester of (i) a primary amino-substituted aromatic carboxylic acid, and (ii) a polymethylene glycol, and (b) at least one aromatic or heterocyclic primary diamine. Foams can be produced having (a) a fatigue life as determined by ASTM test procedure D 3574-81 using foam specimens from three to five inches in thickness (7.6 to 12.7 cm) of at least 15,000 cycles, or (b) an indentation force deflection as determined by ASTM test procedure D3574-81 on foam specimens of one-inch thickness of less than 40 pounds of force (178N) at 25% deflection and less than 180 pounds of force (801N) at 65% deflection, or both of (a) and (b).
Flexible polyimide foams having enhanced compression charateristics and softness for use in the manufacture of seat cushions may be produced from novel polyimides prepared by reaction of at least one aromatic and/or heterocyclic primary diamine with a mixture of at least two organic tetracarboxylic acids or derivatives thereof, at least one of which is from 1 to 40 mol percent of a 2-(vicinal-di-carboxycyclohexenyl)succinic acid or derivative thereof and a second of which is an aromatic tetracarboxylic acid or derivative thereof.