Diastereoselective synthesis of diverse 3,2′-pyrrolidinyl bispirooxindoles via 1,3-dipolar cycloaddition reactions of azomethine ylides with exocyclic α,β-unsaturated ketones and <i>in silico</i> studies for prediction of bioactivity
作者:Kartik Dutta、Mukesh Kumar、Sunil K. Ghosh、Amit Das、Raghunath Chowdhury
DOI:10.1080/00397911.2018.1560472
日期:2019.2.1
Abstract A three-component highly regio- and diastereoselective1,3-dipolarcycloaddition reaction between isatin, a series of primary amino acids (10 nos), and exocyclic α,β-unsaturated ketones was developed towards the synthesis of a small library of bispirooxindole (20 nos) at ambient temperature. The developed reaction afforded highly substituted 3,2′-pyrrolidine-bispirooxindole with two vicinal
spiroheterocycles are considered as emerging drug candidates, synthesis of spiroaziridines has not been well explored so far. Herein, we disclose an efficient I2/TBHP mediated diastereoselectivesynthesis of N-alkyl spiroaziridines from primary amines and easily accessible α,β-unsaturated ketones. The reaction is also compatible for the synthesis of 2-aroylaziridines.
[EN] NEW ELECTRON TRANSPORT MATERIAL AND ORGANIC ELECTROLUMINESCENT DEVICE USING THE SAME<br/>[FR] NOUVEAU MATÉRIAU DE TRANSPORT D'ÉLECTRONS ET DISPOSITIF ORGANIQUE ÉLECTROLUMINESCENT L'UTILISANT
申请人:ALPHA CHEM CO LTD
公开号:WO2013180376A1
公开(公告)日:2013-12-05
Provided are a new electron transport material and an organic electroluminescent device including the same. The electron transport material according to the present invention may have the excellent luminescence property and reduce the driving voltage to increase the power efficiency, such that the organic electroluminescent device using less consumption power may be manufactured.
Catalytic enantioselective cascade Michael/cyclization reaction of 3-isothiocyanato oxindoles with exocyclic α,β-unsaturated ketones en route to 3,2′-pyrrolidinyl bispirooxindoles
作者:Satavisha Kayal、Santanu Mukherjee
DOI:10.1039/c6ob02187e
日期:——
Cascade Michael/cyclization reactions between 3-isothiocyanato oxindoles and exocyclic α,β-unsaturated ketones are shown to proceed efficiently in the presence of a quinine-derived tertiary amino-squaramide catalyst and furnish 3,2′-pyrrolidinyl bispirooxindoles containing two spiro-quaternary and three contiguous stereocenters as a single diastereomer with excellent enantioselectivities (up to 99 : 1
BF<sub>3</sub>·Et<sub>2</sub>O mediated one-step synthesis of N-substituted-1,2-dihydropyridines, indenopyridines and 5,6-dihydroisoquinolines
作者:C. T. Fathimath Salfeena、K. T. Ashitha、B. S. Sasidhar
DOI:10.1039/c6ob02133f
日期:——
A simple and efficient one-pot synthesis of N-substituted-1,2-dihydropyridines, indenopyridines and 5,6-dihydroisoquinolines by a BF3·Et2O mediated novel methodology, from easily available α,β-unsaturated ketones/arylidene ketones, phenyl acetylenes and substituted nitriles, has been described. This novel annulation provides quick access to complex polycyclic frameworks with an excellent substrate