55676-25-0Relevant academic research and scientific papers
Palladium-catalyzed regiocontrolled internal heteroarylation of electron-rich olefins with heteroaryl halides
Xu, Dan,Liu, Zhihua,Tang, Weijun,Xu, Lijin,Hyder, Zeynab,Xiao, Jianliang
scheme or table, p. 6104 - 6107 (2009/04/04)
A highly efficient palladium-catalyzed Heck coupling reaction of heteroaryl halides with electron-rich vinyl ether and hydroxyalkyl vinyl ethers is described. It was found that the choice of solvent, ligand, and reaction temperature had a fundamental influence on the regioselectivity and reactivity of the reaction, and the combination of Pd(OAc)2 and DPPF in ethylene glycol led to the most effective catalytic system. Under these conditions, a variety of heteroaryl halides reacted very quickly with electron-rich olefins to afford exclusively the branched products in good to excellent yields without employing triflates, halide scavengers, or ionic liquids.
1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid compounds
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, (2008/06/13)
1-Azabicyclo[3.2.0]hept-2-ene-2-carboxyic acids having antimicrobial activity have been prepared.
Syntheses of an Antipsychotic Pyrroloisoquinoline from Areca Alkaloids
Coffen, David L.,Hengartner, Urs,Katonak, David A.,Mulligan, Mary E.,Burdick, David C.,et al.
, p. 5109 - 5113 (2007/10/02)
2,6-Dimethyl-3-ethyl-4,4a,5,6,7,8,8a,9-octahydro-4a,8a-trans-1H-pyrroloisoquinolin-4-one, a conformationally defined antipsychotic agent of current clinical interest, can be synthesized in a two-step, single-pot process from arecoline, a commercially available member of the areca alkaloid group.The yield is diminished by the competing, base-induced rearrangement of arecoline to 1,3-dimethyl-2-pyridone.This problem can be circumvented by using arecolone as the starting material.A convenient synthesis of arecolone from 3-acetylpyridine is described.A modifiedform of the Neber rearrangement was used to prepare 2-amino-3-pentanone hydrochloride for use in the Knorr pyrrole synthesis step of the process.Two isomeric pyrroloisoquinolines produced as minor byproducts were isolated and characterized as the cis- and trans- isomers.Characterization of the latter included an X-ray crystal structure determination.
CARBOLINES. 14. SYNTHESIS OF 5-AZAELLIPTICINE
Kononova, V. V.,Semenov, A. A.
, p. 929 - 932 (2007/10/02)
3-Acetyl-4-methylaminopyridine was obtained by cyanation of 3-acetylpyridine ethyleneketal N-oxide and subsequent chemical transformations of the nitrile group.Condensation of this product with oxindole led to the synthesis of 5H-5,11-dimethylindolo-1,4-naphthyridine - the aza analog of the alkaloid ellipticine.
