Arylation of potassium 2,4-pentanedionate via SRN1 on diazosulfides
摘要:
Potassium 2,4-pentanedionate reacts with diazosulfides (E)-1 and (Z)-2 in DMSO to give 3-aryl-2,4-pentanediones 3 via an S(RN)1 process. Advantages and drawbacks of such new access to 3 are reported together with relevant mechanistic implications.
Synthesis and Structure–Activity Relationships of 4-Pyridones as Potential Antimalarials
作者:Clive L. Yeates、John F. Batchelor、Edward C. Capon、Neil J. Cheesman、Mitch Fry、Alan T. Hudson、Mary Pudney、Helen Trimming、James Woolven、José M. Bueno、Jesús Chicharro、Esther Fernández、José M. Fiandor、Domingo Gargallo-Viola、Federico Gómez de las Heras、Esperanza Herreros、María L. León
DOI:10.1021/jm0705760
日期:2008.5.1
A series of diaryl ether substituted 4-pyridones have been identified as having potent antimalarial activity superior to that of chloroquine against Plasmodium falciparum in vitro and murine Plasmodium yoelii in vivo. These were derived from the anticoccidial drug clopidol through a systematic study of the effects of varying the side chain on activity. Relative to clopidol the most active compounds
Nucleophilic Reactivities of Carbanions in Water: The Unique Behavior of the Malodinitrile Anion
作者:Thorsten Bug、Herbert Mayr
DOI:10.1021/ja036838e
日期:2003.10.1
calculated and compared with the nucleophilic reactivities of a large variety of n-, pi-, and sigma-nucleophiles, including reactivities of carbanions in dimethyl sulfoxide. While the acyl and ester substituted carbanions are approximately 3 orders of magnitude less reactive in water than in dimethyl sulfoxide, the malodinitrile anion (1i) shows almost the same reactivity in both solvents. Correlations between
Electrophilicity Parameters for Benzylidenemalononitriles
作者:Tadeusz Lemek、Herbert Mayr
DOI:10.1021/jo0344182
日期:2003.9.1
Kinetics of the reactions of stabilized carbanions (derived from nitroethane, diethyl malonate, ethylcyanoacetate, ethyl acetoacetate, acetyl acetone) with benzylidenemalononitriles have been determined in dimethyl sulfoxide solution at 20 degrees C. The second-order rate constants are employed to determine the electrophilicity parameters E of the benzylidenemalononitriles according to the correlation
Hetarylation of C-nucleophiles: a new course for the reaction of N-fluoropyridiniun salts with carbanions.
作者:Andrei A Gakh、Alexander S Kiselyov、Victor V Semenov
DOI:10.1016/s0040-4039(00)88572-x
日期:1990.1
The N-fluoropyridinium tetrafluoroborate reactions with carbanions were found either to follow the cine -(tele)-AEa-substitution or go through possible formation of a carbenic (cationic) intermediate; as a result 2- or 4-pyridyl derivatives are formed.
Reaction of aryl halides with sodium or potassium acetylacetonate in the presence of a copper catalyst affords directly arylacetones resulted from deacetylation of initially formed 3-arylacetylacetones in good yields.