scholarly journals Kinetic Solvent Effects on K+/K(Hg)Electrodes in Some Dipolar Aprotic Solvent Systems by Cyclic Voltammetry

1990 ◽  
Vol 63 (5) ◽  
pp. 1489-1495
Author(s):  
Swapan K. Bhattacharya ◽  
Kiron K. Kundu
Keyword(s):  
Cyclic Voltammetry ◽  
Solvent Effects ◽  
Aprotic Solvent ◽  
Dipolar Aprotic Solvent ◽  
Solvent Systems

Heterocyclic ambident nucleophiles. IV. The alkylation of metal salts of adenine

1982 ◽  
Vol 35 (3) ◽  
pp. 535 ◽  
Author(s):  
M Rasmussen ◽  
JM Hope
Keyword(s):  
Solvent Effects ◽  
Aprotic Solvent ◽  
Alkylating Agents ◽  
Metal Salts ◽  
Main Reaction ◽  
Potassium Salts ◽  
Dipolar Aprotic Solvent ◽  
Protic Solvents ◽  
The Common ◽  
Sodium And Potassium

The N3 : N7 : N9 alkylation patterns for reactions of the lithium, sodium, and potassium salts of adenine with various alkylating agents in dimethyl sulfoxide were determined by 1H n.m.r. spectroscopy. Only for the Li+ salt was any significant effect of ionic association noticed. Of the alkylating agents used, only chloromethyl pivalate gave a concentration dependent alkylation pattern. The latter effect was most pronounced with the heterogeneous alkylation conditions of anhydrous Na2CO3/HCONMe2, adenine, and chloromethyl pivalate; here, increasing concentrations changed the main reaction from N7- to N9-alkylation. Solvent effects on the alkylation patterns were also studied. Within the common dipolar aprotic solvent group, (Me2N)3PO, HCONMe2 and Me2SO, effects were small; in protic solvents, particularly formamide, enhanced N3-alkylation was observed.

scholarly journals Butadiene sulfone as ‘volatile’, recyclable dipolar, aprotic solvent for conducting substitution and cycloaddition reactions

2015 ◽  
Vol 3 (1) ◽  
Author(s):  
Yong Huang ◽  
Esteban E. Ureña-Benavides ◽  
Afrah J. Boigny ◽  
Zachary S. Campbell ◽  
Fiaz S. Mohammed ◽  
...  
Keyword(s):  
Aprotic Solvent ◽  
Cycloaddition Reactions ◽  
Dipolar Aprotic Solvent
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