Author:
Curran Dennis P.,Kuo Lung Huang
Subject
Organic Chemistry,Drug Discovery,Biochemistry
Reference19 articles.
1. Altering the Stereochemistry of Allylation Reactions of Cyclic .alpha.-Sulfinyl Radicals with Diarylureas
2. Altering the Stereochemistry of Allylation Reactions of Cyclic .alpha.-Sulfinyl Radicals: Effects of Solvents and Lewis Acids
3. Procedure for conducting the Claisen Rearrangement of enol ether 5a in the presence of additive: A 0.2 M stock solution of enol ether 5a in C6D6 was prepared and routinely stored in the refrigerator. In each run, 0.60 mL of enol ether 5a in C6D6 solution was transfered by syringe to a 5 mL flask containing weighed amount of additive. The mixture was stirred to homogeneity and then transfered to an NMR sample tube and sealed. A 1H-NMR spectrum was recorded every 6 h for catalyzed reactions (or 12 h for uncatalyzed reactions) until about 70% of enol ether 5a was consumed. Plots of In A/A0 versus time were linear with high correlation coefficients (> 0.9990). The rate constant was calculated using a first order rate law with the assumption that the aldehyde was generated exclusively.
4. Synthesis and Claisen rearrangement of alkoxyallyl enol ethers. Evidence for a dipolar transition state
5. Effect of polar solvents on the rates of Claisen rearrangements: assessment of ionic character
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