Lactone Compounds Research Articles

Reactions of Lactonic Compounds with Nitrogen-containing Reagents. I. Reaction of Byakangelicol with Dimethylamine and Piperidine

Byakangelicol (I) was treated with dimethylamine or piperidine in benzene below 60°(condition A), in methanol near room temperature (condition B), and in benzene in a sealed tube at 125°(condition C). Amine amides (VIII and IX), neutral amides (X and XII), and neutral amides (XI and XIII) were obtained under conditions A, B, and C, respectively. Results of ultraviolet and nuclear magnetic resonance measurements and chemical treatment showed that X-XI and XII-XIII were in geometrical relationship, X and XII being cis isomers and XI and XIII trans isomers. An equilibrium between XII and XIII in a 87 : 13 ratio was established within 25 hr when either XII or XIII in 0.1N NaOH-EtOH was exposed to diffused light.

Lactonic compounds of apricot

Lactonic compounds of apricot

Syntheses of 2-substituted-4,6-diamino-8-triazines.

The reaction of 1-substituted biguanide with phenylenedicarboxylic acid ethyl ester afforded 2-amino-4-(substituted amino)-6-carboxyphenyl-s-triazine (II) along with 2, 2'-phenylenebis [4-amino-6-(substituted amino)-s-triazine] (XIII and XVI). Product II was derived to its guanidinium salt. The related reactions concerned to the above synthetic methods, were also described. Moreover, 2-amino-4-(substituted amino)-6-hydroxyalkyl-s-triazine (IV) was synthesized from the condensation of 1-substituted biguanide with lactone compound.

On the Occurrence of a New Lactone Compound, trans-4-Methyl-5-hydroxyhexanoic Acid Lactone, in Milk.

On the Occurrence of a New Lactone Compound, trans-4-Methyl-5-hydroxyhexanoic Acid Lactone, in Milk.

Oospolide: A ten-membered ring lactone compound isolated from [formula omitted

Oospolide: A ten-membered ring lactone compound isolated from [formula omitted