β-Keto-δ-valerolactones, which were obtained by reaction of acetoacetate with aldehydes or ketones, reacted with carbon disulfide, alkyl halides and a new con
4-Amino-5-(pyridin-3-yl)-4H-1,2,4-triazole-3-thiol 1 were condensed with 2-bromo-1-(substituted phenyl)ethanone to give pyridinyltriazolothiadiazines 2a~c, which
The β-aminocarboxylic acid derivatives were synthesized by Michael addition reaction ofalkyl amine and α,β-unsaturated carbonyl compounds in the presence of
The cis-l-substituted-6,7-dihydroxy-l,2,3,4-tetrahydroisoquinoline-3-carboxylic acid esters 3 can be obtained in a highly diastereoselective fashion through 1,3
Piperonyl methyl ketone was obtained by oxidizing isosafrole with hydrogen peroxide and formic acid. Dianion of ethyl acetoacetate reacted with piperonyl methyl