Pyrylium salts in the synthesis of 2-pyrazoline derivatives and earlier unknown substituted 3,3a,4,7-tetrahydropyrazolo[1,5-a]pyridin-7-ones
作者:L. Yu. Ukhin
DOI:10.1007/s11172-007-0324-5
日期:2007.10
New 1,3,5-substituted 2-pyrazoline derivatives were synthesized from 2,6-diphenylpyrylium perchlorate and acylhydrazines. Method for the synthesis of earlier unknown 3,3a,4,7-tetrahydropyrazolo[1,5-a]pyridin-7-one derivatives from pyrylium salts and cyanoacetic acid hydrazide was proposed.
One-Pot Synthesis of 2,6-Di-<i>t</i>-butyl- and 2,6-Diarylthiopyrylium Perchlorates
作者:Giancarlo Doddi、Gianfranco Ercolani
DOI:10.1055/s-1985-31351
日期:——
The title compounds were prepared by reaction of the corresponding methyl ketone with an excess of triethyl orthoformate in an acidic medium (acetic anhydride/perchloric acid) under a hydrogen sulfide stream.
Trimeric palladium acetate reacts with 2,6-disubstituted pyryliumsalts to give trinuclear bis-acyl-allylpalladium acetates. The structure of bis(1,3-dipyvaloyl-π-allyl)trispalladium(II) μ-tetraacetate is determined by an X-ray study.