Palladium(II) on 4 Å Molecular Sieves: A Simple and Reusable Catalyst for the Preparation of Ynones

Abstract

Pd2+ on 4 Å molecular sieves support has been prepared and investigated. The catalyst has successfully been used in the reaction of acyl chlorides and terminal alkynes yielding ynones. The catalyst can be reused without significant loss of activity. Graphic Abstract

Applying Heterogeneous Catalytic Reactions for Organic Chemical Syntheses

“…In these cases, when benzoyl chloride (38) was used as acyl component, significant amount of 3-benzoylbenzoic acid was formed as by-product, indicating a Friedel-Crafts acylation-type concurrent reaction. The catalyst could be easily separated from the reaction mixture and reused without significant decrease in the activity at least in 4 cycles [48].…”

Oxime Palladacycle Supported on Magnetic Meoporous Silica: An Efficient Catalyst for Copper‐Free Acyl Sonogashira Reaction

“…The catalyst displayed good efficiency toward various electron‐donating and electron‐withdrawing groups on the acyl chloride. Juhász and Hell [16e] applied the Pd(II)‐supported on 4 Å molecular sieves to synthesize of α,β‐conjugated acetylenic ketones via the acyl Sonogashira reaction. They reported the formation of a large amount of by‐products in some cases.…”