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Synthetic Communications
An International Journal for Rapid Communication of Synthetic Organic Chemistry
Volume 36, 2006 - Issue 24
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Original Articles

Synthesis of a Particular Class of Silicon‐Tethered Dinucleophiles: Several Propargyloxydimethylsilyl Enol Ethers

, &
Pages 3655-3665 | Received 17 Oct 2005, Published online: 01 Dec 2006
 

Abstract

The propargyloxydimethylsilyl enol ethers derived from propanone, 2‐butanone, 3,3‐dimethyl‐2‐butanone, 3‐pentanone, 4‐methyl‐2‐pentanone, 2‐heptanone, 4‐heptanone, 2,6‐dimethyl‐4‐heptanone, cyclopentanone, cyclohexanone, cycloheptanone, benzophenone, and propiophenone have been synthesized by two methods: The thermodynamic method is conducted by heating the propargyloxysilyl chloride, triethylamine, and the corresponding ketone in acetonitrile at 40–50°C for less than an hour in the presence of an equimolar amount of sodium iodide; the mixture is maintained at that temperature for an hour. The yields were in the range of 50–95%. In method two (kinetic controlled), lithium diisopropylamide (LDA) was used as a base to abstract the acidic hydrogen, and then the resulted enolate was quenched with silyl chloride, with lower yields than the previous method. NMR, IR, and elemental analysis were used to characterize the products. Some reactions of these compounds have been investigated.

Acknowledgment

The authors thank Yarmouk University for financial support.

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