1,3-Dipolar Cycloaddition of Ethyl Diazoacetate to Alkynes in the Pores of Zeolite NaY
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Zeolite NaY promotes 1,3-dipolar cycloaddition of ethyl diazoacetate to alkynes having an electron-withdrawing group to afford the corresponding functionalized pyrazoles in high yields. The activation of the dipolarophile inside the pores of NaY is proposed based on the <SUP>13</SUP>C MAS NMR analysis.
- Chemistry Letters
Chemistry Letters 36(1), 60-61, 2007-01-05
The Chemical Society of Japan