Versatile three-component synthesis of 2′-amino-1,2-dihydrospiro[(3H)-indole-3,4′-(4′H)-pyran]-2-ones
作者:V. Yu. Mortikov、Yu. M. Litvinov、A. A. Shestopalov、L. A. Rodinovskaya、A. M. Shestopalov
DOI:10.1007/s11172-008-0338-7
日期:2008.11
2-dihydrospiro[(3H)-indole-3,4′-(4′H)-pyran]-2-ones has been suggested consisting in the three-component reaction of isatins, cyanoaceticacid derivatives, and α-methylenecarbonyl compounds (β-dicarbonyl compounds, activated phenols, and OH-substituted heterocycles) in ethanol in the presence of triethylamine as a catalyst. The reaction proceeds selectively to form spiro[(3H)-indole-3,4′-(4′H)-pyrans].