Bf. Kukharev et al., SYNTHESIS OF 5-HYDROXY-N-(2-VINYLOXYALKYL)INDOLES FROM DICARBONYL-COMPOUNDS AND VINYLOXYALKYLAMINES, Russian chemical bulletin, 46(12), 1997, pp. 2113-2116
N-(Vinyloxyalkyl)enaminoketones were obtained by the condensation of v
inyloxyalkyl-amines with acetylacetone or ethyl acetoacetate. Their su
bsequent reactions with 1,4-benzoquinone produce the corresponding 5-h
ydroxy-2-methyl-N-(2-vinyloxyalkyl)indoles in 17-43% yields. The struc
tures of the compounds obtained were confirmed by IR and H-1 NMR spect
roscopy.