| 摘要 |
Catechol derivs. of formula (I) are new: where X is -CH2CH2-or -CH=CH-; Y is -CH=CH-, -CH2-CO-, -CH2-CHOH- or -CH2CH2-; n is 2 to 8. Formation of an enolate by reaction of (II) with an alkali di(cyclo)alkylamide, alkali alkoxide, alkali hexamethylsilazide or alkyl-alkali metal; then reaction of the enolate with a (3-9C) n-alkanoic acid imidazolamide gives (I, X = -CH=CH-; Y = -CH2-CO-). This can be reduced to (I, X = -CH2CH2; Y = -CH2CO-). Reaction of the enolate of (II) with a 3-9C n-alkanal gives (I, X = -CH=CH-; Y = -CH2CHOH-), which can be reduced to (I, X = -CH2CH2-; Y = -CH2CHOH-); this on dehydration gives (I, X = -CH2CH2-; Y = -CH=CH-). This on reduction forms (I, X = Y = -CH2CH2-). |
