- Synthesis of 1,2,3,5-tetrasubstituted pyrrole derivatives from 2-(2-bromoallyl)-1,3-dicarbonyl compounds
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2-(2-Bromoallyl)-1,3-dicarbonyl compounds are converted into β-enamino, β-hydrazino esters and ketones, followed by base-promoted cyclization, leading to the formation of the corresponding 1,2,3,5-tetrasubstituted pyrroles. 1,2,4- and 1,2,3,4-Substituted pyrroles are also isolated as minor products. Starting from the 2-(2-bromoallyl)-cyclohexane-1,3-dione the corresponding tetrahydro indolone is prepared in good yield.
- Demir, Ayhan S,Akhmedov, Idris M,Sesenoglu, ?zge
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p. 9793 - 9799
(2007/10/03)
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- Reaction of lithium trimethylsilyldiazo-methane with n,n-dialkylamides of α-keto acids and n,n-disubstituted α-amino ketones
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Lithium trimethylsilyldiazomethane smoothly reacted with N ,N -dialkylamides of α-keto acids and N ,N-disubstituted α-amino ketones to give 2-oxo-3-pyrrolines and 3-pyrrolines, respectively, in good to moderate yields.
- Ogawa, Hideki,Aoyama, Toyohiko,Shioiri, Takayuki
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