A new method was developed for the synthesis of alpha-alkyl- and alpha,alpha-dialkyl-beta-phenyl-tryptamines based on alkylation of nitroalkanes with alpha-phenyl-nor-gramine.
A new method was developed for the synthesis of alpha-alkyl- and alpha,alpha-dialkyl-beta-phenyl-tryptamines based on alkylation of nitroalkanes with alpha-phenyl-nor-gramine.
Efficient Preparation of 2-Indolyl-1-nitroalkane Derivatives Employing Nitroalkenes as Versatile Michael Acceptors: New Practical Linear Approach to Alkyl 9<i>H</i>-β-Carboline-4-carboxylate
The combination of cerium(III) chloride heptahydrate and sodium iodide supported on silica gel is known to promote Michael-type additions. Continuing our work on solvent-free conditions, the CeCl3·7H2O−NaI−SiO2 system catalyzes the addition of a variety of indoles and nitroalkenes, giving 2-indolyl-1-nitroalkane derivatives in good yields. Development of this method has resulted in a new protocol for
The catalytic Friedel-Crafts alkylation of indoles with nitroalkenes to furnish 2-indolyl-1-nitroalkane derivatives at room temperature with moderate to excellent yields is reported using nanocrystalline titanium(IV) oxide (nano-TiO2) catalyst. In all cases, a single regioisomer was obtained. After completion of the reaction, the catalyst was recovered by centrifugation and activated under a nitrogen flow for 1h at 250 degrees C for further reuse. The nano-TiO2 can be reused for four cycles with a slight decrease of activity under the same reaction conditions.
The Reaction of Nitroölefins with Indole
作者:Wayland E. Noland、Glenn M. Christensen、Gerald L. Sauer、G. G. S. Dutton
DOI:10.1021/ja01607a070
日期:1955.1
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作者:B. B. Semenov、Yu. I. Smushkevich
DOI:10.1023/a:1015050806098
日期:——
A new method was developed for the synthesis of alpha-alkyl- and alpha,alpha-dialkyl-beta-phenyl-tryptamines based on alkylation of nitroalkanes with alpha-phenyl-nor-gramine.