Conjugated azoalkenes. Part VI. α-Olefinated carbonyl derivatives by treatment of azoalkenes with carbomethoxymethylene triphenylphosphorane
作者:Orazio A. Attanasi、Paolino Filippone、Stefania Santeusanio
DOI:10.1016/s0040-4039(00)82192-9
日期:1988.1
α-Olefinated carbonyl derivatives have been obtained in good yield under very mild conditions by Wittig-type reaction of some conjugated azoalkenes with carbomethoxymethylene triphenylphosphorane. The reaction mechanism seems to implicate zwitterionic rather than cycloadduct intermediate, as usual for the Wittig reaction.
Regioselective [1N+2C+2C] Assembly of Fully Decorated Pyrroles from Primary Amines, 1,2-Diaza-1,3-dienes, and 2,3-Allenoates
作者:Francesca R. Perrulli、Gianfranco Favi、Lucia De Crescentini、Orazio A. Attanasi、Stefania Santeusanio、Fabio Mantellini
DOI:10.1002/ejoc.201501017
日期:2015.11
A mild, sequential multicomponent reaction strategy for the regioselective synthesis of functionalized pentasubstituted pyrrolesfrom readily accessible primaryamines, 1,2-diaza-1,3-dienes, and 2,3-allenoates, has been developed. The process allows a [1N+2C+2C] annulation to be achieved through two sequential hydroamination reactions followed by an enamine-carbocyclization. Moreover, allenoates, as
An Efficient One-Pot, Three-Component Synthesis of 5-Hydrazinoalkylidene Rhodanines from 1,2-Diaza-1,3-dienes
作者:Orazio A. Attanasi、Lucia De Crescentini、Gianfranco Favi、Paolino Filippone、Gianluca Giorgi、Fabio Mantellini、Giada Moscatelli、Mohamed S. Behalo
DOI:10.1021/ol900545v
日期:2009.6.4
A novel three-component synthesis of 5-hydrazinoalkylidene rhodanine derivatives starting from aliphatic primary amines, carbon disulfide, and 1,2-diaza-1,3-dienes is described. The reaction proceeds successfully under both solution and solid-phase conditions.
Access to novel imidazo[1,5-a]pyrazine scaffolds by the combined use of a three-component reaction and a base-assisted intramolecular cyclization
作者:Orazio A. Attanasi、Gianfranco Favi、Gianluca Giorgi、Roberta Majer、Francesca Romana Perrulli、Stefania Santeusanio
DOI:10.1039/c4ob00676c
日期:——
A novel and practical two-step approach to an intriguing class of imidazo[1,5-a]pyrazines with exocyclic CX (X = CH2, O) bonds is described. The process utilizes a sequentialthree-componentreaction of propargyl amine or aminoester, 1,2-diaza-1,3-dienes and isothiocyanates to furnish functionalized 2-thiohydantoins which are transformed into thiohydantoin-fused tetrahydropyrazines by subsequent regioselective
描述了一种新颖实用的两步方法,用于合成具有环外C X(X = CH 2,O)键的咪唑并[1,5- a ]吡嗪类。该方法利用炔丙胺或氨基酯,1,2-二氮杂-1,3-二烯和异硫氰酸酯的三组分顺序反应来提供官能化的2-硫代乙内酰脲,其通过随后的区域选择性碱基促进的环化作用转化成硫代乙内酰脲-融合的四氢吡嗪。