Multicomponent assembling of imidazole N -oxides, aldehydes and CH-acids: A simple and efficient approach to newly functionalized imidazole derivatives
作者:Vitaly S. Mityanov、Anton V. Kutasevich、Michail M. Krayushkin、Boris V. Lichitsky、Arkady A. Dudinov、Andrey N. Komogortsev、Tatyana Yu. Koldaeva、Valery P. Perevalov
DOI:10.1016/j.tet.2017.10.026
日期:2017.11
An efficient and simple method for C2-functionalization of 2-unsubstituted imidazole N-oxides has been developed. It consists at the condensation of 2-unsubstituted imidazole N-oxides with aldehydes and CH-acids. This method permits broad variations in the structure of starting materials.
Synthesis of highly functional imidazole derivatives via assembly of 2-unsubstituted imidazole N-oxides with CH-acids and arylglyoxals
作者:Valery P. Perevalov、Vitaly S. Mityanov、Boris V. Lichitsky、Andrey N. Komogortsev、Ludmila G. Kuz’mina、Tatyana Yu. Koldaeva、Vladimir S. Miroshnikov、Anton V. Kutasevich
DOI:10.1016/j.tet.2020.130947
日期:2020.2
A novel and convenient method for the synthesis of a wide range of polyfunctional imidazolederivatives based on the three-component condensation of imidazole N-oxides with CH-acids and arylglyoxals has been developed. This reaction proceeds smoothly in moderate-to-good yields with a wide range of starting materials.
Three-component cascade reaction of 3-ketonitriles, 2-unsubstituted imidazole N-oxides, and aldehydes
作者:Ekaterina S. Uvarova、Anton V. Kutasevich、Egor S. Lipatov、Ivan S. Pytskii、Oleg A. Raitman、Yuriy M. Selivantev、Vitaly S. Mityanov
DOI:10.1039/d4ob00353e
日期:——
A three-component condensation of 2-unsubstituted imidazole N-oxides, 3-ketonitriles, and aldehydes is described. The reaction proceeds via sequential Knoevenagel condensation/Michael addition under mild, catalyst-free conditions with various substrates. Furthermore, the corresponding 2-functionalized imidazole N-oxides can be further dehydrated to (Z)-2-aroyl-3-(1H-imidazol-2-yl)-acrylonitriles, which
描述了2-未取代的咪唑N-氧化物、3-酮腈和醛的三组分缩合。该反应通过连续的克诺文格尔缩合/迈克尔加成在温和、无催化剂的条件下与各种底物进行。此外,相应的2-官能化咪唑N-氧化物可以进一步脱水为( Z )-2-芳酰基-3-( 1H-咪唑-2-基)-丙烯腈,也可以通过改变反应条件直接制备作为克诺文格尔缩合/迈克尔加成/脱水的级联。