Synthesis of chromeno[2′,3′:4,5]imidazo[2,1-a]isoquinolines via a novel domino reaction of isoquinoline-derived immonium salts. Scope and limitations
作者:Leonid G. Voskressensky、Alexey A. Festa、Ekaterina A. Sokolova、Alexey V. Varlamov
DOI:10.1016/j.tet.2012.04.087
日期:2012.7
A one-pot protocol towards chromeno[2′,2′:4,5]imidazo[2,1-a]isoquinoline derivatives via a domino reaction of isoquinoline-derived immonium salts and α-hydroxy aromatic aldehydes is elaborated. The scope and limitations of this reaction is discussed.
阐述了通过异喹啉衍生的铵盐与α-羟基芳香醛的多米诺反应,对一铬基[2',2':4,5]咪唑并[2,1- a ]异喹啉衍生物的一锅法方案。讨论了该反应的范围和局限性。
Novel domino reaction of N-(cyanomethyl)-5,10-dihydro[1]benzosilano[3,2-c]pyridinium salts with salicylaldehydes
作者:L. G. Voskressensky、E. A. Sokolova、A. A. Festa、V. N. Khrustalev、Nguyen Van Tuyen、Le Tuan Anh、A. V. Varlamov
DOI:10.1007/s10593-013-1272-7
日期:2013.6
5-dimethyl-10-oxo- and 10-hydroxy-10-allyldihydrobenzosilanopyridinium N-cyanomethyl salts with salicyl- and 5-bromosalicylaldehydes. It was found that in the case of the 10-allyl-10-hydroxy-dihydrobenzosilanopyridinium salts the reaction occurred at both α-positions of the pyridine fragment to form a mixture of the isomeric benzosilano[3,2-c]- and benzosilano[2,3-d]chromenoimidazo-pyridines.
通过5,5-二甲基-10-氧代和10-羟基-10-烯丙基二氢苯甲硅烷基吡啶鎓N-氰甲基甲基盐与水杨基-和5-溴水杨基醛的多米诺反应完成苯并甲硅烷基铬基亚氨基咪唑并吡啶的合成。发现在10-烯丙基-10-羟基-二氢苯并甲硅烷基吡啶鎓盐的情况下,反应在吡啶片段的两个α-位发生,形成异构体苯并甲硅烷基[3,2- c ]-和苯并甲硅烷基[ 2,3 - d ] chromenoimidazo-pyridines。