Synthesis and domino reactions of polymethylene‐3‐cyanopyridine‐2(1
<i>Н</i>
)‐thiones
作者:Anatoliy M. Shestopalov、Lyudmila A. Rodinovskaya、Andrey A. Zubarev、Vladimir N. Nesterov、Bogdan I. Ugrak、Tatyana Ya. Dutova
DOI:10.1002/jhet.3836
日期:2020.2
4‐chloroacetoacetic ester were introduced into the domino SN2 → Thorpe‐Ziegler → Guareschi‐Thorpe reaction to synthesize tetracyclic dipyridothiophenes. Starting from these compounds, 8,9‐polymethylenepyranothienodipyridines were also synthesized by the domino Knoevenagel → Michael → hetero‐Thorpe‐Ziegler reaction. Furthermore, a method for the synthesis of thienodipyridine annulated to the steroid skeleton
一种新的和容易的三组分方法用于合成聚-3-氰基吡啶-2(1的展开Н由多米诺Knoevenagel反应→迈克尔从环烷酮,氰基硫代,和polymethoxy取代苯甲醛→heterocyclization→脱氢反应)-thiones。发现最后的脱氢步骤涉及亚芳基氰基硫代乙酰胺。将所得吡啶硫酮和4-氯乙酰乙酸酯引入多米诺S N中2→Thorpe-Ziegler→Guareschi-Thorpe反应合成四环二吡啶并噻吩。从这些化合物开始,还通过多米诺Knoevenagel→迈克尔→异索普-齐格勒反应合成了8,9-聚亚甲基吡喃并二吡啶。此外,提出了一种合成甾族化合物环化的噻吩并吡啶的方法。