Synthesis and characterization of poly(2,6-dimethyl-4-phenyl-1,4-dihydropyridinyl)arenes as novel multi-armed molecules

Facile One‐pot, Three‐component Synthesis of Novel Bis‐heterocycles Incorporating 5H‐chromeno[2,3‐b]pyridine‐3‐carbonitrile Derivatives

“…During our continuous efforts on the development of useful multi‐component domino reactions , herein, we would like to report another highly efficient approach to multi‐functionalized bis‐chromeno[2,3‐ b ]pyridine derivatives. Thus, base‐promoted three‐component domino [3 + 2 + 1] intramolecular six‐membered heterocyclization of aldehydes 1 with 2‐aminoprop‐1‐ene‐1,1,3‐tricarbonitrile 2 and dimedone 3 leads to the formation of fused chromeno[2,3‐ b ]pyridine skeleton 4 and 5 with concomitant formation of two new chromene and pyridine rings (Scheme ).…”

Bis(enaminones) as Versatile Precursors for Novel Bis([1,2,4]triazolo[1,5‐a]pyrimidines) and Bis(2‐thioxo‐2,3‐dihydropyrido[2,3‐d]pyrimidin‐4(1H)‐ones)

“…In the last decades, our group has been heavily involved in a program aiming at exploring the synthetic potentiality of functionally substituted enamines . In continuation to this work, and in conjunction to our interest in the chemistry of bis(heterocycles) , we report herein on the reactivity patterns of enamines towards 1 H ‐1,2,4‐triazol‐5‐amine and 6‐amino‐2‐thioxopyrimidin‐4‐one.…”

“…). Enamines are used as intermediates for carbon–carbon bond formation reactions that include Michael addition , Hantzsch , and Biginelli reactions . Moreover, bis(heterocycles) have been reported to display wide range of bioactivities including antihypertensive , anticancer activities , and antiallergenic .…”

Novel Bis(2‐cyanoketene‐S,S‐/S,N‐acetals): Versatile Precursors for Novel Bis(aminopyrazole) Derivatives

“…Motivated by these findings and in conjunction with our ongoing research work on bis(heterocycles) as well as poly(heterocycles) [37][38][39][40][41][42][43][44][45][46][47][48][49][50], we report herein on the synthesis of novel bis(substituted pyrazole) derivatives starting from novel bis(ketene-N,S-acetals).…”