Synthesis, X-ray Structure, and Pharmacological Activity of Some 6,6-Disubstituted Chromeno[4,3-b]- and Chromeno- [3,4-c]-quinolines
作者:Mohamed I. Hegab、Abdel-Samee M. Abdel-Fattah、Nabil M. Yousef、Hany F. Nour、A. M. Mostafa、Mohey Ellithey
DOI:10.1002/ardp.200700089
日期:2007.8
Some chromeno[4,3‐b]quinolines 4a–i were obtained from β‐chloro carboxyaldehydes 3a–c with different aniline derivatives namely, aniline, 4‐fluoroaniline, and 2‐aminophenol. Surprisingly, 3a–c reacted with 2‐aminothiophenol and afforded the chromeno[3,4‐c]quinoline derivatives 5a–c. Single‐crystal X‐ray diffraction studies of 4e and 5b provided good support for the established structure. Compounds
4-Chloro-2,2-disubstituted Chromen-3-carboxaldehyde: Synthesis of some Fused Polycyclic Heterocycles as Anti-inflammatory, Analgesic, Anticonvulsant, and Antiparkinsonian Agents
作者:Mohamed I. Hegab、Mohamed M. Abdulla
DOI:10.1002/ardp.200500124
日期:2006.1
Some new aldazino 4, pyrazolo 5, thieno 8, and thiooxopyrimidino chromenes 10 were prepared via reaction of the corresponding β‐chlorocarboxaldehyde 3 with hydrazine hydrate, mercaptoacetic acid, and thiourea, respectively. Wherever, 4‐chlorochromene derivatives 2 along with 4‐chlorochromen‐3‐carboxaldehyde derivatives 3 were prepared from the corresponding ketone 1 with Vilsmeier‐Haack reagent. Some