The condensation of active methylene reagents with salicylaldehyde:: Novel synthesis of chromene, azaanthracene, pyrano[3,4-c]chromene and chromeno[3,4-c]pyridine derivatives
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作者:
Abu Elmaati, TM
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Fac Appl Arts, Dumyat, EgyptFac Appl Arts, Dumyat, Egypt
On heating of the cyanoacetic acid cyclopentylidene hydrazide I with salicylaldehyde in the presence of bases the azaanthracene derivative 6 was formed. Also, reaction of 3 with malononitrile and ketones 10a,b afforded the pyrano[3,4-c]chromene 9 and chromeno[3,4-c]pyridine 11 respectively. A mechanism for these reactions is proposed.
机构:
ML Sukhadia Univ, Dept Chem, Synthet Organ Chem Res Lab, Udaipur 313001, IndiaML Sukhadia Univ, Dept Chem, Synthet Organ Chem Res Lab, Udaipur 313001, India
Sharma, Chirag
Thadhaney, Bhawana
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ML Sukhadia Univ, Dept Chem, Synthet Organ Chem Res Lab, Udaipur 313001, IndiaML Sukhadia Univ, Dept Chem, Synthet Organ Chem Res Lab, Udaipur 313001, India
Thadhaney, Bhawana
Pemawat, Gangotri
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ML Sukhadia Univ, Dept Chem, Synthet Organ Chem Res Lab, Udaipur 313001, IndiaML Sukhadia Univ, Dept Chem, Synthet Organ Chem Res Lab, Udaipur 313001, India
Pemawat, Gangotri
Talesara, G. L.
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ML Sukhadia Univ, Dept Chem, Synthet Organ Chem Res Lab, Udaipur 313001, IndiaML Sukhadia Univ, Dept Chem, Synthet Organ Chem Res Lab, Udaipur 313001, India
Talesara, G. L.
INDIAN JOURNAL OF CHEMISTRY SECTION B-ORGANIC CHEMISTRY INCLUDING MEDICINAL CHEMISTRY,
2008,
47
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: 1892
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1897