Journal ArticleDOI
Synthesis and spectra of 12‐(o‐ and p‐R‐phenyl)‐9,9‐dimethyl‐7,8,9,10,11,12‐hexahydro and 8,9,10,11‐tetrahydrobenz[a]acridin‐11‐ones. Structure correction of 1,2,3,4,5,6‐hexahydro and 1,2,3,4‐tetrahydro‐2,2‐dimethyl‐5‐aryl‐6‐aza‐9,10‐benzophenanthren‐4‐ones. II
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TLDR
In this paper, the reaction of β-naphthylamine, dimedone and the appropriate aromatic aldehyde in ethanol gave 1,2,3,4,5,6-hexahydro-2,2-dimethyl-5-aryl-6-aza-9,10-benzophenanthren-4-ones, III, which upon treatement with chromic anhydride, yielded the corresponding tetrahydro derivatives, IV.About:
This article is published in Journal of Heterocyclic Chemistry.The article was published on 1990-02-01. It has received 40 citations till now. The article focuses on the topics: Dimedone & Aryl.read more
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Chitosan: An Efficient, Reusable, and Biodegradable Catalyst for Green Synthesis of Heterocycles
Pramod K. Sahu,Praveen K. Sahu,Praveen K. Sahu,Sushil K. Gupta,Dau D. Agarwal,Dau D. Agarwal +5 more
TL;DR: In this paper, a one-pot three-component reaction of substituted aromatic aldehydes, dicarbonyl- and 2-aminobenzothiazole/3-amino-1,2,4-triazole/urea/thiourea using commercially available chitosan in 2% acetic acid in aqueous media at 60-65 °C was described.
Journal ArticleDOI
An efficient ultrasound-promoted method for the one-pot synthesis of 7,10,11,12-tetrahydrobenzo[c]acridin-8(9H)-one derivatives
TL;DR: A new, efficient and general method for preparation of 7,10,11,12-tetrahydrobenzo[c]acridin-8(9H)-one derivatives using ultrasound irradiation is reported.
Journal ArticleDOI
Hydrotalcite: recyclable, novel heterogeneous catalyst for facile, environmentally benign and high yielding multi-component synthesis and mechanistic study under solvent free conditions
TL;DR: In this paper, the synthesis of 4H-pyrimido, 1,2,4-triazoloquinazolines (2a,2b), octahydroquinazolinones (3a,3b) and fused thiazolo[2,3-b]quinazoinazolone (4a,4b) was carried out in the presence of Mg-Al-CO3 and Ca-Al−CO3 hydrotalcite as a heterogeneous catalyst.
Journal ArticleDOI
Synthesis and Mechanistic Study of Triheterocyclic 4H‐Pyrimido[2,1‐b]benzothiazole derivatives, One‐Pot Three‐component Reaction under Solvent‐Free Conditions
TL;DR: In this paper, an efficient method has been developed for the preparation of 4H-pyrimido[2,1-b]benzothiazole derivatives by the condensation of aldehydes, β-ketoester, and 2-amino benzothiazoles under solvent and solvent-free conditions using various catalysts.
Journal ArticleDOI
Synthesis of 1,4-dihydropyridines in cyclocondensation reactions (review)
A Sausins,Gunars Duburs +1 more
TL;DR: The 1986-1990 literature on the formation of 1,4-dihydropyridines in the Hantzsch synthesis and other cyclocondensation reactions is summarized and correlated as mentioned in this paper.
References
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Synthesis and spectra of 7-(o- and p-R-phenyl)-10,10-dimethyl-8,9,10,11-tetrahydrobenz[c]acridin-8-ones. Structure correction of 1,2,3,4-tetrahydro-2,2-dimethyl-5-aryl-6-aza-7,8-benzophenanthren-4-ones
TL;DR: In this paper, it was reported that dimedone added to α-arylidennaphthylamines in ethanol with formation of 1,4-addition products derivatives of 5-aryl-5,6,7,8,9,10-hexahydrobenzo[c]phenanthridin-7-ones, III, which are easily oxidized by chromic anhydride to the corresponding tetrahydro derivatives, IV.
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