1972
DOI: 10.1002/ange.19720840307
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Dehydro‐N‐Mannich‐Basen

Abstract: are filtered off under suction and recrystallized twice from ethanol; yield 89%, m. p. 156--160°C.( 3 a ) (1.35 g, 5 mmol) is added at room temperature to concentrated hydrochloric acid (25 ml) ; after 3 minutes' stirring the precipitate of ( 5 ) is recovered by filtration (glass suction filter). The crude crop of ( 5 ) is recrystallized from CCl,/CHCl, (or glacial acetic acid); yield 68-75%, m. p.

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Cited by 10 publications
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“…Erhitzt man die 2,4,6-Triaryl-pyryliumsalze la4 mit Benzimidazol-2-yl-acetonitril in Gegenwart von Natriummethanolat in methanolischer Losung, erfolgt im Unterschied zur Umsetzung mit Pyridylacetonitrilen keine 2, [3]) zahlreiche weitere Pyrido-[ 1,2-a]benzimidazolderivate [5][6][7]11,12] synthetisiert wosden.…”
Section: Ring Transformations Of Heterocyclic Compounds V Pyrido[ 1unclassified
“…Erhitzt man die 2,4,6-Triaryl-pyryliumsalze la4 mit Benzimidazol-2-yl-acetonitril in Gegenwart von Natriummethanolat in methanolischer Losung, erfolgt im Unterschied zur Umsetzung mit Pyridylacetonitrilen keine 2, [3]) zahlreiche weitere Pyrido-[ 1,2-a]benzimidazolderivate [5][6][7]11,12] synthetisiert wosden.…”
Section: Ring Transformations Of Heterocyclic Compounds V Pyrido[ 1unclassified