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Dimerization of pyrazolyl??5??hydroxypyrrolidinones to tetrazocines
: Brinkmeyer, Raymond S.; Terando, Norman H. Journal of Heterocyclic Chemistry, 1989 , vol. 26, p. 1713 - 1717
Abstract The dimerization of the hydroxypyrrolidinones 5 and 9 yield the tetrazocines 8 and 11. In addition, in the case of compound 9, the ring-fused hexaazacyclododecane 12 was isolated. X-ray diffraction analysis of compound 11 verified the dimeric structu... |
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n??Butyllithium??mediated reactions of 1??(2??azidoarylmethyl)??1H??benzotriazoles with alkyl halides
: Journal of Heterocyclic Chemistry, , vol. 47, # 1 p. 98 - 111
... Journal of Heterocyclic Chemistry: Previous article in issue: Unusual anisotropic effects from 1,3-dipolar cycloadducts of 4 ... J. Heterocyclic Chem., 2010. ... of nitrene [3]. Nitrene is known as a useful reactive species for the synthesis of nitrogen-c... |
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Study of the reactivity of α??acylenaminoketones. Synthesis of pyrazoles
: Journal of Heterocyclic Chemistry, , vol. 38, # 1 p. 109 - 123
... J. Heterocyclic Chem., 38, 109 (2001). ... Amongst pyrazole derivatives, C-aminopyrazoles are the most used in heterocyclic chemistry as starting materials because of their ... of the different ways that the two ketonic carbonyls could react; different ki... |
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Die polonovski??reaktion an 3, 4??dihydro??4??methyl??2H??1, 4??benzoxazin??2??carbonsäurederivaten; ein neuer syntheseweg zu 4H??1, 4??benzoxazinen. 10. Mitteilung …
: Bartsch, Herbert; Schwarz, Otto Journal of Heterocyclic Chemistry, 1982 , vol. 19, p. 1189 - 1193
Abstract Die Dihydro-1, 4-benzoxazin-2-carbonsäurederivate 4a, 5 und 6, deren Darstellung beschrieben wird, liefern bei der Umsetzung nach einer Variante der Polonovski-Reaktion unterschiedliche Resultate. Aus 4a werden neben 9 der Ester 7 sowie 8 erhalten, w... |
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On the reaction of 2??chloroethylisothiocyanate with aromatic amines
: Outcalt, Russell J. Journal of Heterocyclic Chemistry, 1987 , vol. 24, p. 1425 - 1428
Abstract The reaction of aromatic amines with 2-chloroethylisothiocyanate 2 to give 2- arylaminothiazolines 1 was investigated. The course of this reaction was found to depend on the electronic nature of the amine and the reaction conditions. With arylamines ... |
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Aminopyrazoles. IV. Pyrazol??3??and 5??amines from 2, 3??dihaloalkanenitriles or 3??chloroacrylonitriles and hydrazines
: Ege, Guenter; Franz, Hermann Journal of Heterocyclic Chemistry, 1982 , vol. 19, p. 1267 - 1273
Nov-Dec 1982 Aminopyrazoles. IV. 1269 Table Preparation of Pyrazol-3-amines 4 and (or) -5-amines 5 4 Í3-NH, 64 65.5 (130/0.6) 211 (a) 11.5 88-89 160 (a) 84 65.5-68 (98/3) 4,5 R' R4 R5 in 4 or Method Yield Mp (°С) 'H NMR (deuteriochloroform) Kef R3 in 5 % (Ьр/... |