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31. |
Reactions of 2 ‐dichloromethylbenzimidazole with certain primary amines |
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Journal of Heterocyclic Chemistry,
Volume 15,
Issue 1,
1978,
Page 141-144
Robert A. Pascal,
Steven Jungk,
G. E. Risinger,
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摘要:
AbstractAn investigation of the reactions of 2,2‐dichloromethylbenzimidazole with primary amines has led to the synthesis of 2(N‐t‐butylformimidoyl)benzimidazole, 2‐N‐(2‐phenylethyl)formimdoylbenzimidazole, and 1‐(ethoxyearbonylmethyl)‐2‐(N‐t‐butylformimidoyl)benzimidazole. Under mild alkali conditions, 2,2‐dichloromethylbenzimidazole was rapidly converted into a dimer, namely, 6H,13H‐pyrazino[1,2‐a:4,5‐
ISSN:0022-152X
DOI:10.1002/jhet.5570150131
出版商:Wiley‐Blackwell
年代:1978
数据来源: WILEY
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32. |
Influence d'une fonction ester ou acide portée par la chaîne alcoxyle sur la réactivité des sels deN‐alcoxypyridinium envers les ions cyanures |
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Journal of Heterocyclic Chemistry,
Volume 15,
Issue 1,
1978,
Page 145-148
Henri Sliwa,
André Tartar,
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摘要:
AbstractL'étude de la réactivité, vis à vis des ions cyanures, de sels deN‐alcoxypyridinium portant une, fonction ester en ‐α dans leur chaine alcoxyle, montre que la formation de cyanopyridines est concurrencée par une décomposition en pyridine et ester α‐carbonylé, dont l'importance croît avec l'acidité de l'hydrogène‐α de cette chaîne alcoxyle. Une réactivité normale s'observe pour le sel3à carbone ‐α tertiaire, malgré l'encombrement stérique qu'il présente, et qui entraîne un accroissement de la proportion de cyano‐4 pyridine formée, au détriment de la cyano‐2 pyridine isomère. Les sels à fonction acide en ‐α ou en ‐β présentent une réactivité considérable‐ment plus faible, résultant d'une diminution dupH du milieu réactionnel et de la formation d'une bétaïne, moins réactive que l'ion pyridinium. L'existence de cette bétaïne sous une conformation repliée rendrait compte d'une réactivité relati
ISSN:0022-152X
DOI:10.1002/jhet.5570150132
出版商:Wiley‐Blackwell
年代:1978
数据来源: WILEY
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33. |
Alcoylation d'acridanone‐9. Premiers exemples deO‐alcoylation dans cette série de composés |
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Journal of Heterocyclic Chemistry,
Volume 15,
Issue 1,
1978,
Page 149-153
Christiane Blanchard,
Jean‐Marc Fabre,
Claude Montginoul,
Brat Ali Chaffia,
Eliane Torreilles,
Louis Giral,
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摘要:
AbstractLes résultats de différentes réactions de substitution de la méthoxy‐2 acridanone‐9 ont été interprétés sur la base d'une compétition entre les deux sites nucléophilesNetOde la molécule. Ils constituent les premiers exemples deO‐alcoylation d'acridano
ISSN:0022-152X
DOI:10.1002/jhet.5570150133
出版商:Wiley‐Blackwell
年代:1978
数据来源: WILEY
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34. |
Synthesis of 3‐N‐acetyl‐N‐arylaminoacetyl‐4‐ethoxycarbonyl‐5‐methylpyrazoles |
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Journal of Heterocyclic Chemistry,
Volume 15,
Issue 1,
1978,
Page 155-158
Bernard Chantegrel,
Suzanne Gelin,
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摘要:
AbstractThe acetylation of 2‐N‐arylaminomethylene‐4‐ethoxycarbonyl(or acetyl)‐5‐melhyl‐3(2H)furan‐ones producesN‐acetylated compounds which react with hydrazine to yield subs
ISSN:0022-152X
DOI:10.1002/jhet.5570150134
出版商:Wiley‐Blackwell
年代:1978
数据来源: WILEY
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35. |
Condensed benzopyrans II. Some derivatives of 3H‐pyrano[3,2‐f]quinoline |
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Journal of Heterocyclic Chemistry,
Volume 15,
Issue 1,
1978,
Page 159-160
Misbahul Ain Khan,
André Luis Gemal,
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摘要:
AbstractThe reaction of 6‐aminoeoumarin with some ethoxymethylene compounds and dimethyl acetylenedicarboxylate led to condensation products which on thermal cyclizations afford new derivatives of 3H‐pyrano[3,2‐f]quinoline (IIa
ISSN:0022-152X
DOI:10.1002/jhet.5570150135
出版商:Wiley‐Blackwell
年代:1978
数据来源: WILEY
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36. |
Quinazolines and 1,4‐benzodiazepines LXXXII. Reaction of 2‐hydrazino‐benzodiazepines with 1,3‐diearbonyl compounds |
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Journal of Heterocyclic Chemistry,
Volume 15,
Issue 1,
1978,
Page 161-163
Armin Walser,
Gladys Zenchoff,
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摘要:
AbstractThe 2‐hydrazinobenzodiazepines1were reacted with acelylacelone to form the hydroxy‐pyrazolines2which were converted to the triazolobenzodiazcpines6and the 2‐pyrazolyl‐benzodiazepine4. Ring cleavage of the hydrazone8obtained from cyclohexane‐1,3‐dione and1aled similarly to the 1‐(4‐oxopentyl)triazolol)
ISSN:0022-152X
DOI:10.1002/jhet.5570150136
出版商:Wiley‐Blackwell
年代:1978
数据来源: WILEY
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37. |
Carbon‐13 magnetic resonance spectra of cocaine metabolites and derivatives |
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Journal of Heterocyclic Chemistry,
Volume 15,
Issue 1,
1978,
Page 165-166
John K. Baker,
Ronald F. Borne,
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摘要:
AbstractThe carbon‐13 nmr spectral assignments oi cocaine,O‐benzoylecgonine, ecgonine, norcocaine,O‐benzylnorecgonine, norecgonine, andN‐allylnorcocaine were made. The assignments were primarily based on the correlation of substituent effects within series and selective proton irradiation
ISSN:0022-152X
DOI:10.1002/jhet.5570150137
出版商:Wiley‐Blackwell
年代:1978
数据来源: WILEY
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38. |
Reduction studies on benzaza[3.3.3]propellanc derivatives |
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Journal of Heterocyclic Chemistry,
Volume 15,
Issue 1,
1978,
Page 167-169
E. Campaigne,
R. K. Mehra,
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摘要:
AbstractSodium borohydride reduction of 3‐methyl‐2,3‐dioxo‐7,8‐benzo‐3‐aza[3.3.3]propellan‐6‐one (1b) gave 2,4‐dioxo‐3‐methyl‐7,8‐benzo‐3‐aza[3.3.3]propellan‐6‐ol, while lithium aluminum hydride reduction gave 3‐methyl‐7,8‐benzo‐3‐aza[3.3.3]propellan‐6‐ol, which on oxidation, gave the corresponding ketone. This ketone formed the corresponding thioketal upon reaction with 1,2‐ethanedithiol. Raney nickel desulfurization of the thioketal provided 3‐methyl‐6,7‐benzo‐3‐aza[3.3.3]propellane. The same compound was also obtained in poor yield by forming the thioketal of Ib followed by lithium aluminum hydride reduction and Raney nickel desulfurization of the product. Desulfurization of the th
ISSN:0022-152X
DOI:10.1002/jhet.5570150138
出版商:Wiley‐Blackwell
年代:1978
数据来源: WILEY
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39. |
The synthesis of 7,8‐dihydroimidazo[1,2‐e]pyrazolo[1,5‐a]‐1,3,5‐triazines, 8,9‐dihydro‐7H‐pyrimido[1,2‐e]pyrazolo[1,5‐a]‐1,3,5‐triazines and 7,8,9,10‐tetrahydro[1,3]diazepino[1,2‐e]pyrazolo[1,5‐a]triazines |
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Journal of Heterocyclic Chemistry,
Volume 15,
Issue 1,
1978,
Page 171-173
I. Lalezari,
S. Sadeghi‐Milani,
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摘要:
AbstractCyclic hydrazino amidines were converted to the corresponding aminopyrazolyl derivatives. Ring closure between the amino groups of pyrazoline moieties and NH groups of cyclic amidines afforded the following ring systems: 7,8‐Dihydroimidazo[1,2‐e]pyrazolo[1,5‐a]‐1,3,5‐triazines, 8,9‐dihydro‐7H‐pyrimido[1,2‐e]pyrazolo[1,5‐a]‐1,3,5‐triazines and 7,8,9,10‐tetrahydro[1,3]diazepino[1,2‐e]pyra
ISSN:0022-152X
DOI:10.1002/jhet.5570150139
出版商:Wiley‐Blackwell
年代:1978
数据来源: WILEY
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40. |
Synthesis of 10‐(substituted phenylhydrazonoacetyl)phenothiazines as possible anticonvulsants |
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Journal of Heterocyclic Chemistry,
Volume 15,
Issue 1,
1978,
Page 175-176
S. P. Singh,
S. Kumar,
B. R. Pandey,
S. S. Parmar,
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摘要:
AbstractSome 10‐(substituted phenylhydrazonoacetyl)phenothiazines were synthesized as possible anticonvulsants. These compounds were investigated for their anticonvulsant activity and inhibitory effects on the oxidation of pyruvic acid by rat brain homogenate
ISSN:0022-152X
DOI:10.1002/jhet.5570150140
出版商:Wiley‐Blackwell
年代:1978
数据来源: WILEY
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