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1. |
Chemistry of adamantane. Part XI1,2‐Disubstituted adamantanes. Synthesis and reactions of adamantano[2,1‐b]‐ and protoadamantano‐[4,5‐b] [1,5]benzodiazepines |
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Journal of Heterocyclic Chemistry,
Volume 15,
Issue 5,
1978,
Page 705-710
Jiban K. Chakrabarti,
Terrence M. Hotten,
David E. Tapper,
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摘要:
AbstractThe synthesis and reactions of adamantano[2,1‐b]‐and protoadamantano[4,5‐b][ 1,5]benzo‐diazepines are described. 12,13‐Dihydro‐1 1aH‐protoadamantano[4,5‐b ][ 1,5]benzodiazepin‐12‐one (15) rearranged to 2,3‐dihydro‐l‐(protoadamant‐4‐en‐4‐yl)benzimidazol‐2‐one (22). This rearrangement does not proceed with 2‐fluoro‐5,5a,12,13‐tetrahydroadamantano[2,1‐b][ 1,5]‐benzodiazepin‐12‐one (2c) under similar conditions due to its inability to form an olefinic bond at C5a.A convenient method for the α‐carboxylation of k
ISSN:0022-152X
DOI:10.1002/jhet.5570150501
出版商:Wiley‐Blackwell
年代:1978
数据来源: WILEY
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2. |
A synthesis of pyrrolo[ 3,2,1‐kl] phenothiazine and derivatives |
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Journal of Heterocyclic Chemistry,
Volume 15,
Issue 5,
1978,
Page 711-713
Richard A. Hollins,
Angelo C. Pinto,
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摘要:
AbstractA synthesis of pyrrolo[3,2,1‐kl]phenothiazine (1) is described. Electrophilic substitution of 1 leads to functionalization at the 2 positio
ISSN:0022-152X
DOI:10.1002/jhet.5570150502
出版商:Wiley‐Blackwell
年代:1978
数据来源: WILEY
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3. |
Systèmes aromatiques à 10 électrons π dérivés de l'aza‐3a pentalène. XXXII. Recherches dans la série du pyrazolo[1,5‐a]benzimidazole |
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Journal of Heterocyclic Chemistry,
Volume 15,
Issue 5,
1978,
Page 715-720
René Lazaro,
José Elguero,
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摘要:
AbstractLe probleme de l'aromatiuité d'un dérivé aza‐3a pentalénique, le méthyl‐2 pyrazolo[1,5‐a]‐benzimidazole, a été abordé par 1′étude de sa réactivité comparée à celle d'un produit modèle, le phényl‐1 méthyl‐3 amino‐5 pyrazole. La mono‐ et diprotonation, l'alcoylation, la quater‐narisation, la formylation, l'acétylation et le comportement des dérivésN‐acétylés ont été examinés. On eonclue
ISSN:0022-152X
DOI:10.1002/jhet.5570150503
出版商:Wiley‐Blackwell
年代:1978
数据来源: WILEY
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4. |
Chemistry of the phenoxathiins V. Correlation of the crystal and molecular structure with pharmacologic activity associated with 7‐ and 8‐chloro‐l‐azaphenoxathiin |
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Journal of Heterocyclic Chemistry,
Volume 15,
Issue 5,
1978,
Page 721-729
Gary E. Martin,
James C. Turley,
James D. Korp,
Ivan Bernal,
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摘要:
AbstractThe crystal and molecular structure of the 7‐ and 8‐chloro analogs of the 1‐azaphenoxathiin system are described. In contrast to previous compounds possessing antipsychotic type activity, the title compounds are both nearly planar, and demonstrate significant substituent location sensitivity, with the 7‐chloro analog exhibiting significant biologic activity while the 8‐chloro isomer is nearly devoid of activity. The relationship of these compounds to the isosterically related phenothiazines in terms of design and molecular geometry considerations is also
ISSN:0022-152X
DOI:10.1002/jhet.5570150504
出版商:Wiley‐Blackwell
年代:1978
数据来源: WILEY
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5. |
On the synthesis and animation of 5‐chloro‐and 5‐bromo‐1,7‐naphthyridine |
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Journal of Heterocyclic Chemistry,
Volume 15,
Issue 5,
1978,
Page 731-736
M. Woźaniak,
H. C. van der Plas,
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摘要:
AbstractA new synthesis of 5‐chloro‐ and 5‐bromo‐1,7‐naphthyridine, using 8‐amino‐1,7‐naphthyridine as starting material is described. On amination with potassium amide in liquid ammonia, the 5‐bromo compound undergoes a tele‐amination into 8‐amino‐ and 2‐amino‐1,7‐naphthyridine and a Chichibabin reaction yielding 8‐amino‐5‐bromo‐1,7‐naphthyridine. The reaction with the 5‐chloro compound occurs at a much lower rate than the 5‐bromo compound and only gives 8‐amino‐5‐chloro‐1,7‐naphthyridine in a small yield. Convincing1H‐nmr evidence is presented, showing that the 5‐bromo‐ and 5‐chloro‐1,7‐naphthyridine give addition of the amide ion at position 8
ISSN:0022-152X
DOI:10.1002/jhet.5570150505
出版商:Wiley‐Blackwell
年代:1978
数据来源: WILEY
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6. |
The knoevenagel condensation of ethyl acylpyruvates |
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Journal of Heterocyclic Chemistry,
Volume 15,
Issue 5,
1978,
Page 737-743
Takushi Kurihara,
Yasuhiko Sakamoto,
Toshio Kobayashi,
Masanobu Mori,
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摘要:
AbstractExtensive studies of the Knoevenagel condensation of aromatic aldehydes and active methyl‐lene compounds have been reported (2). In 1894, Knoevenagel reported (3) the reaction of benz‐aldehyde with ethyl benzoylpyruvate in the presence of piperidine to give ehtyl benzyl‐(bis‐benzoyl)pyruvate, m.p. 162°, but no yield of the product was reported. This paper deals with the interesting results of the reactions of ethyl acetylpyruvate (2) (4) and ethyl benzoylpyruvate (3) (5) with some aromatic aldehyde
ISSN:0022-152X
DOI:10.1002/jhet.5570150506
出版商:Wiley‐Blackwell
年代:1978
数据来源: WILEY
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7. |
Un nouvel hétérocycle telluré: le benzisotellurazole‐1,2. 2. Structure cristalline et moléculaire du benzisoselenazole‐1,2 et du benzisotellurazole‐1,2 |
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Journal of Heterocyclic Chemistry,
Volume 15,
Issue 5,
1978,
Page 745-748
Henri Campsteyn,
Léon Dupont,
Josette Lamotte‐Brasseur,
Marcel Vermeire,
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摘要:
AbstractLa détermination de la structure cristalline du benzisoselenazole‐1,2 et du benzisotellurazole‐1,2 a permis d'expliquer les proprietes physiques inattendues (point de fusion et solubilité) du dernier composé. Les anomalies observées résultent de l'existence, dans I'empilement du dérivé telluré, de liaisons intermoléculaires Te … N extrěmement
ISSN:0022-152X
DOI:10.1002/jhet.5570150507
出版商:Wiley‐Blackwell
年代:1978
数据来源: WILEY
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8. |
Zur darstellung der l‐(diazinyl)‐2‐(pyridyl)‐äthene (triazastilbene) |
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Journal of Heterocyclic Chemistry,
Volume 15,
Issue 5,
1978,
Page 749-752
H. Felbecker,
D. Hollenberg,
R. Schaaf,
Th. Bluhm,
H.‐H. Perkampus,
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摘要:
AbstractIn Weiterführung unserer Untersuchungen an Azaanalogen des Stilbens warden die 18 isomeren l‐(Diazinyl)‐2‐(pyridyl)‐äthene (Triazastilbene) dargestellt. Zur Diskussion der Aktivierung der Methylgruppen und der Carbonylgruppen bei den Edukten für die Aldolkondensation wurden die Ergebnisse von Elektronendichteberechnungen nach der CNDO/2‐Methode
ISSN:0022-152X
DOI:10.1002/jhet.5570150508
出版商:Wiley‐Blackwell
年代:1978
数据来源: WILEY
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9. |
Réaction d'horner‐wittig: Synthése de vinylsulfones à partir d'aldéhydes et de cétones hétérocycliques |
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Journal of Heterocyclic Chemistry,
Volume 15,
Issue 5,
1978,
Page 753-757
Houda Fillion,
Marie‐Hélene Péra,
Jean‐Luc Rappa,
Cuong Luu‐Duc,
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摘要:
AbstractDes vinylsulfones ont été obtenues par réaction de Horner et Wittig entre le carbanion d'un diéthylméthyl‐sulfonométhyl‐phosphonate et un aldéhyde ou une eétone hétérocyclique dans le tetrahydrofuranne. La réactivité des cétones dépend de leur structure et en particulicr de la nature des substituants de l'hétcrocyclc. Les sulfones α, β ethyleniques obtenues à partir des aldéhydes sont des stéreoisomères E; ceux obtenus à partir des cétones sont soit de configuration E, soit des melanges d'isomères E et Z. Leur structure a été déter
ISSN:0022-152X
DOI:10.1002/jhet.5570150509
出版商:Wiley‐Blackwell
年代:1978
数据来源: WILEY
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10. |
Reactions of acetylenic ketones with methyl α‐naphthylacetate. A synthesis of l‐amino‐2‐pyridone derivatives |
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Journal of Heterocyclic Chemistry,
Volume 15,
Issue 5,
1978,
Page 759-763
Y. A. Al‐Farkh,
F. H. Al‐Hajjar,
N. R. El‐Rayyes,
H. S. Hamoud,
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摘要:
AbstractReactions of acetylenic ketones (Ia‐f) with methyl α‐naphthylacetate in the presence of sodium methoxide gave the corresponding 6‐aryl‐3‐α‐naphthyl‐4‐phenyl‐2‐pyrones (IIa‐f) which upon refluxing with hydrazine hydrate in ethanol gave the corresponding 1‐amino‐2‐pyridone derivatives (VIa‐f).The structure of the products was established by chem
ISSN:0022-152X
DOI:10.1002/jhet.5570150510
出版商:Wiley‐Blackwell
年代:1978
数据来源: WILEY
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