摘要:

Abstract3‐Aryl‐1‐phenyl‐2‐propen‐1‐one I reacted with ethyl phenylacetate (II) in the presence sodium ethoxide at room temperature to give the corresponding ethyl β‐aryl‐γ‐benzoyl‐α‐phenyl‐butyrate III. However,' when the same ketones were refluxed with ethyl phenylacetate, they gave the corresponding 4‐aryI‐3,6‐diphenyl‐3,4‐dihydro‐2H‐pyran‐2‐ones IV. The reactions of III and IV with hydrazine hydrate afforded the corresponding hydrazones VI and 2‐pyridones VIII, respectively. The structure and configuration of the products

ISSN:0022-152X    

DOI:10.1002/jhet.5570160101

出版商:Wiley‐Blackwell    

年代:1979

数据来源: WILEY

摘要:

AbstractLes auteurs rapportent une voie originate d'accès aux 6H‐pyrido[4,3‐b]carbazoles, qui est aisément mise en oeuvre à partir de cyclohexanones convenablement substituées. Elle réalise la fusion des synthèses de Borsche d'obtention des carbazoles et de Cranwell et Saxton de preparation de l'ellipticine, et présente le double avantage de la commodité d'accès des matières premières et d'une aromatisation effectuée dès la seconde étape. Les 7H‐pyrido[3,4‐c]‐carbazoles ne sont obtenus que lore de la preparation des de

ISSN:0022-152X    

DOI:10.1002/jhet.5570160102

出版商:Wiley‐Blackwell    

年代:1979

数据来源: WILEY

摘要:

AbstractA new one‐step facile method for the synthesis of some benzimidazole, benzoxazole and benzothiazole derivatives is described. The method involves the action of aromatic and heterocyclic selenoamides on someo‐phenylenediamine,o‐aminophenol ando‐aminothiophenol and their deri

ISSN:0022-152X    

DOI:10.1002/jhet.5570160103

出版商:Wiley‐Blackwell    

年代:1979

数据来源: WILEY

摘要:

AbstractAn easy synthesis of benzimidazoleN‐oxides, and their reactivity with organometallic reagents to give stable nitroxide radicals, are described. 1‐Hydroxy‐2‐phenylbenzimidazole does not react in spite of its tautomeric equilibrium with theN‐oxide

ISSN:0022-152X    

DOI:10.1002/jhet.5570160104

出版商:Wiley‐Blackwell    

年代:1979

数据来源: WILEY

摘要:

AbstractThe two cyclic amidomethylene resorcinols,3aand3b, readily undergo cyclization with acetaldehyde to the azacannabinoids4and6, respectively. However, the acyclic amidomethylene resorcinol10, under the same conditions, gives the benzodioxan11. This contrasting behavior is rationalized in terms of conformational differences between3a,band10.

ISSN:0022-152X    

DOI:10.1002/jhet.5570160105

出版商:Wiley‐Blackwell    

年代:1979

数据来源: WILEY

摘要:

AbstractCarbon‐13 chemical shifts are reported for methaqualone, seven hydroxylated methaqualone metabolites, and four acetate derivatives. The signals are assigned on the basis of chemical shift theory, SFORD multiplicities, signal intensities, and comparisons with model compound

ISSN:0022-152X    

DOI:10.1002/jhet.5570160106

出版商:Wiley‐Blackwell    

年代:1979

数据来源: WILEY

摘要:

AbstractThe synthesis of the novel tricyclic ring 5‐rnethyl‐4‐oxo‐2,3,4,5‐tetrahydrothiopyrano[3,2‐c]‐[1,2]benzothiazine 6,6‐dioxide (III) is described.By the reaction of hydrazine and hydroxylamine with the glyoxylate (IV) and ester (V) obtained from III, several polyazadithiasteriod analogues have b

ISSN:0022-152X    

DOI:10.1002/jhet.5570160107

出版商:Wiley‐Blackwell    

年代:1979

数据来源: WILEY

摘要:

AbstractBenzoyl bromide (2‐nitrophenyl) hydrazone (2) was treated with sodium ethoxide and ethyl cyanoacetate and two unexpected products were obtained. These products were ultimately shown to be 6‐bromo‐3‐phenyl‐1,2,4‐benzotriazine (32) and 5‐bromo‐2‐phenylbenzoxazole (38), by comparison with authentic samples which were synthesized. A mechanism is presented for the formation of these two heterocyclic systems (

ISSN:0022-152X    

DOI:10.1002/jhet.5570160108

出版商:Wiley‐Blackwell    

年代:1979

数据来源: WILEY

摘要:

AbstractIl est montré que la cyclodéshydratation des hexanediols‐2,5 en diméthyl‐2,5 tétrahydrofurannes peut ětre effectuée au moyen du chlorure ou du bromure de pyridinium, aussi bien qu'avec n'importe quel autre réactif précédemment utilise' pour cela. On détermine les diverses réactions secondares qui accompagnent alors cette cyclodéshydratation et on précise par quels mécanisme

ISSN:0022-152X    

DOI:10.1002/jhet.5570160109

出版商:Wiley‐Blackwell    

年代:1979

数据来源: WILEY

摘要:

AbstractBy way of a photo‐induced selenolester‐seleninone rearrangement, the derivative 5 of a new heterocyclic ring system, 9H‐cyclopenta[b][1]benzoselenin, has been formed. This rearrangement occursviaa new photosubstitution reaction ofS‐aryl‐ in competition withSe‐aryl‐groups, followed by photocyclization using2‐p‐tolythiocyclopentene ‐1 ‐ selenocarbonic acidSe‐p‐tolylester (1a) as starting materials. As a competing product in this photo‐rearrangement, a second heterocycle, 7‐methylcyclopenta[b] [1]benzothiopyrone (4) (9) has been formedviaan intramolecular photoche

ISSN:0022-152X    

DOI:10.1002/jhet.5570160110

出版商:Wiley‐Blackwell    

年代:1979

数据来源: WILEY