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  • 1
    ISSN: 1434-4475
    Keywords: Cycloalkanes ; Heterocycles ; Friedel-Crafts acylation ; Isomerization ; Methyloctahydro-anthracen-9-ones ; Reduction ; LAH/AlCl3
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Reaktion voncis-2-(4-methylbenzoyl)-cyclopropan-(1) und-cyclobutancarbonsäuren (2), der stereoisomeren cyclohexyl-Homologen (3 und4) und von di-endo-3-(4-methylbenzoyl)-bicyclo[2.2.1]heptan-2-carbonsäure (5) mit Hydrazinen ergibt die cycloalkankondensierten 3(2H)-Pyridazinone6–9 und das methylenüberbrückte di-endo-Derivat10. Die Verbindungen1 und3–5 wurden mit Hydroxylamin zu den cycloalkan- und norbornankondensierten 1,2-Oxazin-6-onen11–14 umgesetzt.3–6 reagierten zumtrans-Hexahydroanthron17a und seinem methylenüberbrückten Analogen24. Die teilweise gesättigten Anthrone wurden auch aus den stereoisomeren Hexahydro-1(3H)-isobenzofuranonen20 und21 hergestellt (16b und17b), wobei der Methylsubstituent jedoch in Position 6 lokalisiert ist. Reduktion von16b ergab das 2-Methyloctahydroanthracen22. Die Strukturen der Verbindungen wurden durch NMR-Spektroskopie abgesichert (1H,13C, DEPT, CH-COSY, NOE).
    Notes: Summary Reactions ofcis-2-(4-methylbenzoyl)-cyclopropane- (1) and-cyclobutanecarboxylic acids (2), the stereoisomeric cyclohexyl homologues (3 and4), and di-endo-3-(4-methylbenzoyl)-bi-cyclo-[2.2.1]heptane-2-carboxylic acid (5) with hydrazines yield the cycloalkane-condensed (3(2H)-pyridazinones6–9 and the norbornane di-endo-fused derivatives10. With hydroxylamine, compounds1 and3–5 were transformed to the cycloalkane- and norbornane-condensed 1,2-oxazin-6-ones11–14. Transformation of3–5 led to thetrans-hexahydroanthrone17a and its methylene-bridged analogue24. From the stereoisomeric hexahydro-1(3H)-isobenzofuranones20 and21, the partly saturated anthrones were also prepared; the products (16b and17b) contain the methyl substituent in position 6. On reduction,16b yield the 2-methyloctahydroanthracene22. The structures of the compounds were proved by1H and13C NMR spectroscopy, making use of NOE, DEPT, and CH-COSY techniques.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0749-1581
    Keywords: Ring transformation of β-lactam-condensed saturated thiaazabicycles to alicycle-fused 4,5-dihydro-1,4-thiazepines ; Synthesis ; Structure ; Configurations 1H and 13C NMR ; Conformational analysis ; DR ; DEPT ; DNOE ; 2D HSC ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: β-Lactam-condensed saturated thiaazabicycles underwent ring transformation to give a new type of alicycle-fused 3-phenyl-2-methoxycarbonyl-4,5-dihydro-1,4-thiazepine. Oxidation of the cis and trans cyclohexane derivatives with perbenzoic acid furnished sulphones. The configurations and conformations of the new compounds were confirmed by 1H and 13C NMR spectroscopy, making use of DR, DNOE, DEPT and 2D HSC measurements.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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