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1.
Zusammenfassung 4-O-Methyl-7,8-dehydro-metathebainon-methin (1) geht in alkalischer Lösung in das Naphthalin-Derivat3 über, das unter Abspaltung von Formiat7 liefert. Das Auftreten von3 kann durch Isolierung von13a nach Reduktion mit NaBH4 nachgewiesen werden. Die aus3 und7 durch Reduktion erhaltenen Alkohole8a und13a werden in saurer Lösung unter Methanol-Abspaltung zu den 2,3-Dihydro-naphtho[1,8-bc]pyranen9 und14 cyclisiert.
A new rearrangement of a metathebainone derivative with a cyclohexa-2,5-dienone groupment
4-O-Methyl-7.8-dehydrometathebainonemethine (1) in alkaline solution rearranges to the naphthalene derivative3, which eliminates formiate to give7. The occurrence of3 was confirmed by isolation of13a after reduction with NaBH4. The hydroxy compounds8a and13a, obtained by reduction, eliminate methanol and cyclize to the 2.3-dihydronaphtho[1.8-bc]pyrans9 and14.


Mit 2 Abbildungen  相似文献   

2.
Incomplete catalytic hydrogenation of [2.2]metacyclophane (1) or 5,13-dimethyl[2.2]metacyclophane (2) yields (1,2,3,3arH, 4,5,9,10,10acH, 10btH)-decahydropyrene (9) and the dimethylanalogue10, resp.via atransanular cyclisation between positions 8 and 16. Under the same reaction conditions catalytic deuteration (D2, acetic acid-d1) affords a selectively deuterated10 (10-d5).9 is identical with as-decahydropyrene, obtained by high pressure hydrogenation of pyrene. The configurations of9 and10 were established by means of13C and1H-NMR spectroscopy and by comparison with10-d5.A compound formerly believed to be as-decahydropyrene isomer is shown to be (±)-(1,2,3,3a,4,5,9,10)-octahydropyrene (4).

Mit 4 Abbildungen

Herrn Prof. Dr.F. Hecht zum 70. Geburtstag gewidmet.

Auszugsweise vorgetragen bei der Tagung des Vereins Österreichischer Chemiker in Linz am 27. September 1973.  相似文献   

3.
Zusammenfassung Es wird die Reaktion der Kondensationsprodukte (1–3) vonMeldrumsäuren mit Diazomethan in Methanol/Äther beschrieben, die zu den Cyclopropanverbindungen1 b-3 b führt. Diese Reaktionsweise ist bekannt und auch nach quantenchemischen Berechnungen des einen von uns (P. Schuster) zu erwarten.Eine neue, bisher nicht beobachtete Reaktion wurde bei der Verbindung4 gefunden. Bei verschiedenen Temperaturen führt die Reaktion mit CH2N2 in Methanol/Äther (außer zu den Verbindungen4 a und4 b) zu4 c. In CHCl3 entsteht nur4 b neben viel allem Anschein nach hochmolekularen Produkten.
The reaction is described of the condensation products ofMeldrum's acid with aldehydes1–3 2 with diazomethane in methanol/ether, which leads to the cyclopropane compounds1 b-3 b. This is a known mode of reaction and is predicted by quantum chemical calculations ofP. Schuster.A reaction hitherto unobserved was found in the case of the compound4. The reaction with CH2N2 in methanol/ether at various temperatures yields the compound4 c as well as4 a and4 b. In CHCl3 the reactions yields only4 b in addition to many other high molecular weight products.


Mit 1 Abbildung

Herrn Prof. Dr.F. Asinger zum 60. Geburtstag gewidmet.  相似文献   

4.
Zusammenfassung Saure Hydrolyse des 10-Methoxy-neopinondimethylacetalmethin-methoperchlorats (1) liefert 10-Oxo-neopinon-dihydromethin-methoperchlorat (2), das in alkal. Lösung in 10-Oxo-7,8-dehydro-metathebainon-dihydromethin-methoperchlorat (7) umgewandelt werden kann. Ein Dihydroderivat (9) des (10S)-Methoxy-codeinondimethylacetal-9 (14)-methin -methoperchlorats (8 a) wird beschrieben, aus dem durch Einwirkung von 5m-Säure Neopinon-methin-methoperchlorat (10) zugänglich wird. Der Beweis für die unter2, 7, 9 und10 angeführten Strukturen wird erbracht.
10-methoxy-des-bases of the codeinone series, II: Reactions with acid
Acidic hydrolysis of 10-methoxy-neopinonedimethylacetal-methine-methoperchlorate (1) yields 10-oxo-neopinone-dihydromethine-methoperchlorate (2), which in alkaline solution rearranges to 10-oxo-7,8-dehydro-metathebainone-dihydromethine-methoperchlorate (7). A dihydro-derivative (9) of (10S)-methoxy-codeinondimethylacetal-9 (14)-methine-methoperchlorats (8 a) is described, which by treatment with 5m-HClO4 yields neopinone-methine-methoperchlorate (10). The structures of the new compounds2, 7, 9, 10 are proved.


Mit 2 Abbildungen

Herrn Prof. Dr.O. Hromatka zum 65. Geburtstag gewidmet.

1. Mitt.:G. Heinisch undF. Vieböck, Mh. Chem.101, 1253 (1970).  相似文献   

5.
Zusammenfassung In der vorliegenden Arbeit wurde die Reaktion von 1-Nitroso-2-naphthol mit Orcin in Äther bei Anwesenheit von HNO3 studiert. Als Reaktionshauptprodukte wurden 11-Methylbenzo[a]-phenoxazon-(9) (1) sowie dessen 12-Oxid (2) isoliert. Der Reaktionsmechanismus und die Konstitution der erhaltenen Substanzen werden diskutiert. Ferner wurden auch 11-Methyl-5-hydroxy-benzo[a]phenoxazon-(9) (6), 11-Methyl-5-äthoxybenzo[a]phenoxazon-(9), 11-Methyl-5-methoxybenzo[a]phenoxazon-(9) (4), 11-Methyl-5-aminobenzo[a]phenoxazon-(9) (7) und 11-Methyl-5-anilinobenzo[a]phenoxazon-(9) (8) dargestellt.
In this paper the reaction of 1-nitroso-2-naphthol with orcin in an ether medium in presence of HNO3 is described. As main products 11-methylbenzo[a]phenoxazone-(9) (1) as well as its 12-oxide (2) were isolated. The reaction mechanism is presented. Identity of the reaction products is verified. 11-methyl-5-hydroxybenzo[a]phenoxazone-(9) (5), 11-methyl-5-methoxybenzo[a]phenoxazone-(9) (4), 11-methyl-5-aminobenzo[a]phenoxazone-(9) (7) and 11-methyl-5-anilinobenzo[a]phenoxazone-(9) (8) are prepared.


Mit 2 Abbildungen  相似文献   

6.
Zusammenfassung Durch Methylierung von 8(14)-7-Oxo-thebainon-methaperchlorat (1) wird 4-O-Methyl-salutaridin-methoperchlorat (2) erhalten, das beimHofmannabbau das Methin3 liefert. Einwirkung von konz. HCl auf2 bei Raumtemp. führt zu 7-Hydroxy-4-O-methyl-7.8-dehydro-metathebainon-methoperchlorat (4 a), aus dem beim Erwärmen mit 10n-HClO4 7-Hydroxy-4-O-methyl-morphothebain-methoperchlorat (5) entsteht. Die Strukturen von2, 3, 4 a und5 werden bewiesen.
Preparation and reactions of 4-O-methyl-salutaridinemethoperchlorate
Methylation of 8(14)-7-oxo-thebainone-methoperchlorate (1) yields 4-O-methyl-salutaridine-methoperchlorate (2), which by action of 1n-NaOH is degradated to methine3. Acidic hydrolysis of2 at room temperature yields 7-hydroxy-4-O-methyl-7.8-dehydro-metathebainone-methoperchlorate (4 a), which by heating in 10n-HClO4 solution can be rearranged to 7-hydroxy-4-O-methyl-morphothebaine-methoperchlorate (5). The structures of the new compounds2, 3, 4 a, and5 are proved.


Herrn Prof. Dr.M. Pailer zum 60. Geburtstag gewidment.  相似文献   

7.
Zusammenfassung 2-Deoxy-2,3-dehydro-N-acetylneuraminsäure-methylester wurde mit Perjodsäure zu 4-Hydroxy-5-acetylamino-6-formyl-2,3-dehydropyran-2-carbonsäure-methylester oxidiert. Nach der Reduktion mit NaBH4 erhielten wir 4-Hydroxy-5-acetylamino-6-hydroxymethyl-2,3-dehydropyran-2-carbonsäure-methylester.Vibrio cholerae-Neuraminidase wird von 4-Hydroxy-5-acetylamino-6-formyl-2,3-dehydropyran-2-carbonsäure, dereniso-Nicotinoylhydrazon sowie von 4-Hydroxy-5-acetylamino-6-hydroxymethyl-2,3-dehydropyran-2-carbonsäure gehemmt.
2-Deoxy-2,3-dehydrosialic acids, III: Inhibition of vibrio cholerac neuraminidase by oxidation products of 2-deoxy-2,3-dehydro-N-acetyl-neuraminic acid
Methyl 2-deoxy-2.3-dehydro-N-acetylneuraminate was oxidized with periodic acid to methyl 4-hydroxy-5-acetylamino-6-formyl-2.3-dehydropyran-2-carboxylate. On treatment with carbonyl reagents the aldehyde gave the expected derivatives. Upon reduction with NaBH4 methyl 4-hydroxy-5-acetylamino-6-hydroxymethyl-2.3-dehydropyran-2-carboxylate was formed.Vibrio cholerae neuraminidase was inhibited by 4-hydroxy-5-acetylamino-6-formyl-2.3-dehydropyran-2-carboxylic acid, by itsiso-nicotinoylhydrazone, and by 4-hydroxy-5-acetylamino-6-hydroxymethyl-2.3-dehydropyran-2-carboxylic acid.


Mit 3 Abbildungen

A-1121 Wien, Laskegasse 5-11.  相似文献   

8.
Pyridazine-4-carboxaldehyde (4) is prepared by NaJO4/ OsO4-oxidation of 4-styryl-pyridazine (2), which can be obtained by condensation of 4-methylpyridazine with benzaldehyde. Reactions of4 with NH-compounds and CH-acids and HCN are reported.1H-NMR-, IR- and mass spectra of the new compounds are given.

2. Mitt.:G. Heinisch, Mh. Chem.104, 1354 (1973).  相似文献   

9.
Zusammenfassung Es wird die Synthese des isomerenfreien 2,3-Methylendioxyallylbenzols (o-Safrols) (1 d) durch Einwirkung von Chlorbrommethan auf 2,3-Dihydroxy-allylbenzol (1 b) beschrieben.Durch Behandlung des 4-Hydroxy-3-methoxy-allylbenzols (3 a) mit Kaliumnitrosodisulfonat, Reduktion des entstehenden 3-Methoxy-5-allyl-o-benzochinons (4) mit Natriumdithionit und Methylenierung des 3-Methoxy-5-allyl-brenzcatechins (5) bildet sich Myristicin (3 b) in guter Ausbeute.
Derivatives of methylenedioxy-benzene, XXIV: Synthesis of o-safrole and of myristicine
Preparation of 2.3-methylenedioxy-allylbenzene (o-safrole) (1 d) free of isomers by reaction of 2.3-dihydroxy-allylbenzene (1 b) with CH2BrCl is described.Treating 4-hydroxy-3-methoxy-allylbenzene (3 a) with potassium nitrosodisulfonate gives 3-methoxy-5-allyl-o-benzoquinone (4) which ist reduced to 3-methoxy-5-allyl-pyrocatechol (5) with sodium dithionite. Methylenation of3 c gives myristicin with good yield.


23. Mitt.:F. Dallacker, W. Edelmann undA. Weiner, Ann. Chem.,719, 112 (1968).  相似文献   

10.
利用3-甲硫基-4-乙氧羰基-5-氨基-1H-吡唑分别与甲基/芳基烯胺酮反应, 合成了8种新的化合物2-甲硫基-7-取代-3-吡唑并[1,5-a]嘧啶甲酸乙酯(3a3g)和2-甲硫基-5-甲基-3-吡唑并[1,5-a]嘧啶甲酸乙酯(4a). 化合物的结构均经元素分析, IR, 1H NMR, MS所证实, 异构体3a4a的结构进一步由13C NMR, HMQC和HMBC确认. 同时, 探讨了区域选择性合成吡唑并[1,5-a]嘧啶类化合物可能的反应机理, 并对部分化合物杀菌活性进行了测试.  相似文献   

11.
Four ruthenium(II) p-cymene complexes with naphthalene-based Schiff base ligands [Ru(p-cymene)LCl] (2a2d) have been synthesized and characterized. The half-sandwich ruthenium complexes were characterized by 1H and 13C NMR spectra, elemental analyses, and infrared spectrometry. The molecular structures of 2a, 2b, and 2c were confirmed by single-crystal X-ray diffraction. Furthermore, these half-sandwich ruthenium complexes are highly active catalysts for the hydrogenation of nitroarenes to anilines using NaBH4 as the reducing agent in ethanol at room temperature.  相似文献   

12.
By reaction of excess benzaldehyde with cyclohexene in presence of sulfuric acid besider-2,c-4-diphenyl-(t-4aH,c-8aH)-hexahydro-4H-1,3-benzodioxin (2) andr-4-phenyl-(t-4aH,c-8aH)-hexahydro-4H-1,3,2-benzodioxathiin-2,2-dioxide (3),trans-2-benzyloxycyclohexyl phenyl ketone (5) and (E)-3-benzylidene-1-cyclohexenyl phenyl ketone (6) are obtained. The formation of5 and6 is shown to proceed via an acid catalyzedCannizzaro reaction of benzaldehyde.

2. Mitt.:H. Griengl undK. P. Geppert, Mh. Chem.107, 675 (1976).  相似文献   

13.
Preparation and physical and chemical properties of 3-ethinyl-2,4-diformyl-pentandial (3 a) and its salts are described.3 a contains 2 malonaldehyde groups. Starting from3 a, 4H-pyranes, 4H-dihydropyridines, dipyrazoles, diisoxazoles, bisdiazepines and vinamidine derivates are obtained.

Mit 1 Abbildung  相似文献   

14.
Zusammenfassung Folgende Koordinationsformen entstehen aus [Co(HMPT)4]2+ bei Zusatz von Halogenidionen in Hexamethylphosphorsäuretriamid (HMPT): [Co(HMPT)3Cl]+, [Co(HMPT)2Cl2], [Co(HMPT)Cl3], [CoCl4]2–, [Co(HMPT)3Br]+, [Co(HMPT)2Br2] und [Co(HMPT)3J]+.
Hexamethylphosphoric triamide as a ligand II: Reactions of Co(HMPT)4 2+ with chloride, bromide, and iodide ions
The following coordination species are formed from [Co(HMPT)4]2+, by addition of halide ions in hexamethylphosphoric triamide (HMPT): [Co(HMPT)3Cl]+, [Co(HMPT)2Cl2], [Co(HMPT)Cl3], [CoCl4]2–, [Co(HMPT)3Br]+, [Co(HMPT)2Br2] and [Co(HMPT)3J]+.


Mit 7 Abbildungen

V. Gutmann, A. Weisz undW. Kerber, 1. Mitt., Mh. Chem.100, 2096 (1969).  相似文献   

15.
Zusammenfassung 14-Brom-codeinon-dimethylacetal (1), das mit LiAlH4 und NaBH4 nicht reagiert, liefert bei der Einwirkung von Natrium-bis-(2-methoxy-äthoxy)-aluminiumhydrid in Benzol Thebain (2) in guter Ausbeute. Zu dem gleichen Ergebnis führt die Umsetzung Chrom(II)-Salzen inDMF.
Thebaine, the product of the debromination of 14-bromocodeinone dimethyl acetal
The reaction of 14-Bromo-codeinone dimethyl acetal (1) with sodium-bis-(2-methoxyethoxy)-aluminium hydride in benzene leads to thebaine (2) in high yield. The same result is reached by the use of chromous sulfate in aqueousDMF. On the other hand1 is uneffected by LiAlH4 and NaBH4.
  相似文献   

16.
Zusammenfassung Die Darstellung von polymeren Indigofarbstoffen (PI) nach dem Verfahren vonZiegler undKappe 2, 3 wird beschrieben. Ausgehend von Benzidin (1 a) und Tolidin (1 b) erhält man so diePI 6 a bzw.6 b. In analoger Weise wird aus Tetrahydrochinoxalin (7), der N,N-überbrücktePI 12 gewonnen.
Syntheses of heterocycles, CXLVI: The synthesis of polymeric indigos with potential semiconductor properties
The synthesis of polymeric indigos (PI) according to the procedure ofZiegler andKappe 2, 3 is described. Starting with benzidine (1 a) or tolidine (1 b) thePI 6 a and6 b, resp., are obtained. In a similar way the N,N-bridgedPI 12 is synthesized from tetrahydroquinoxaline (7).


Aus den Dissertationen vonH. G. Foraita undL. F. Werner, Universität Graz, Januar bzw. Juni 1963.  相似文献   

17.
Catalytic hydrogenation of [2.2]metacyclophane yieldscis-cis-anti-cis-cis-hexadecahydropyrene (4) by a transanular cyclization between positions 8 and 16.4 can be isomerized to givetrans-trans-anti-trans-trans-hexadecahydropyrene (1), so far the only known configurational isomer of that tetracyclane series. The configuration of4 was established by means of13C-N M R- and1H-N M R-spectroscopy as well as by1H-N M R-studies of selectively deuterated4 (4-d10), accessible by catalytic deuteration of [2.2]metacyclophane.

Mit 5 Abbildungen

Herrn Prof. Dr.F. Hecht zum 70. Geburtstag gewidmet.  相似文献   

18.
Starting from optically active methylferrocene-- and--carboxylic acids (1 a and1 b) of known absolute configuration and enantiomeric purity about 15 chiral ferrocenes (of each isomeric series— and ) were obtained by suitable ligand transformations. Thereby (almost) all possible chiral combinations of the ligands CH3, COOH (COO), COOCH3, CN and NH2 (NH3 +) were accessible which are necessary for a potential test of approximations of chirality functions for compounds with basic symmetry C5v. The chiroptical properties of these disubstituted ferrocenes are recorded.Preliminary tests using a shortened Ansatz revealed large discrepancies between calculated () and found [M]D-values. Possible reasons for this failure are discussed.

61. Mitt. über Ferrocenderivate

39. Mitt.:A. Meyer, H. Neudeck undK. Schlögl, Chem. Ber.110, 1403 (1977).

60. Mitt.:V. Rapi, K. Schlögl undB. Steinitz, J. Organometal. Chem.94, 87 (1975).  相似文献   

19.
Crystals of the title compound were prepared by heating Cs[Pr(SO4)2(H2O)3]·H2O with H2SO4 at 300°C. CsPr(SO4)2 crystallizes in the orthorhombic space group Pnna witha=9.497(3),b=14.106(5),c=5.457(1) Å,p 0=4.20,p c=4.236 gcm-3,Z=4. The structure, solved by the heavy-atom method from X-ray diffractometer data, was refined by least-squares techniques to R=0.023. The praseodymium atom is eight coordinated by eight oxygen atoms in the form of a distortedArchimedian antiprism. The antiprisms together with sulphur atoms form a layer-like structure parallel to thexz plane. The caesium atoms, which lie between the layers, have a coordination number of fourteen.

3. Mitt.: Mh. Chem.108, 997 (1977).  相似文献   

20.
Guanidine reacts with 1,3-diphenyl-2-propen-1-one to yield not only the dihydropyrimidine2 a 2 and the aromatic compound3 a 2, but also a bicyclic base, 2,4,6,8-tetraphenyl-2,8-dihydro-1H-pyrimido[1,2–a]pyrimidine (4). Action of 4-phenyl-3-buten-2-one on guanidine generates a 22-condensate, 7-methyl-4,5-diphenyl-4,4a,5,6,7,8,10,10a-octahydro-7,10a-methano-pyrimido[4,5–d]diazocine-2,9(1H, 3H)-diimine12 R besides the methylphenylpyrimidinamine3 b 2. The structural formulae4 and12 are proved by NMR-spectra. The mass spectra and the mechanisms of the formation of4 and12 are also discussed.

Herrn Prof. Dr.O. Hromatka zum 70. Geburtstag gewidmet.  相似文献   

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