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  • 1
    Electronic Resource
    Electronic Resource
    Localization and organization of phenol degradation genes ofPseudomonas putida strain H (1995)
    Springer
    Molecular genetics and genomics 247 (1995), S. 240-246 
    Details
    ISSN: 1617-4623
    Keywords: Pseudomonas putida ; Phenol degradation ; Insertion mutagenesis ; Gene organization ; DNA sequence
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The genetic organization of the DNA region encoding the phenol degradation pathway ofPseudomonas putida H has been investigated. This strain can utilize phenol or some of its methylated derivatives as its sole source of carbon and energy. The first step in this process is the conversion of phenol into catechol. Catechol is then further metabolized via themeta-cleavage pathway into TCA cycle intermediates. Genes encoding these enzymes are clustered on the plasmid pPGH1. A region of contiguous DNA spanning about 16 kb contains all of the genetic information necessary for inducible phenol degradation. The analysis of mutants generated by insertion of transposons and cassettes indicates that all of the catabolic genes are contained in a single operon. This codes for a multicomponent phenol hydroxylase andmeta-cleavage pathway enzymes. Catabolic genes are subject to positive control by the gene product(s) of a second locus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00705655
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  • 2
    Electronic Resource
    Electronic Resource
    Reversible Rearrangements of Chlorophosphane-Dichlorogermylene Ylides to Trichlorogermylphosphanes  -  Structure Determination of a Tetranuclear Bis(chlorophosphane)bis(trichlorogermylphosphane) Silver Bromide Complex (1997)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 130 (1997), S. 1619-1623 
    Details
    ISSN: 0009-2940
    Keywords: Dichlorogermylene ; Trichlorogermylphosphanes ; Insertion ; Silver bromide complex ; Carbene homologues ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Chlorophosphanes RR'PCl (1a: R,R' = 1b: R = tBu, R' = iPr, 1c: R = iPr, R' = Et2N, 1d: R = Et2N react with the dichlorogermylene dioxane complex 2 furnishing trichlorogermylphosphanes RR'PGeCl3 4a-d. In the cases of 1c/4c and 1d/4d the insertion reaction remain incomplete; similarly, 4a always contains, shortly after isolation in pure state, small amounts of 1a that can be detected by NMR. A provided by the reaction of trichlorosilylphosphane tBu(Et2N)PSiCl3 (5d) with GeCl4. The alkyl(dialkylamino) trichlorogermylphosphane 4d exists only in an equilibrium with chlorophosphane 1d, which coordinates GeCl2 leading to the dichlorogermylene complex 3d. A 1:1 mixture of 4a with 1a is formed by the novel cleavage (“chlorogermylation”) of the P-P bond of tetraisopropyldiphosphane with germanium tetrachloride. Di-tert-butyl(trichlorogermyl)phosphane 4e (R, R' = tBu) reacts with silver bromide providing a crystalline silver complex 7. A structure determination by X-ray diffraction reveals that 7 is [Ag4Br4(tBu2PCl)2(tBu2PGeCl3)2]. 2C7H8. Two of the Ag atoms of the cubane-like (AgBr)4 core of 7 are coordinated by chlorophosphane 1e, the other two by trichlorogermylphosphane 4e.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19971301110
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  • 3
    Electronic Resource
    Electronic Resource
    1,2,4-Benzothia(IV)diazine und 1,2,5-Benzothia(IV)diazepine, 2. Darstellung und Ringerweiterung einiger 3-(Chlormethyl)-3,4-dihydro-1,2,4-benzothia(IV)diazin-1-oxide (1973)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 106 (1973), S. 3368-3375 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 1,2,4-Benzothia(IV)diazines and 1,2,5-Benzothia(IV)diazepines, 2. Preparation and Ring Enlargement of some 3-(Chloromethyl)-3,4-dihydro-1,2,4-benzothia(IV)-diazine 1-OxidesSulfoximides 2 react with aldehydes or ketones to give 3,4-dihydro-1,2,4-benzothia(IV)diazines 3. With aldehydes the reaction is shown to afford stereoselectively only one of the two diastereoisomeres. Treatment of 3a, g, and h with alcoholate proceeds under ring enlargement to the novel 4,5-dihydro-3H-1,2,5-benzothia(IV)diazepines 5 and 6, respectively. 3i undergoes an intramolecular rearrangement to 7.
    Notes: Sulfoximide vom Typ 2 reagieren mit Aldehyden oder Ketonen zu 3,4-Dihydro-1,2,4-benzothia(IV)diazinen 3. Mit Aldehyden verläuft die Reaktion stereoselektiv unter Bildung nur eines der beiden möglichen Diastereomeren. Unter der Einwirkung von Alkoholat erfahren 3a, g und h eine Ringerweiterung zu 4,5-Dihydro-3H-1,2,5-benzothia(IV)diazepinen 5 bzw. 6. 3i unterliegt einer intramolekularen Umwandlung zu 7.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19731061020
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  • 4
    Electronic Resource
    Electronic Resource
    1.2.4-Benzothia(IV)diazine und 1.2.5-Benzothia(IV)diazepine, Ringerweiterung einiger Chlormethyl-1.2.4-benzothia(IV)diazin-1-oxide (1972)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 105 (1972), S. 757-769 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 1.2.4-Benzothia(IV)diazines and 1.2.5-Benzothia(IV)diazepines, Ring Enlargement of Some Chloromethyl-1.2.4-benzothia(IV)diazine 1-oxidesDiarylsulfoxides 4 react with hydrazoic acid in the presence of sulfuric acid to form 1.2.4-benzothia(IV)diazine 1-oxides 7. On treatment of 3-chloromethyl-1-aryl-1.2.4-benzothia(IV)-diazine 1-oxides 7a-d with sodium hydroxide a novel rearrangement occurs affording 1-aryl-4-oxo-4.5-dihydro-3H-1.2.5-benzothia(IV)diazepine 1-oxides 9. Reaction of 7a-d with primary amines in alcoholic solution proceeds without rearrangement.
    Notes: Diarylsulfoxide 4 reagieren mit Stickstoffwasserstoffsäure in Gegenwart von Schwefelsäure zu 1.2.4-Benzothia(IV)diazin-1-oxiden 7. 3-Chlormethyl-1-aryl-1.2.4-benzothia(IV)diazin-1-oxide 7a-d erfahren unter dem Einfluß von Hydroxidionen eine Ringerweiterung zu 1-Aryl-4-oxo-4.5-dihydro-3H-1.2.5-benzothia(IV)diazepin-1-oxiden 9, einem neuen heterocyclischen Ringsystem. Reaktion von 7a-d mit primären Aminen in alkoholischer Lösung führt zu normaler Substitution.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19721050305
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