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  • Articles  (26)
  • Organic Chemistry  (24)
  • kairomone  (2)
  • General Chemistry
  • 1980-1984  (10)
  • 1975-1979  (16)
  • 1
    Electronic Resource
    Electronic Resource
    Kairomones and their use for management of entomophagous insects (1981)
    Springer
    Journal of chemical ecology 7 (1981), S. 909-917 
    Details
    ISSN: 1573-1561
    Keywords: Trichogramma pretiosum ; Hymenoptera ; Trichogrammatidae ; biological control ; kairomone ; Heliothis zea ; Lepidoptera ; Noctuidae ; host density
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Trichogramma pretiosum Riley females exhibit success-motivated searching after oviposition. The stimulatory effect of contact with host eggs makes host-egg density an important factor in determining the appropriate strategy for behavioral manipulation, using kairomones, that simulate host seeking, in biological control programs. Host eggs can be used, in conjunction with kairomones or by themselves, to improve the performance of these important beneficial insects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00987616
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  • 2
    Electronic Resource
    Electronic Resource
    Kairomones and their use for management of entomophagous insects (1979)
    Springer
    Journal of chemical ecology 5 (1979), S. 673-680 
    Details
    ISSN: 1573-1561
    Keywords: Trichogramma ; Hymenoptera ; Trichogrammatidae ; kairomone ; Heliothis zea ; biological control ; pest management ; parasitoids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract A kairomone from adultHeliothis zea (Boddie) scales is an important factor in the host selection process ofTrichogrammapretiosum Riley. If the host density is sufficiently high (i.e., 1 egg/500 cm2) and higher), a complete coverage or solid treatment of kairomone spray may be the optimum for increasing parasitization rates, but this is not the case at lower host densities (e.g., 1 egg/2000 cm2). At the lower densities, the kairomone must be distributed in such a way as to retain the parasitoids in the target area without inhibiting their movement from one ovi-position site to the next. Simulated moth scale particles appear to fill this need since their density can be regulated to provide the optimum frequency of parasitoid stimulation and thus maximum rates of parasitization at prevailing host densities.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00986552
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  • 3
    Electronic Resource
    Electronic Resource
    α-Substituierte Phosphonate. 39. Methandiphosphonsäureester durch UV-induzierte Michaelis-Becker-ReaktionHerrn Prof. Dr. Dr. h. c. mult. Alfred Rieche zum 80. Geburtstag gewidmet (1982)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 324 (1982), S. 537-544 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: α-Substituted Phosphonates. 39. Methane-diphosphonic Esters by U.V.-Induced Michaelis-Becker-ReactionDibromomethane resp. chlorbromomethane reacts with sodium dialkyl phosphite in heptane-/liq.NH3 or in liq. NH3 by u.v. irradiation at low temperatures to give in good yields methane diphosphonic acid tetraalkylesters 1. In the same manner with sodium diethyl thionophosphite the corresponding methane-bis-thiophosphonic acid tetraethylester 4 is obtained.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19823240406
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  • 4
    Electronic Resource
    Electronic Resource
    α-Substituierte Phosphonate. 40. 1-Trimethylammonium-1-diethylphosphono-1-cyanomethylid, ein stabiles N-YlidHerrn Prof. Dr. Dr. h. c. mult. Alfred Rieche zum 80. Geburtstag gewidmet (1982)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 324 (1982), S. 545-549 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: α-Substituted Phosphonates. 40. 1-Trimethylammonium-1-diethylphosphono-1-cyanomethylid, a Stable N-YlidDiethyl-1-dimethylamino-1-cyanomethanephosphonate 4 can be alkylated on nitrogen to the quarternary ammoniumsalts 5, which by C-deprotonation gives the stable N-ylid 8. The N-ylid 8 behaves inert against carbonyl compounds and acylating agents, but can be C-alkylated and  -  involving an ester-dealkylation  -  C-chlorinated.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19823240407
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  • 5
    Electronic Resource
    Electronic Resource
    α-Substituierte Phosphonate. XXXI. Zur Reaktion von N,N,N′,N′-Tetramethylchlorformamidiniumchlorid mit P-III-Verbindungen (1978)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 320 (1978), S. 389-394 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: α-Substituted Phosphonates. XXXI. The Reaction of N,N,N′,N′-Tetramethyl Chloroformamidinium Chloride with P(III) CompoundsN,N,N′,N′-Tetramethyl chloroformamidiniumchloride (4) does not react with triethyl phosphite (TEP) or isopropyl diphenylphosphinate to give the expected bisphosphoryl derivatives 7 and 11, respectively, but primarily the monophosphorylated amidinium salts 6 and 10 respectively. The phosphine oxide 10 is stable, while 6 undergoes an elimination of ethyl chloride to the betain 8. Even under more drastic conditions the reaction of 4 or 8 with TEP does not lead to the expected bis(dimethylamino)bisphosphonate 7, but to the monoaminated bisphosphonate 1, involving a reduction step. Similar reduction has been observed under mild conditions in Michaelis-Arbusov reaction of dichloromethylenimonium chloride, yielding the expected trisphosphonate 2 and the bisphosphonate 1 as a by-product.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19783200305
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  • 6
    Electronic Resource
    Electronic Resource
    α-Substituierte Phosphonate. 43. Synthese und Reaktivität von 1,2,3,4-Tetrahydroisochinolin-1-phosphonaten (1983)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 325 (1983), S. 437-445 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: α-Substituted Phosphonates. 43. Synthesis and Reactivity of 1,2,3,4-Tetrahydroisochinolin-1-phosphonatesN-Alkyl- and N-arylsubstituted 1,2,3,4-tetrahydroisochinolin-1-phosphonates 1 have been synthesized from the corresponding 3,4-dihydroisochinoliniumbromides 7 and triethyl-phosphite. The N-unsubstituted 1,2,3,4-tetrahydroisochinolin-1-phosphonate 10 is available starting from the 1,2,3,4-tetrahydroisochinolin-1-phosphonic acid by esterification with triethylformate and splitting off the formyl group of the primarily formed N-formyl derivative 14. - N-Quarternated tetrahydroisochinolines 19 and the 1-phosphorylated derivatives 17, respectively react with triethyl-phosphite in an unexpected way by dealkylation and not by splitting off the isochinolinring. - By Horner-synthesis with 1 the 1-aralkylidene-isochinolines 23 are available in moderate yields.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19833250313
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  • 7
    Electronic Resource
    Electronic Resource
    Synthese und Reaktionsverhalten von 2-Aryloxy-s-trithianen (1981)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 323 (1981), S. 939-950 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Synthesis and Reactions of 2-Aryloxy-s-trithianes2-Aryloxy-s-trithianes 4 had been prepared from 1-tosyl-imino-1-SIV-1,3,5-trithiane and phenolates. - By self-condensation of 4 1,5-bis-(trithianyl)-1,3,5-trithiapentane 5 and triphenyl-orthoformate 7 are formed, accompanied by further products, which had been isolated in pure state and identified unambiguously by H-n.m.r. and mass-spectra. In the presence of acids the 2-aryloxy-s-trithianes 4 react with nucleophilic aromatic compounds such as phenoles, N,N-dimethylaniline, pyrrole, indole, and thiophenes to give the C-trithianylated products. With mercaptanes 2-alkylthio-s-trithianes are formed.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19813230612
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  • 8
    Electronic Resource
    Electronic Resource
    Notiz zur Synthese unsymmetrisch substituierter Derivate der Diäthoxymethanphosphonsäure [1]Herrn Prof. Dr. Dr. h. c. mult. Alfred Rieche zum 75. Geburtstag gewidmet (1977)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 319 (1977), S. 343-346 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19773190223
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  • 9
    Electronic Resource
    Electronic Resource
    O, O- und S, S-Acetale von Formylphosphoniumsalzen (1978)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 320 (1978), S. 128-132 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: O,O- and S,S-Acetals of FormylphosphoniumsaltsFor the synthesis of O,O- resp. S,S-acetals (4) of formylphosphoniumsalts, which are not known as free formylderivatives, is described a simple method, consisting in reaction of tert. phosphin with orthoester and acetyl-halide. O,O-Diarylacetals of the type 4 can be synthesized from tert. phosphine and diaryloxychlormethane.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19783200116
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  • 10
    Electronic Resource
    Electronic Resource
    Reaktion von Epoxiden mit Phosphonsäuremonoestern und Phosphonsäuren (1975)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 317 (1975), S. 798-806 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Phosphonsäuremonoalkylester bzw. Phosphonsäuren reagieren mit Epoxiden zu Phosphonsäure-alkyl-β-hydroxyalkyl- 5 bzw. -bis-β-hydroxyalkylestern 9 oder zu höhermolekularen Polyglykolestern. Durch intramolekulare Umesterung entstehen aus 5 bzw. 9 beim Destillieren unter Abspaltung von Alkohol bzw. Glykol cyclische Phosphonsäureester 6 bzw. 11.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19753170513
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