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  • 1,2-Dihydro-1,3,2λ5,4λ5-diazadiphosphete  (1)
  • Alkylation  (1)
  • Bicyclo[3.2.1]octanes, stereoselective syntheses of  (1)
Materialart
Erscheinungszeitraum
Schlagwörter
  • 1
    ISSN: 1434-4475
    Schlagwort(e): 9(10H)-Acridinone ; Alkylation ; Phase-transfercatalysis ; Prototropic rearrangement ; X-Ray
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Summary Reaction of 9(10H)-acridinone (2) with 3-chloro-3-phenyl-1-propyne under PTC conditions affords 1-methyl-2-phenyl-6H-pyrrolo[3,2,1-de]acridin-6-one (1 b), 10-(2-chloro-1-methyl-2-phenyl-ethenyl)-9(10H)-acridinone (4), 10-(3-phenyl-1-propynyl)-9(10H)-acridinone (7), and 10-(4-methylene-2,3-diphenyl-2-cyclobuteneylidenemethyl)-9(10H)-acridinone (5). The structure of the last compound which crystallizes in the triclinic system with the space group $$P\bar 1$$ , was confirmed by X-ray diffraction. Under the same conditions 10-(3-phenyl-2-propynyl)-9(10H)-acridinone (3) and 10-(3-phenyl-1-propynyl)-9(10H)-acridinone (6) were obtained from 9(10H)-acridinone (2) and 3-bromo-1-phenyl-1-propyne.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    ISSN: 0009-2940
    Schlagwort(e): Ring enlargement ; Phellandrene ; Carbonylation ; Bicyclo[3.2.1]octanes, stereoselective syntheses of ; Iron complexes ; Chemistry ; Inorganic Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Carbonylating Ring Enlargement, 41). - Diastereoselective Syntheses of Bicyclo[3.2.l]oct-3-ene-2,8-diones by Double Carbonylation of (It)-(-)-α-PhellandreneIn order to clarify the stereochemistry of the carbonylating ring enlargement of cyclohexadiene complexes 1 to complexed seven-membered ring ketones 2 and the further carbonylation to bicyclo[3.2.1]oct-3-ene-2,8-diones 3 the exo and endo isomers of (R)-(-)-α-phellandrene complex 7 were synthesized in pure form and in various isomeric ratios and converted. The optically active ring-enlargement products 11 and 12 obtained therefrom, as well as the enantiomerically pure bicyclooctenes 20-22, implicate a stereospecific reaction course under retention of the configuration predetermined by the starting material 6 and its complexes 7. This was confirmed by an X-ray determination of the absolute configuration of exo-12. Thus, the method is suitable for the diastereoselective synthesis of bicyclo[3.2.1]oct-3-ene-2,8-diones 3 from 1,3-cyclohexadiene complexes 1.
    Zusätzliches Material: 1 Ill.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    ISSN: 0009-2940
    Schlagwort(e): 1,2-Dihydro-1,3,2λ5,4λ5-diazadiphosphete ; Isomerization ; Chemistry ; Inorganic Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: 1,2-Dihydro-1,3,2λ5,4λ5-diazadiphosphete - Synthesis, Structure and Isomerization to the „Inner Salt“ of 1,3,2,4λ5-Diazadiphosphetan-2-ium HydroxideThe photochemical reaction of the azidophosphane (iPr2N)2PN3 (1) with the tetraazaphospholene (3) and the bis(imino)phosphorane (Me3Si)2NP(=NSiMe3)2 (6) proceeds by elimination of N2 to yield (5) and by 1,3-silyl group shift to furnish (8) the structures of which were determined by means of NMR data and, in the case of 5, additionally by X-ray structure analysis.
    Zusätzliches Material: 1 Ill.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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