scholarly journals Mass spectra of dodecadienic compounds with a conjugated double bond, lepidopterous sex pheromones.

1985 ◽  
Vol 49 (2) ◽  
pp. 413-421 ◽  
Author(s):  
Tetsu ANDO ◽  
Yoshio KATAGIRI ◽  
Masaaki UCHIYAMA
Keyword(s):  
Double Bond ◽  
Mass Spectra ◽  
Sex Pheromones

scholarly journals Systematic Syntheses and Characterization of Dodecadien-1-olswith Conjugated Double Bond, Lepidopterous Sex Pheromones

1985 ◽  
Vol 49 (1) ◽  
pp. 141-148 ◽  
Author(s):  
Tetsu Ando ◽  
Yuichi Kurotsu ◽  
Mieko Kaiya ◽  
Masaaki Uchiyama
Keyword(s):  
Double Bond ◽  
Sex Pheromones

Zur Cycloaddition von Azidoameisensäuremethylester an die Metall-Carben-Doppelbindung in η2-Thiocarbenkomplexen des Molybdäns und Wolframs / Cycloaddition of Azidoformic Acid Methylester to the Metal Carbon Double Bond of η2-Thiocarbene Complexes of Molybdenum and Tungsten

1993 ◽  
Vol 48 (11) ◽  
pp. 1481-1487
Author(s):  
Fritz R. Kreißl ◽  
Wolfgang Schutt ◽  
Josef Ostermeier ◽  
Claudia M. Stegmair ◽  
Waltraud Ullrich ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Double Bond ◽  
Mass Spectra ◽  
Space Group ◽  
Carbon Double Bond ◽  
Bicyclic System ◽  
And Tungsten

Cationic η2-thiocarbene complexes of molybdenum and tungsten [Cp(CO)PMe3[BF4] (R = Me, Ph, Tol) add N3COOMe to the electron rich metal carbon double bond to yield the corresponding bicyclic system. The products have been characterized by 1H, 13C, 31P NMR, IR and mass spectra. The crystal structure of 4b has been determined: space group P21/n with a = 1749.9(7), b = 827.9(1), c = 1846.8(7) pm and Z = 4.

scholarly journals Feldionen-Massenspektren organischer Moleküle IV. Olefine

1965 ◽  
Vol 20 (10) ◽  
pp. 1335-1344
Author(s):  
H. D. Beckey ◽  
P. Schulze
Keyword(s):  
Double Bond ◽  
Mass Spectra ◽  
Stable Configuration ◽  
Allyl Radical ◽  
Field Dissociation

The field ion mass spectra of the olefins are discussed. It is shown that the double bond and the bond next to it are very stable against field dissociation. The fragment patterns of all olefins show some features due to the stable configuration of the allyl radical or the allyl ion respectively. This is verified by some energetic calculations, by which the spectra of some olefins are explained, too. The stabilities of paraffins and olefins against field dissociation are compared.

scholarly journals Mass spectra of lepidopterous sex pheromones with a conjugated diene system.

1988 ◽  
Vol 52 (6) ◽  
pp. 1415-1423 ◽  
Author(s):  
Tetsu ANDO ◽  
Yasushi OGURA ◽  
Masaaki UCHIYAMA
Keyword(s):  
Mass Spectra ◽  
Sex Pheromones ◽  
Conjugated Diene ◽  
Diene System

scholarly journals Systematic syntheses and characterization of dodecadien-1-ols with conjugated double bond, lepidopterous sex pheromones.

1985 ◽  
Vol 49 (1) ◽  
pp. 141-148 ◽  
Author(s):  
Tetsu ANDO ◽  
Yuichi KUROTSU ◽  
Mieko KAIYA ◽  
Masaaki UCHIYAMA
Keyword(s):  
Double Bond ◽  
Sex Pheromones

Anhydrobetulin and its derivatives

1991 ◽  
Vol 56 (4) ◽  
pp. 886-904 ◽  
Author(s):  
Alois Vystrčil ◽  
Václav Křeček ◽  
Jiří Protiva ◽  
Miloš Buděšínský
Keyword(s):  
Double Bond ◽  
Alkaline Medium ◽  
Sodium Borohydride ◽  
Mass Spectra ◽  
Nmr Spectra ◽  
Cotton Effect ◽  
Addition Reactions ◽  
Chemical Transformations ◽  
C Nmr ◽  
Reduction Of Ketones

The structure of anhydrobetulin II and its derivatives I, III and IV has been solved using 1H and 13C NMR spectra, mass spectra and chemical transformations. It has been proven that in addition reactions the trisubstituted double bond is attacked selectively from the α-side under formation of D/E cis-annelated derivatives VIII, X and XI. The 22-oxo derivative XIII exhibits an anomalous Cotton effect and, in contrast to its saturated analogue XXVII,it is not epimerized in alkaline medium. Trinordiketone XXI easily epimerizes to a mixture in which the 17βH-epimer XXIb predominates, trinorketone XXIV is stable only if the annelation of rings D and E is trans. These differences are explained in terms of steric interactions of substituents in position 19. The steric course of reduction of ketones XIII and XXIV with sodium borohydride is described.

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