Synthesis and reactions of substituted benzofuro[3,2-b]pyrrole derivatives

1982 ◽  
Vol 47 (12) ◽  
pp. 3288-3296 ◽  
Author(s):  
Alžbeta Krutošíková ◽  
Jaroslav Kováč ◽  
Miloslava Dandárová ◽  
Mária Bobálová
Keyword(s):  
Electron Impact ◽  
Mass Spectra ◽  
Pyrrole Derivatives ◽  
H Nmr ◽  
Electron Impact Mass ◽  
Impact Mass ◽  
C Nmr

This paper deals with the preparation of ethyl benzofuro[3,2-b]pyrrole-2-carboxylate, its hydrolysis, N-alkylation, and reduction. Also the synthesis of new heterocyclic systems, benzofuro[3,2-b]pyrrole and 2H-dihydrobenzofuro[2',3':4,5]pyrrolo[1,2-d]-1,2,4-triazin-1-one, is described. The structure of 14 new substances was corroborated by IR, UV, 1H NMR, 13C NMR and electron impact mass spectra.

Mikrobielle Produkte, I NMR-Spektren von Nocardamin und Massenspektrum des Tri-O-methyl-nocardamins / Microbiological Products, I NMR Spectra of Nocardamine and Mass Spectra of Tri-O-methyl-nocardamine

1977 ◽  
Vol 32 (8) ◽  
pp. 937-942 ◽  
Author(s):  
Hubert Maehr ◽  
Wolfgang Benz ◽  
Joanne Smallheer ◽  
Thomas H. Williams
Keyword(s):  
Mass Spectra ◽  
Nmr Spectra ◽  
Silver Oxide ◽  
Electron Impact Mass Spectrometry ◽  
Streptomyces Species ◽  
H Nmr ◽  
Fragmentation Mechanisms ◽  
Electron Impact Mass ◽  
Impact Mass ◽  
C Nmr

Nocardamine was isolated from an unidentified Streptomyces, species X-14568, and its 1H NMR and 13C NMR spectra are assigned in detail. Reaction with iodomethane and silver oxide converts nocardamine to the tri-O-methyl ether which is a suitable derivative for electron-impact mass spectrometry. Fragmentation mechanisms of tri-O-methylnocardamine are discussed.

Notizen: Fast Pulsed Laser Induced Electron Generation for Electron Impact Mass Spectrometry

1988 ◽  
Vol 43 (12) ◽  
pp. 1151-1153 ◽  
Author(s):  
E. R. Rohwer ◽  
R.C. Beavis ◽  
C. Köster ◽  
J. Lindner ◽  
J. Grotemeyer ◽  
...  
Keyword(s):  
Electron Impact ◽  
Mass Spectra ◽  
Ion Source ◽  
Electron Impact Mass Spectrometry ◽  
Uv Laser ◽  
Electron Generation ◽  
Medium Resolution ◽  
Electron Impact Mass ◽  
Impact Mass ◽  
Tof Ms

A new ultra fast electron impact (El) ion source is pre­sented that produces a very short, high intensity electron beam, allowing medium resolution mass spectra to be re­corded without pulsing the ion accelerating voltages in a time-of-flight mass spectrometer (TOF-MS). The ion source requires minimum modification of any TOF-MS equipped with an electrostatic ion reflector and UV-laser. El-spectra are presented for comparison with literature spectra.

ChemInform Abstract: MASS SPECTRA OF NITRONES. ELECTRON IMPACT MASS SPECTRA OF FLUORENONE NITRONES

1981 ◽  
Vol 12 (29) ◽  
Author(s):  
M. A. ABOU-GHARBIA ◽  
D. T. TERWILLIGER ◽  
M. M. JOULLIE ◽  
R. M. SRIVASTAVA
Keyword(s):  
Electron Impact ◽  
Mass Spectra ◽  
Electron Impact Mass ◽  
Impact Mass

Electron impact mass spectra of δ-keto enol esters

1996 ◽  
Vol 2 (1) ◽  
pp. 129
Author(s):  
Teodor Balaban ◽  
Dietrich Müller
Keyword(s):  
Electron Impact ◽  
Mass Spectra ◽  
Enol Esters ◽  
Electron Impact Mass ◽  
Impact Mass

Electron impact mass spectra of enamine esters, ketones and nitriles

1992 ◽  
Vol 27 (2) ◽  
pp. 123-125
Author(s):  
N. R. Ayyangar ◽  
R. J. Lahoti ◽  
Thomas Daniel ◽  
A. Sudalai
Keyword(s):  
Electron Impact ◽  
Mass Spectra ◽  
Electron Impact Mass ◽  
Impact Mass

Electron impact mass spectra of permethylated disaccharide alditols

1994 ◽  
Vol 254 ◽  
pp. 15-23 ◽  
Author(s):  
Bengt Lindberg ◽  
Frank Lindh ◽  
Jörgen Lundsten ◽  
Sigfrid Svensson
Keyword(s):  
Electron Impact ◽  
Mass Spectra ◽  
Electron Impact Mass ◽  
Impact Mass
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