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Titolo:
THERMAL-DECOMPOSITION OF STRAINED SPIRO(1-PYRAZOLINE-3,L'-CYCLOPROPANES)
Autore:
TOMILOV YV; SHULISHOV EV; YARYGIN SA; NEFEDOV OM;
Indirizzi:
ND ZELINSKII INST ORGAN CHEM,47 LENINSKY PROSPECT MOSCOW 117913 RUSSIA
Titolo Testata:
Russian chemical bulletin
fascicolo: 11, volume: 44, anno: 1995,
pagine: 2109 - 2113
SICI:
1066-5285(1995)44:11<2109:TOSS>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
PHOTOCHEMICAL DECOMPOSITION;
Keywords:
SPIRO(1-PYRAZOLINE-3,1'-CYCLOPROPANES); METHYLENECYCLOPROPANES AND SPIROPENTANES; PYROLYSIS; ISOMERIZATION; NMR SPECTRA;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
18
Recensione:
Indirizzi per estratti:
Citazione:
Y.V. Tomilov et al., "THERMAL-DECOMPOSITION OF STRAINED SPIRO(1-PYRAZOLINE-3,L'-CYCLOPROPANES)", Russian chemical bulletin, 44(11), 1995, pp. 2109-2113

Abstract

Pyrolysis (320-370 degrees C) of polycyclic 1-pyrazolines 1 and 2, obtained by 1,3-dipolar cycloaddition of diazocyclopropane to 3,3-dimethylcyclopropene and spiro[2,3]hex-1-ene, yields complex mixtures of isomeric hydrocarbons, substituted methylenecyclopropanes being the main components. Pyrolysis of 6-ethenyl- (4) and xy-6-methylcarbonyl-4,5-diazaspiro[2,4]hept-4-enes (6) at 310-320 degrees C proceeds more unambiguously to give vinyl- (18) and 1-methoxy-1-methylcarbonylspiropentanes (20) in similar to 85 and 95 % yields with respect to the transformed pyrazolines. Dediazotization of pyrazoline 3 obtained from diazocyclopropane and benzvalene requires more drastic conditions (similar to 440 degrees C) and produces indane.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/09/20 alle ore 06:41:02