Results 111 to 120 of about 79,082 (160)

Equilibration of 2H-azirine with vinylnitrene

Journal of the Chemical Society, Chemical Communications, 1972
Treatment of 2,3-diaryl-2H-azirine-2-carboxamide with triphenylphosphine and carbon tetrachloride affords the triphenyliminophosphorane (4).
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Photocycloaddition reactions of a bis-2H-azirine

Journal of the Chemical Society, Chemical Communications, 1977
Irradiation of 3,3′-(2,2′-biphenylene)bis-(2H)-azirine with electron-deficient dipolarophiles gives cycloadducts derived from a transient azabicyclo[3.1.0]hexene intermediate.
Albert Padwa, Hao Ku
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Organocatalyzed nucleophilic addition of pyrazoles to 2H-azirines: asymmetric synthesis of 3,3-disubstituted aziridines and kinetic resolution of racemic 2H-azirines

Chemical Communications, 2016
An asymmetric nucleophilic addition of pyrazoles to 2 H -azirines via organocatalytic kinetic resolution afforded chiral aziridines and azirines simultaneously.
Dong, An, Xukai, Guan, Rui, Guan, Lajiao, Jin, Guangliang, Zhang, Suoqin, Zhang   +5 more
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Formation of 2H-azirines by the pyrolysis of 1,2,3-triazoles

Journal of the Chemical Society D: Chemical Communications, 1971
1-Phthalimido-1,2,3-triazoles (1) thermally fragment in the vapour phase; the products isolated are 2H-azirines (2) and compounds derived from these azirines by further fragmentation or rearrangement.
D. J. Anderson, T. L. Gilchrist, G. E. Gymer, C. W. Rees   +3 more
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ChemInform Abstract: ALKYLATION AND SILYLATION OF 2H‐AZIRINES

Chemischer Informationsdienst, 1985
AbstractDas Azirin (I) wird zu (II) lithiiert, das mit elektrophilen Reagentien in der Seitenkette zu (III) substituiert wird.
P. F. BELLOIR, A. LAURENT, P. MISON, R. BARTNIK, S. LESNIAK   +4 more
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Exploiting 2-Halo-2H-Azirine Chemistry

Current Organic Synthesis, 2004
H-Azirines are the smallest unsaturated heterocyclic compounds containing nitrogen. Despite their strain many stable azirines are known. Due to the high reactivity 2H-azirines have been explored extensively for various synthetic purposes. The ring system occurs naturally in the antibiotics azirinomycin, isolated from Streptomyces auras cultures ...
Teresa Pinho e Melo, Antonio Gonsalves
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Microwave spectrum of 3-methyl-2H-azirine

Journal of Molecular Structure, 1997
Abstract The microwave spectrum of 3-methyl-2H-azirine produced by pyrolyzing N -chloro-2-methylaziridine was observed. This new, unstable molecule was identified based on a comparison of observed molecular constants and those determined by an ab initio MO calculation. The rotational constants are A = 22338.04(4), B = 6618.622(9), and C = 5464.
Masaaki Sugie, Harutoshi Takeo, Chi Matsumura   +2 more
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Cycloaddition and Cyclization Chemistry of 2H-Azirines

2010
Publisher Summary Azirines are regarded as one of the most simple of all heterocyclic systems. They are characterized, by the presence of two carbon atoms and one nitrogen atom, in a three-membered ring, containing a π-bond. Numerous members of the 2H-azirine ring systems are fully characterized.
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Asymmetric radical additions of trialkylboranes to 2H-azirine-3-carboxylates

Chemical Communications, 2004
AbstractFor Abstract see ChemInform Abstract in Full Text.
Erik, Risberg, Andreas, Fischer, Peter, Somfai   +2 more
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Alkylation et silylation de 2h-azirines

Tetrahedron Letters, 1985
Resume Alkylation and silylation of 2H-azitines are reported. Methylation of lithiated azirines is always observed at the carbon atom. N- or C-silytated azirines can be obtained depending on the silyl reagents or substrates.
P.F. Belloir, A. Laurent, P. Mison, R. Bartnik, S. Lesniak   +4 more
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