Results 111 to 120 of about 74,332 (157)

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
openaire   +2 more sources

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
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

ChemInform Abstract: REACTION OF 2H‐AZIRINES WITH NITRONES

Chemischer Informationsdienst, 1974
AbstractDiphenylazirin (I) reagiert mit den Isochinolin‐N‐oxiden (I) zu den Isochinolinen (III) und dem Diamid (IV).
A. PADWA, K. CROSBY
openaire   +1 more source

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.
openaire   +1 more source

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
openaire   +1 more source

Nitrile Ylides and Nitrenes from 2H-Azirines

1982
2H-Azirines represent versatile substrates which can serve as useful precursors for the synthesis of other heterocyclic rings.1–7 An unusual feature of this three-membered heterocyclic ring is that it is susceptible to attack by both electrophilic and nucleophilic reagents.7 In addition, the 2π electrons present in the ring are known to participate in ...
Albert Padwa, Per H. J. Carlsen
openaire   +1 more source

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
openaire   +1 more source

Thermal rearrangements of 2,3-diphenyl-2H-azirine

Journal of the Chemical Society, Perkin Transactions 1, 1973
Heating 2,3-diphenyl-2H-azirine in a sealed tube at 250 °C for 3 h yields 2-phenylindole, 2,3,4,5-tetraphenylpyrrole, 2,4,5-triphenylimidazole, and 1-benzyl-2,4,5-triphenylimidazole as major products, with tetraphenylpyrazine, tetraphenylpyrimidine, pentaphenylpyridine, benzonitrile, benzamide, and stilbene being produced in smaller yield.
John H. Bowie, Brian Nussey
openaire   +1 more source