Diazasemibullvalenes Synthesis

Diazasemibullvalenes Synthesis, Structural Characterization, Theoretical Analysis and Reaction Chemistry. 

Zhang S, Wei J, Zhan M et al (2012) 2,6-Diazasemibullvalenes synthesis, structural characterization, theoretical analysis and reaction chemistry. J Am Chem Soc 134 11964-11967... 

Other cycliaationa- Oebromination converts (46) into the 2.6-diazasemibullvalene (47) nmr studies suggest that Cope rearrangement is rapid and that (47) is the predominant valence isomer.53 A new aziridine ring-forming reaction (from f-amine oxides and base) has been applied to the synthesis of (48).54 A novel route to the pavine skeleton (49)33 and regiospecific synthesis of (50) have been described. 

Diazasemibullvalenes 405 have been prepared from chloro-2-aza-1,3-dienes and TCNE in a simple one-pot synthesis ". A remarkable condensation can be observed when TCNE reacts with its monoanion. The reaction is promoted by Lewis acids. The heterocyclic anion was isolated and characterized as the tetraphenylarsonium salt 406". ... 

Oxidation of C-H bonds to C=0 bonds by O2 only or N-oxides and DMSO Synthesis of A -bipyrrolinones and pyrrolino[3,2-h]pyrrolinones from 2,6-diazasemibullvalenes. 

On the other hand, 2,6-diazasemibullvalene (NSBV) features an aziridine ring and unique polycyclic strained skeleton, which is expected to show unique properties and reactions toward the synthesis of A-heterocycles. NSBV is also... 

The author successfully established experimental models for structurally and theoretically interesting 2,6-diazasemibullvalenes (NSBVs). Efficient one-pot synthesis and isolation of a series of NSBVs were developed by oxidant-induced C-N bond... 

Lanthanum Triflate-Catalyzed Rearrangement-Cycloaddition of 2,6-Diazasemibullvalenes and Azides Synthesis of Triazabrexadienes... 

Oxidation of 2,6-Diazasemibullvalenes by O2 or -Oxides Synthesis of A -Bipyrrolinones and Pyrrolinof3,2-bJPyrrolinones... 

Zhang S, Zhan M, Zhang WX et al (2014) Diastereoselective nucleophilic ring-opening reactions of 2,6-diazasemibullvalenes for the synthesis of diverse functionalized 5 -bipyrroline derivatives. Chem Eur J. doi 10.1002/chem.201402911... 

Scheme 23 Formation of siloles and (Z,Z)-dienylsilanes 4.7.2 Synthesis of 2,6-Diazasemibullvalenes...

Scheme 24 Synthesis of 2,6-diazasemibullvalenes from 1,4-dilithio-l,3-butadienes and nitriles...

Zhang S, Zhang WX, Xi Z (2013) Lewis acid-catalyzed site-selective cycloadditions of 2,6-diazasemibullvalenes with isocyanides, azides and diazo compounds for the synthesis of diaza- and triaza-brexadiene derivatives. Angew Chem Int Ed 52 3485-3489... 

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