Synthesis and Crystal Structure of Bis [1,2,3] Triazolo [1,5‐a:4′,5′‐d] Pyrimidin‐9‐Ones

L'abbé, G.; Godts, Françoise; Toppet, Suzanne; Meervelt, Luc Van; King, G. S. D.

doi:10.1002/bscb.19870960805

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

1988

2014

Publication Types

Select...

Article3

Book2

Relationship

Self Cite0

Independent5

Authors

Journals

Cited by 6 publications

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Molecular Rearrangements of 1h‐1,2,3‐Triazoles and 1,2,3‐Thiadiazoles

L'abbé

1990

Bulletin des Soc Chimique

View full text Add to dashboard Cite

h o l e s are five-membered ring heterocycles which may be considered as ring-closed forms of conjugated 1,9dipoles (Scheme l).' The equilibrium positions are usually shifted towards the aromatic compounds, except for a-diazoketones (or esters) and acyl azides (6 and 8, X = 0) of which the corresponding heterocycles are unknown.* a-Diazothioketones and thioacyl azides, on the contrary, only exist as transient intermediates which cyclize to thiadiazoles and thiatriazoles respectively (5 and 7, X = S).3 lminodiazomethanes and iminoazides (6 and 8, X = NR) most often cyclize to triazoles and tetrazoles (5 and 7, X = NR), but they can be stabilized in the open-chain form by introducing strong electron-withdrawing substituents at the imine n i t r~g e n .~

show abstract