144951-18-8Relevant articles and documents
Cycloaddition Behaviour of Pyrazol-4-one N,N-Dioxides toward Unsaturated Compounds. Stereochemical and Mechanistic Aspect
Eto, Masashi,Yoshitake, Yasuyuki,Harano, Kazunobu,Hisano, Takuzo
, p. 1337 - 1346 (2007/10/02)
The cycloaddition behaviour of 2,5-disubstituted pyrazol-4-one N,N-dioxide 1a-c toward various unsaturated compounds 2 was investigated.The structures of the products were determined on the basis of the 1H and 13C NMR spectral data together with the X-ray crystallographic data.In general the predominant formation of the exo 1,3-dipolar cycloadducts was observed.The cycloaddition behaviour of 1a-c toward 2 is discussed on the basis of the kinetic and computational data.
CYCLOADDITION REACTION OF 4-OXO-4H-PYRAZOLE 1,2-DIOXIDES WITH EPOXYNAPHTHALENE. X-RAY ANALYSIS OF THE CYCLOADDUCT AND SOME COMMENTS ON CYCLOADDITION BEHAVIOR.
Harano, Kazunobu,Yoshitake, Yasuyuki,Eto, Masashi,Hisano, Takuzo
, p. 1707 - 1710 (2007/10/02)
The crystal structure of the cycloadduct of 2,5-bis(methoxycarbonyl)-4-exo-4H-pyrazole 1,2-dioxide with epoxynaphthalene was elucidated.The result indicates that the cycloadduct resulted from the direct 1,3-dipolar cycloaddition.