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- W2013682541 abstract "Several 3-(2,5-anhydro-ribosyl)-pyrazoles of potential medicinal interest have been synthesized by reacting alkynes or alkynylmagnesium bromides with the p-nitrophenylhydrazone of 2,5-anhydro-ribonyl bromide. From a mechanistic standpoint, it has been shown that the sugar-nitrilimine used in these studies reacts more readily as an electrophile than as a dipole. Thus, the hydrazonyl bromide gave exclusively the corresponding phenylethynylhydrazone when treated with phenylethynylmagnesium bromide and led to a 1:1 mixture of phenylethynylhydrazone and pyrazole when reacted with phenylacetylene. This proves that nucleophilic additions onto nitrilimines are much faster than Huisgen's 1,3-dipolar cycloadditions." @default.
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- W2013682541 date "1972-07-10" @default.
- W2013682541 modified "2023-10-14" @default.
- W2013682541 title "Dérivés C-glycosyliques VIII. Synthèse de C-glycosyl-3-pyrazoles à partir d'une nitrilimine dérivée de l'anhydro-2,5-<scp>D</scp>-ribose. Compétition entre cyclo-additions dipolaires-1,3 et cyclisations non concertés" @default.
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- W2013682541 doi "https://doi.org/10.1002/hlca.19720550631" @default.
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