Hydrazines, Hydrazones, Osazones, and Derived Heterocycles

L-Gulose derivatives suitable for use in the synthesis of bleomycin have been obtained via 6-hydrazone derivatives of 6-aldehydo-D- 

A variety of 2-mono- and 2,3-di-hydrazone derivatives of dehydro -L-ascorblc acid have been synthesized, and some converted to 

Conditions have been reported for mono- and di-N-acetylation of 

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