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40.7 Product Class 7: Hydrazines and Hydrazinium Salts

DOI: 10.1055/sos-SD-040-00813

Rademacher, P.Science of Synthesis, (2009401133.

General Introduction

Depending on the number and position of substituents, hydrazines are usually classified as mono- 1, 1,1-di- 2, 1,2-di- 3, tri- 4, and tetrasubstituted 5 derivatives of hydrazine (Scheme 1). Further addition of substituents to the nitrogen atoms or protonation leads to hydrazinium salts 6 and 7. Zwitterionic species, hydrazinium C,N-betaines 8, are also known. Similar to the hydrazines 15, the hydrazinium salts 6 and 7, as well as the hydrazinium C,N-betaines 8, might be further classified according to their substitution. Although the structures of these compounds appear to be quite simple, at least those with several substituents are generally difficult to access.

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