Regitz

Houben-Weyl Methoden der Organishen Chemie, Regitz, M. Giese, B., Eds. Verlag Georg Thieme Stuttgart, 1989 Vol. E19, part B. 

Regitz, M, Heydt, H In 7 3-Dipolar Cycloadditton Chemistry, Padwa A, Ed, Wiley New York, 1984, p 393 and literature cited therein... 

Regitz, Chem. Rev. 90, 191-213 (1990). See also M. Regitz and O. J. Scherer, Multiple Bonds and Low Coordination in Phosphorus Chemistry, Georg Thieme Verlag, Stuttgart, (1990). 

S834 U. Hees, J. Schneider, O. Wagner, and M. Regitz, Synthesis, 834... 

AGE644 P. Binger, R. Milezarek, R. Mynott, M. Regitz, and W. Rosch, Angew. 

Quinone diazides can also be obtained by the diazo group transfer reaction of 4-tosyl azide. For example, 9-diazo-10-anthrone (2.55) is formed from anthrone (2.54) if the reaction is carried out in an ethanol-piperidine mixture. On the other hand, if ethanol is replaced by pyridine, dimerization with loss of molecular nitrogen takes place and the azine 2.56 is isolated (Scheme 2-32 Regitz, 1964 Cauquis et al., 1965). In the preceding discussion tosyl azide was shown to be an electrophilic reagent. It therefore seems likely that it is not the anthrone 2.54 but its conjugate base which reacts with tosyl azide. 

Regitz M, Maas G (1986) Diazo compounds properties and syntheses. Academic, New York... 

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