References
- Fryer , R. I. , Laurer , R. F. , Trybulski , E. J. , Vitone , S. , Walser , A. and Zenchoff , G. 1983 . J. Heterocyclic Chem. , 20 : 1605
- Obrecht , R. , Herrmann , R. and Ugi , I. 1985 . Synthesis , : 400
- Ugi , I. , Betz , W. , Fetzer , U. and Offermann , K. 1961 . Chem. Ber. , 94 : 2814
- Allenstein , E. , Beyl , V. and Eitel , W. 1969 . Chem. Ber. , 102 : 4089
- Gramain , J. C. and Rémuson , R. 1982 . Synthesis , : 264
- Albert , A. 1969 . J. Chem. Soc. (C) , : 152
- This alternative manner (cf. [3]) of the addition of 4 allows easy temperature control of this exothermic reaction.