1. Four-Membered Rings from Isocyanides - Recent Advances
2. 1,2,4-Trisubstituted 1,2,3-Triazolium Salts from Nitrilimines and Isocyanides
3. This pertains to the products that are formed by self-conden-sation of benzil monohydrazones and other ?-oxo hydra-zones; early examples for the erroneous 1,2,5,6-tetrazocine structure are collected in ref. [4a], more recent cases can be located in: a) A. Aydin, H. Feuer, Chim. Acta Turc. 1979, 7, 121; Chem. Abstr. 1980, 93, 220680g; b) C. Glidewell, D. Lloyd, K. W. Lumbard, J. Chem. Soc., Dalton Trans. 1987, 501
4. Über die dimerisierende Kondensation des Acetylglyoxylsäure‐äthylester‐α‐hydrazons
5. The material proved resistent not only to 6N-14N NaOH but also to oxidants such as potassium permanganate.