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Communication | Regular issue | Vol 4, No. 5, 1976, pp.989-995
Published online, 1st January, 1970
DOI: 10.3987/R-1976-05-0989
Reactions of Dihydroindeno-1,3,4-oxaziazepine Derivative with Aryl Isocyanates and Dimethyl Acetylenedicarboxylate

Koji Oe and Otohiko Tsuge*

*Research Institute of Industrial Science, Faculty of Engineering, Kyushu University, 6-1, Kasuga-koen, Kasuga 816-8580, Japan


The reaction of dihydroindeno[3,2-f]-1,3,4-oxadiazepine derivative 1 with excess of phenyl (2a) and p-tolyl isocyanate (2b) afforded novel 1:1 adducts, tetrahydroindeno[2,3-e]-3H-1,3,4-triazepin-2-ones 3a and 3b, in good yields respectively. Similarly, 1 reacted with dimethyl acetylenedicarboxylate to yield dihydroindeno[3,2-d]-2,3-diazepine compound 6. The reaction pathways for the formation of 3 and 6 are also proposed.