3‐Hydrazinoisoquinoline (2) was synthesized via its N‐oxide derivative by removal of the N‐oxide funçtion with titanium trichloride. Acylation of the hydrazino compound (2) led to suitable starting materials (4 and 6) for cyclization to the novel, linearly fused ring system: tri‐azolo[4,3‐b]isoquinoline, which was more stable in the form of its perchlorate salt. The structure of the first representatives of the new ring system was proved by ir, nmr and ms spectroscopy.
ASJC Scopus subject areas
- Organic Chemistry