Synthesis of various substituted spirroindoline-3,4'-pyran derivatives
The indole nucleus is the well known heterocycle. Compounds carrying the indole moiety exhibit antibacterial and fungicidal activities. Spirooxindole ring systems are found in a number of alkaloids like horsifiline, spirotryprostatin and elacomine. As a part of our research work devoted to the preparation of heterocyclic compounds involving indole derivatives.