DFT Study on Two Plausible Mechanistic Routes to Pyrazolo[3,4-d]pyrimidine-4- Amines from Pyrazoloformimidate

Author:

Al-Azmi Amal1

Affiliation:

1. Chemistry Department, Kuwait University, P. O. Box 5969, Safat 13060, Kuwait

Abstract

Pyrazolo[3,4-d]pyrimidine-4-amine was prepared at room temperature in a catalyst- free medium with moderate yield and characterized by spectroscopic and X-ray diffraction techniques. Two possible mechanistic routes were suggested for its formation. Route 1 entails attack by the N of the amine on the imidate carbon followed by Dimroth rearrangement after cyclization. Route 2 is the nucleophilic attack by the amine on the CN function followed by cyclization to pyrazolo[3,4-d]pyrimidine-4-amine. Density functional theory (DFT) calculation studies of the two proposed reaction pathways illustrated that the Route 2 reaction was more likely than that of Route 1.

Funder

Kuwait University

Publisher

Bentham Science Publishers Ltd.

Subject

Organic Chemistry

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