## Abstract Condensation of 3‐amino‐4‐carbethoxy‐pyrazoles with nitriles led to a new synthesis of 6‐C‐substituted pyrazolo[3,4‐d]pyrimidines and 6‐amino‐pyrazolo‐[3,4‐b]pyridines. The structure of the new derivatives was established by independent syntheses. The pyrazolo‐pyrimidines can be cleaved
Heilmittelchemische Untersuchungen in der heterocyclischen Reihe. Mitteilung. Pyrazolo-(3,4-d)-pyrimidine
✍ Scribed by P. Schmidt; J. Druey
- Publisher
- John Wiley and Sons
- Year
- 1956
- Tongue
- German
- Weight
- 306 KB
- Volume
- 39
- Category
- Article
- ISSN
- 0018-019X
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✦ Synopsis
Abstract
The synthesis of 4‐ and 6‐substituted 1‐H‐ and 1‐phenyl‐pyrazolo‐(3,4‐d)‐pyrimidines is described. It starts from ethyl ethoxymethylene cyanoacetate from which the 4‐hydroxy‐pyrazolo‐(3,4‐d)‐ pyrimidines can be obtained in two steps through the corresponding 2‐substituted 3‐amino‐4‐carbethoxy‐pyrazoles.
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