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Microwave-assisted synthesis of pyrazolo [3, 4-d] pyrimidines from 2-amino-4, 6-dichloropyrimidine-5-carbaldehyde is under solvent-free conditions. A series of 6-alkynyl-2,4-diaminopyrimidine derivatives bearing various substituents at alkynyl moiety was prepared by the Sonogashira cross-coupling reaction of 2,4-diamino-6-iodopyrimidine using Pd(PPh3)2Cl2 as catalyst.
Dana Hocková,; Antonı?n Holý,; Milena Masojı?dková,; Ivan Votruba. An efficient synthesis of cytostatic mono and bis-alkynylpyrimidine derivatives by the Sonogashira cross-coupling reactions of 2,4-diamino-6-iodopyrimidine and 2-amino-4,6-dichloropyrimidine. Tetrahedron. 2004, 60 (23), 4983-4987.
C. J. B. Clews,; W. Cochran. The structures of pyrimidines and purines. I. A determination of the structures of 2-amino-4-methyl-6-chloropyrimidine and 2-amino-4,6-dichloropyrimidine by X-ray methods . Acta Cryst.. 1948, 14-11.
Hazard Statements: H315-H319-H335
Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation.
Precautionary Statements: P261-P280a-P305+P351+P338-P304+P340-P405-P501a
Avoid breathing dust/fume/gas/mist/vapours/spray. Wear protective gloves and eye/face protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.