CAS: 500539-08-2

6-Chloro-9-(propan-2-yl)-9H-purine is an intermediate in the synthesis of nucleoside analogues. It is obtained by the catalyzed reaction of acetonitrile and purines, which undergoes regioisomerization to form a mixture of 6-chloro-9-(propyl)- and 6-chloro-9-(butyl)purine. This intermediate can be used for the alkynylation of amino acids or peptides with alkynes. The selective formation of one regioisomer can be achieved by using a chiral catalyst or by reacting with an optically active reagent such as (+)-camphor sulfonic acid.