Abstract:
:The crystal and molecular structures of 6-methylmercaptopurine trihydrate and of azathioprine dihydrate were determined by the use of three-dimensional, X-ray, diffractometer data and were refined by least squares. Both molecules crystallize in the N(9)-H tautomer form, in contrast to the N(7)-H tautomer form found in crystals of 6-mercaptopurine. Unlike 6-mercaptopurine, or other thiopurines that have unsubstituted thio groups, the sulfur atoms of 6-methylmercaptopurine and azathioprine do not act as hydrogen-bond acceptors in the crystal structures. These two derivatives of 6-mercaptopurine assume a conformation in which the substituents on the sulfur atom are directed away from the imidazole moiety of the purine.
journal_name
J Pharm Scijournal_title
Journal of pharmaceutical sciencesauthors
Cook WJ,Bugg CEdoi
10.1002/jps.2600640206subject
Has Abstractpub_date
1975-02-01 00:00:00pages
221-25issue
2eissn
0022-3549issn
1520-6017pii
S0022-3549(15)40065-6journal_volume
64pub_type
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