The crystal structures of 1-[5-[4,6-bis(methylsulfanyl)-2H-pyrazolo[3,4-d]pyrimidin-2-yl]pentyl]-6-methylsulfanyl-4-(pyrrolidin-1-yl)-1H-pyrazolo[3,4-d]pyrimidine, C(22)H(29)N(9)S(3), and 6-methylsulfanyl-1-[5-[6-methylsulfanyl-4-(pyrrolidin-1-yl)-2H-pyrazolo[3,4-d]pyrimidin-2-yl]pentyl]-4-(pyrrolidin-1-yl)-1H-pyrazolo[3,4-d]pyrimidine, C(25)H(34)N(10)S(2), which differ in having either a pyrrolidine substituent or a methylsulfanyl group, show intermolecular stacking due to aromatic pi-pi interactions between the pyrazolo[3,4-d]pyrimidine rings.
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| http://dx.doi.org/10.1107/s0108270102020681 | DOI Listing |
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