Practical synthesis of novel purine analogues as Hsp90 inhibitors

The development of a straightforward synthesis of 4-amino-6-benzyl-6 H-pyrrolo[3,4- d]pyrimidine and 7-amino-2-benzyl-2 H-pyrazolo[4,3- d]pyrimidine derivatives allowed for the preparation of a small family of potential Hsp90 inhibitors. Some of the newly synthesized compounds showed Hsp90 inhibitory activity in preliminary biological assays. [Display omitted]