title: 2,6-Diamino-5,8-diaza-7,9-dicarba-purine.
abstract: [reaction: see text] The title compound, a constitutional isomer of the natural nucleobase 2,6-diaminopurine, undergoes regioselective electrophilic substitutions at carbon C-9.
authors.affiliation: The Skaggs Institute for Chemical Biology at the Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, USA.
authors.forename: Zhijun
authors.initials: Z
authors.lastname: Wang
authors.forename: Hoan K
authors.initials: HK
authors.lastname: Huynh
authors.forename: Bo
authors.initials: B
authors.lastname: Han
authors.forename: Ramanarayanan
authors.initials: R
authors.lastname: Krishnamurthy
authors.forename: Albert
authors.initials: A
authors.lastname: Eschenmoser
mesh_terms: D015075:2-Aminopurine / Q000031:analogs & derivatives* / Q000138:chemical synthesis* / Q000737:chemistry; D001372:Aza Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D018360:Crystallography, X-Ray; D011684:Purine Nucleosides / Q000138:chemical synthesis* / Q000737:chemistry; D011687:Purines / Q000138:chemical synthesis* / Q000737:chemistry; D013056:Spectrophotometry, Ultraviolet
chemical_list: C478254:2,6-diamino-5,8-diaza-7,9-dicarba-purine; D001372:Aza Compounds; D011684:Purine Nucleosides; D011687:Purines; D015075:2-Aminopurine; C007300:2,6-diaminopurine