title: Self-complementary purines by quadruple hydrogen bonding.
abstract: The first discrete, self-complementary, quadruply hydrogen-bonded complexes based on the 2,6-diaminopurine (DAP) scaffold have been prepared; regioselective urea formation at the C2 amino group of the heterocycle allows intermolecular dimerization (K(dim) approximately 1-1.6 x 10(3) M(-1) in CDCl3) through a DADA hydrogen bonding motif.
authors.affiliation: Department of Chemistry, University of Florida, PO Box 117200, Gainesville, FL 32611, USA.
authors.forename: Alisha M
authors.initials: AM
authors.lastname: Martin
authors.forename: Roslyn S
authors.initials: RS
authors.lastname: Butler
authors.forename: Ion
authors.initials: I
authors.lastname: Ghiviriga
authors.forename: Rachel E
authors.initials: RE
authors.lastname: Giessert
authors.forename: Khalil A
authors.initials: KA
authors.lastname: Abboud
authors.forename: Ronald K
authors.initials: RK
authors.lastname: Castellano