<i>N</i>-(2-Amino-1,6-dihydro-5-nitroso-6-oxopyrimidin-4-yl)-<scp>L</scp>-isoleucine–water (4/1): interplay of molecular and supramolecular structures
作者:John N. Low、Debbie Cannon、Antonio Quesada、Antonio Marchal、Manuel Melguizo、Manuel Nogueras、Adolfo Sánchez、Christopher Glidewell
DOI:10.1107/s0108270101002475
日期:2001.5.15
In the title compound, 2C(10)H(15)N(5)O(4) .0.5H(2)O, there are two independent molecules of the pyrimidinylisoleucine in general positions and a water molecule lying on a twofold rotation axis. The bond lengths within the organic moieties demonstrate significant polarization of the electronic structure. Each of the organic molecules participates in 12 intermolecular hydrogen bonds, of O--H . . . O and N--H . . . O types, while the water molecule acts as a double donor and as a double acceptor of O--H . . . O hydrogen bonds. The organic components are linked by the hydrogen bonds into a single three-dimensional framework, reinforced by the water molecules.
Alkoxy-5-nitrosopyrimidines: Useful Building Block for the Generation of Biologically Active Compounds
作者:Antonio Marchal、Manuel Nogueras、Adolfo Sánchez、John N. Low、Lieve Naesens、Erik De Clercq、Manuel Melguizo
DOI:10.1002/ejoc.201000195
日期:——
Several alkoxy-5-nitrosopyrimidines were synthesised and high regioselective and sequential nucleophilic aromatic substitution of methoxy groups in 2-amino-4,6-dimethoxy-5-nitrosopyrimidine was observed. The approach was applied to the synthesis of valuable polyfunctionalised aminopyrimidines capable of mimicking fused heterobicyclic derivatives of biological interest. In addition, new compounds were