名称:
                                Synthesis of novel 2,3-substituted-2,4-dihydro-pyrazolo[4,3-d]pyrimidine-5,7-diones
                             
                            
                                摘要:
                                Novel 2,3-substituted-2,4-dihydro-pyrazolo[4,3-d]pyrimidine-5,7-diones were successfully synthesized with moderate to good yields using a new synthetic approach. The structures of the regio-isomers in this series were determined by single crystal X-ray analysis and NMR spectra. (C) 2009 Elsevier Ltd. All rights reserved.
                             
                                                            
                                    DOI:
                                    10.1016/j.tetlet.2009.08.098