Synthesis of 7-amino-1,4-dihydro-4-oxo-6-(trifluoromethyl)-1,8-naphthyridines. The use of methylidenemalonate as an activating group and a sulfur assisted cyclization
作者:A. J. Bridges、J. P. Sanchez
DOI:10.1002/jhet.5570270602
日期:1990.9
2,6-Dichloro-3-(trifluoromethyl)pyridine 3 was used to develop a six-step preparation of 7-amino-4-oxo-6-(trifluoromethyl)naphthyridines. The CF3 group deactivated the pyridine ring towards both nucleophiles and electrophiles. A new reagent for pyridone annulation, the aminomethylidenemalonate anion, is described, along with several strategies to manipulate the electron density of substituted pyridines
2,6-二氯-3-(三氟甲基)吡啶3用于开发7-氨基-4-氧代-6-(三氟甲基)萘啶的六步制备方法。CF 3基团使吡啶环朝亲核试剂和亲电试剂失活。描述了一种用于吡啶酮环化的新试剂氨基甲基亚甲基丙二酸酯阴离子,以及几种控制取代吡啶的电子密度的策略。