An Azirine Strategy for the Synthesis of Alkyl 4-Amino-5-(trifluoromethyl)-1H-pyrrole-2-carboxylates
作者:Alexander Khlebnikov、Liya Funt、Olesya Tomashenko、Mikhail Novikov
DOI:10.1055/s-0037-1610840
日期:2018.12
alkyl 4-amino-3-aryl-1-methyl-5-(trifluoromethyl)-1H-pyrrole-2-carboxylates via methylation/hydrazinolysis. 1-(3,3,3-Trifluoro-2,2-dihydroxypropyl)pyridin-1-ium bromide serves as a trifluoromethyl-containing building block for the preparation of trifluoromethyl-substituted aminopyrroles based on the 2H-azirine ring expansion strategy. The primary products, 3-aryl-2-(methoxycarbonyl)-4-(pyridin-1-ium
摘要 1-(3,3,3-三氟-2,2-二羟丙基)吡啶鎓-1-溴化物用作含三氟甲基的结构单元,用于基于2 H-叠氮基扩环策略制备三氟甲基取代的氨基吡咯。主要产物3-芳基-2-(甲氧基羰基)-4-(吡啶-1-基-1-基)-5-(三氟甲基)吡咯-1-化物可通过H 2 / PtO 2氢化形成3-芳基-4-(哌啶-1-基)-5-(三氟甲基)-1 H-吡咯-2-羧酸烷基酯并转化成4-氨基-3-芳基-1-甲基-5-(三氟甲基)烷基-1 H-吡咯-2-羧酸盐通过甲基化/肼解作用。 1-(3,3,3-三氟-2,2-二羟丙基)吡啶鎓-1-溴化物用作含三氟甲基的结构单元,用于基于2 H-叠氮基扩环策略制备三氟甲基取代的氨基吡咯。主要产物3-芳基-2-(甲氧基羰基)-4-(吡啶-1-基-1-基)-5-(三氟甲基)吡咯-1-化物可通过H 2 / PtO 2氢化形成3-芳基-4-(哌啶-1-基)-5-(三氟甲基)-1