Metal-Free One-Pot Synthesis of 3-Phosphinoylbenzofurans via Phospha-Michael Addition/Cyclization of H-Phosphine Oxides and <i>in Situ</i> Generated <i>ortho-</i>Quinone Methides
A novel metal-free one-pot protocol for the effective and efficient synthesis of 3-phosphinoylbenzofurans via a phospha-Michael addition/cyclization of H-phosphine oxides and in situ generated ortho-quinone methides is described. Based on the expeditious construction of C(sp2)–P bonds, asymmetricsynthesis of optically pure 3-phosphinoylbenzofurans containing chiral P-stereogenic center has also been
描述了一种新颖的无金属一锅方案,该方案通过H-膦氧化物的磷化-迈克尔加成/环化作用和原位生成的邻醌甲基化物来有效和高效地合成3-膦酰基苯并呋喃。基于C(sp 2)-P键的快速构建,还通过使用手性R P -(-)-薄荷基苯基膦氧化物探索了含手性P-立体异构中心的光学纯3-膦酰基苯并呋喃的不对称合成。