作者:Christian Bukovec、Alexander O. Wesquet、Uli Kazmaier
DOI:10.1002/ejoc.201001400
日期:2011.2
Stannylated allylic substrates are versatile building blocks for organic synthesis. Pd0-catalysed coupling reactions of 2-stannylated allylic carbonates, acetates and phenoxides with amines, malonates, phenoxides, imides and distannanes provide the corresponding substituted allylic compounds, which are suitable for subsequent modifications including Stille coupling reactions. The reaction mechanisms
Stannylated 烯丙基底物是用于有机合成的通用构件。2-甲锡烷基化烯丙基碳酸酯、乙酸酯和酚盐与胺、丙二酸酯、酚盐、酰亚胺和二锡烷的 PdO 催化偶联反应提供了相应的取代烯丙基化合物,这些化合物适用于包括 Stille 偶联反应在内的后续改性。反应机理取决于温度和所用的亲核试剂。Tsuji-Trost 烯丙基取代在低温下与有机亲核试剂发生。另一方面,当二锡烷在较高温度下使用时,通过消除甲醇三丁基锡而原位形成的丙二烯的 PdO 催化双金属化占主导地位。