Kinetic resolutions in anti aldol reactions with racemic 2-phenylthio aldehydes: asymmetric synthesis of cyclic ethers and lactones with phenylthio migration
作者:Kelly Chibale、Stuart Warren
DOI:10.1016/s0040-4039(00)74262-6
日期:1992.7
Kinetic resolutions in Lewis acid catalysed asymmetric anti aldol reactions of the boron enolate of imide (2) with racemic 2-phenylthio aldehydes (3a) – (3c) give good yields of anti,anti aldols (7). Synthesis of homochiral cyclic ethers (4a) – (4c) and (5a) – (5c), and a simple novel route to homochiral lactones (6a) – (6c) are described.
在路易斯酸催化的酰亚胺化硼烯酸酯(2)与外消旋2-苯硫基醛(3a)–(3c)的不对称反羟醛反应中的动力学拆分可得到良好的反,反羟醛(7)收率。描述了手性环状醚(4a)-(4c)和(5a)-(5c)的合成,以及制备手性内酯(6a)-(6c)的简单新途径。