Enantioselective access to benzannulated spiroketals using a chiral sulfoxide auxiliary
作者:Harry R. M. Aitken、Daniel P. Furkert、Jonathan G. Hubert、James M. Wood、Margaret A. Brimble
DOI:10.1039/c3ob41065j
日期:——
synthesis of bisbenzannulated spiroketals using a chiral sulfoxide auxiliary. Our primary focus was on the synthesis of the 3H-spiro[benzofuran-2,2′-chroman] ring system, the spirocyclic core of the rubromycin family. Our strategy employed the use of lithium–halogen exchange on a racemic bromospiroketal in order to attach a chiral sulfoxide, thus producing two diastereomers. The diastereomers were
本文介绍了我们使用手性亚砜辅助物开发双苯并氮杂螺环酮的不对称合成的努力。我们的主要重点是3 H-螺[苯并呋喃-2,2'-chroman]环系统的合成,这是红霉素家族的螺环核心。我们的策略是在外消旋溴螺酮上使用锂-卤素交换,以连接手性亚砜,从而产生两个非对映异构体。非对映异构体是可分离的,从而能够分离出每种螺酮对映体。随后从每个非对映异构体上切割亚砜基团,得到了高对映体纯度的相应母体螺环。