Formal Total Synthesis of Oximidine II via a Suzuki-Type Cross-Coupling Macrocyclization Employing Potassium Organotrifluoroborates
作者:Gary A. Molander、Florian Dehmel
DOI:10.1021/ja047190o
日期:2004.8.1
A formal total synthesis of oximidine II has been achieved, employing a Suzuki-type coupling approach to construct the highly strained, polyunsaturated 12-membered macrolactone. To achieve this goal, benefit was derived from the stability of potassium alkenyltrifluoroborates to establish conditions for the macrocyclization. The stereocontrolled formation of the cis-1,2-diol subunit was accomplished
已经实现了肟 II 的正式全合成,采用 Suzuki 型耦合方法构建了高度应变的多不饱和 12 元大环内酯。为了实现这一目标,从烯基三氟硼酸钾的稳定性中获益,为大环化建立条件。顺式 1,2-二醇亚基的立体控制形成是使用 Carreira 方案使用非对映选择性、试剂控制添加到手性醛中来完成的。利用 Snieckus 硼氢化试剂获得大环化所需的关键三氟硼酸盐。