Formal total synthesis of (+)-wortmannin using catalytic asymmetric intramolecular aldol condensation reaction
作者:Hiroki Shigehisa、Takashi Mizutani、Shin-ya Tosaki、Takashi Ohshima、Masakatsu Shibasaki
DOI:10.1016/j.tet.2005.03.038
日期:2005.5
A catalytic process for the synthesis of optically active C4-substituted tetrahydroindandiones using an asymmetric intramolecular aldol condensation reaction was developed. When 30 mol% of phenylalanine and 50 mol% of pyridinium p-toluenesulfonate were used under highly concentrated conditions, a variety of C4-substituted tetrahydroindandiones and octahydronaphthalenediones were obtained in high yield
开发了使用不对称分子内羟醛缩合反应合成旋光C4取代的四氢茚二酮的催化方法。当在高浓度条件下使用30摩尔%的苯丙氨酸和50摩尔%的对甲苯磺酸吡啶鎓时,可以高收率(最高收率89%)和高对映体过量(最高收率)获得各种C4取代的四氢茚二酮和八氢萘二酮。 94%ee)。其中一种产品已成功转化为合成磷脂酰肌醇3-激酶抑制剂渥曼青霉素的关键中间体,从而实现了(+)-渥曼青霉素的正式全合成。