and Jacobsen’s hydrolytic kinetic resolution as the key steps. Synthesis of both real isolation and erroneously proposed structure necessitated the revision of the absolute configuration of greensporone F and dechlorogreensporone F. The erroneous representation of (2S,5S,8S)-configuration in greensporone F and dechlorogreensporone F was assigned to be (2S,5R,8R) by comparison with the NMR data and
真正的分离产物(2 S,5 R,8 R)-greensporone F和(2 S,5 R,8 R)-dechlorogreensporone F,具有顺式-2的14元间苯二酸内酯的首次不对称合成完成了5-二取代的
四氢呋喃环系统。合成的特征是后期
路易斯酸催化的立体选择性分子内oxa-Michael反应E选择性开环复分解,De Brabander的酯化反应和Jacobsen的
水解动力学拆分是关键步骤。合成真实的隔离结构和错误提出的结构都需要修改Greensporone F和dechlorogreensporone F的绝对构型。将Greensporone F和dechlorogreensporone F中(2 S,5 S,8 S)-构型的错误表示指定为( 2 S,5 R,8 R)与NMR数据进行比较,合成化合物的比旋光度与报道的数据进行比较。