Stereoselective allylation of aldehydes on solid support and its application in biology-oriented synthesis (BIOS)
作者:Victor Mamane、Ana B. García、Jayant D. Umarye、Torben Lessmann、Stefan Sommer、Herbert Waldmann
DOI:10.1016/j.tet.2007.01.041
日期:2007.6
allylation of aldehydes on solid support is reported. Different kinds of chiral allylboron reagents with complementary direction of stereoinduction were applied successfully in this reagent-controlled transformation. The homoallylic alcohol products are generated with high levels of stereoselectivity and in high yields. The crotylation of aldehydes on solid support employing (E)- and (Z)-Ipc2crotylborane
报道了在固体载体上醛的不对称烯丙基化的系统研究。具有立体诱导互补方向的不同种类的手性烯丙基硼试剂已成功应用于该试剂控制的转化中。均丁醇产物以高水平的立体选择性和高产率产生。使用(E)-和(Z)-Ipc 2在固相载体上醛的crotylation。巴豆基硼烷还以很高的立体诱导水平和高收率进行。描述了该方法在通过烯丙基部分的后续修饰来合成化合物集合中的应用。特别地,已经通过包括天然产物的环释放方法合成了γ-和δ-内酯的集合。另外,已经报道了解决固体载体上双键的长期存在问题的方法。我们还证明了以迭代方式在固体载体上应用醛的立体选择性烯丙基化以生成多元醇结构的可行性。