作者:Michael T. Crimmins、Charlotte A. Carroll、Bryan W. King
DOI:10.1021/ol991345t
日期:2000.3.1
[reaction: see text] The synthesis of the C1-C13 fragment 3 of leucascandrolide A has been completed utilizing a stereoselective and regioselective reductive cleavage of a highly functionalized spiroketal to incorporate the cis-2,6-disubstituted tetrahydropyan. The spiroketal was constructed by addition of a lithiated pyrone 5 to aldehyde 6.
[反应:见正文]利用高度官能化的螺酮的立体选择性和区域选择性还原性裂解并结合了顺式2,6-二取代的四氢吡喃,完成了芥子酸内酯A的C1-C13片段3的合成。通过向乙醛6中添加锂化的吡喃酮5构建螺帽。