作者:Christine Gravier-Pelletier、Olivia Andriuzzi、Yves Le Merrer
DOI:10.1016/s0040-4039(01)02126-8
日期:2002.1
efficient synthesis of enantiopure highly functionalized eight-membered carbocyclic rings is described from 1,2:5,6-bis-epoxides issued from d-mannitol. The key cyclization step involves the metathesis of 1,9-diene using Grubbs’ catalyst or the pinacolic coupling of 1,8-dialdehyde resulting from the oxidative cleavage of the previous diene. In the specific case of ring-closing metathesis cyclization, the
从d-甘露糖醇发布的1,2:5,6-双环氧化物描述了对映体高官能化的八元碳环的短而有效的合成。关键的环化步骤涉及使用Grubbs催化剂进行1,9-二烯的复分解或由先前的二烯的氧化裂解产生的1,8-二醛的松酸偶联。在闭环易位环化的特定情况下,已经评估了构象受限的二烯与柔性构象的二烯的影响。