Totally atom economical tandem-metathesis and Diels–Alder approach to polycyclic compounds
作者:Donatella Banti、Michael North
DOI:10.1016/s0040-4039(02)00009-6
日期:2002.2
alkynes undergo a series of tandem metathesis reactions when treated with Grubbs’ catalyst. The products of this cascade are dienes which can be trapped in situ by dienophiles in Diels–Alder reactions to yield polycyclic compounds.
undergo a stereoselective DielsAlder reaction, giving access to a range of polycyclic heterocycles. The process is compatible with both terminal and internal alkynes, and depending upon the structure of the alkene can give symmetrical or unsymmetrical products. Mechanistic studies have shown that the initial metathesis reaction is between the strained norbornene and Grubbs' catalyst, rather than between