Abstract
| - Opening of the bridging ether of 8-oxabicyclo[3.2.1]oct-6-ene systems 1,7-fused to a five-memberedcarbocycle that bears a double bond conjugated to that of the oxabicycle can be induced at lowtemperaure by the addition of an organolithium reagent. If this double bond is unsubstituted, theopening occurs via an anti-1,6-addition pathway, and if substituted it takes place by means of amore classical syn SN2‘ addition.
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