Synthesis of cyclic ethers via 5-exo iodonium assisted epoxide ring expansion.
作者:Eleuterio Alvarez、Eduardo Manta、Julio D Martin、Matias L Rodriguez、Catalina Ruiz-Perez
DOI:10.1016/s0040-4039(00)87843-0
日期:——
The transannular cyclization of (Z,Z)-1-hydroxy-cyclonona-2,6-diene by iodonium assisted oxirane ring expansion was studied. The regioselectivity for the [4.3.1] vs [5.2.1] 10-oxabicyclo decane skeletons is high, and the iodine addition is also highly trans-selective. The results are rationalized in terms of a tricyclic oxoniumion intermediate.