... Construction of Trans-Fused Polycyclic Ethers: Methodology for the Brevet oxin s Paul A. Bartlett* and Pauline C. Ting Department of Chemistry, University of California, Berkeley, California 94720 Received January 13, 1986 ... Scheme I J. Org. Chem., Vol. 51, No. 12, 1986 2231 ...