THE C-O BOND CLEAVAGE OF CYCLIC ETHERS WITH TRIS(PHENYLSELENO)BORANE-LEWIS ACID
Tris(phenylseleno)borane (1) has a hard boron element and a soft selenium element, and therefore it was expected that 1 cleaves the C-O bond.Tetrahydrofuran and tetrahydropyran were cleaved with 1 in the presence of zinc iodide to produce the δ- and ε-phe