Multi-step reaction with 3 steps 2: LAH / diethyl ether3: 67 percent / 1.) PhSeCl, 2.) SiO2 / multistep reaction: 1.) CH2Cl2, -40 deg C, 2 h, 2.) H2O, 2 h; rearrangement of furfuryl alcohol derivatives in the presence of PhSeCl