toluene-4-sulfonic acid in benzene acetalisation; 48 h; Heating;

2,6-dicarboxypyridinium chlorochromate in acetonitrile T=20°C; 0.233333 h;

1: 1.) n-BuLi / 1.) THF, hexane, -78 deg C, 30 min, 2) -78 deg c to 25 deg C 2: 77 percent / conc. HClO4 / CH2Cl2 / 1.) 0 deg C, 1 h, 2.) room temperature, 2 h View Scheme

Grignard reaction;