barium dihydroxide in water 1 h; Heating;

1: 59 percent / acetonitrile / 1.) 25 deg C, 1h, 2.) 55 deg C, 24h 2: 94 percent / Ba(OH)2*8H2O / H2O / 1 h / Heating View Scheme

toluene-4-sulfonic acid; lithium diisopropyl amide 1.) THF, 0 deg C, 1h, 2.) photooxygenation/ether, -78 deg C, 3.) THF, -78 deg C; Yield given. Multistep reaction;