n-butyllithium; bis(trimethylsilyl)dichloromethane 1.) hexane, THF, Et2O, n-pentane, -110 deg C, 2 h, 2.) hexane, THF, Et2O, n-pentane, a) -110 deg C, 30 min, b) -110 deg C - RT, overnight; Multistep reaction. Title compound not separated from byproducts;

n-butyllithium 1.) hexane, THF, Et2O, n-pentane, -110 deg C, 2 h, 2.) hexane, THF, Et2O, n-pentane, a) -110 deg C, 30 min, b) -110 deg C - RT, overnight; Multistep reaction. Title compound not separated from byproducts;

1.) hexane, THF, Et2O, n-pentane, -110 deg C, 2 h, 2.) hexane, THF, Et2O, n-pentane, a) -110 deg C, 30 min, b) -110 deg C - RT, overnight; Multistep reaction. Title compound not separated from byproducts;