diiodomethane; LTBIPA 1) THF, hexane, -65 deg C, 5 min, 2) -65 deg C, 3 min; Yield given. Multistep reaction. Yields of byproduct given;

LTBIPA 1) THF, hexane, -65 deg C, 5 min, 2) -65 deg C, 3 min; Yield given. Multistep reaction. Yields of byproduct given;