The invention discloses a method for asymmetric synthesis of an anti-Aids
drug, namely an
efavirenz key intermediate. The method comprises the following steps that in an
organic solvent,
fluoride, anorganic ligand (9S)-6'-methoxy-deoxidized
cinchonine-9-ol and cyclopropyl
acetylene are evenly stirred, an organic
zinc solution is slowly added at the temperature of 15-25 DEG C, after constant-temperature stirring is conducted for 3-5 hours,
tetraisopropyl titanate is added, stirring is continued to be conducted for 2-3 hours, then the temperature is decreased to minus 20 DEG C to 0 DEG C, 5-chloro-2-amino-trifluorobenzophenone is added, a mixture is stirred at the temperature of minus 20 DEG C to 0 DEG C for 5-12 hours, after a reaction is completed, a
proton source is added for a quenchingreaction, then a certain amount of
activated carbon is added, a mixture is stirred for 0.5 hour and filtered, an organic phase and a water phase are separated in an extraction mode, the organic phaseis washed, dried and subjected to vacuum concentration, and after purification, the
efavirenz key intermediate is obtained. The technological process is short, the technological condition is mild, operation is easy,
environmental protection is achieved, the cost is low, and the method is suitable for industrial production.