Enantioselective synthesis of both enantiomers of 3-hydroxy-4,4-dimethyl-1-phenyl-2-pyrrolidinone
作者:Pelayo Camps、Francesc Pérez、Núria Soldevilla
DOI:10.1016/s0040-4039(99)01383-0
日期:1999.9
(S)-3-Hydroxy-4,4-dimethyl-1-phenyl-2-pyrrolidinone were obtained in good yield and e.e. by enantioselective reduction of 4,4-dimethyl-1-phenylpyrrolidine-2,3-dione with (−)- and (+)-B-chlorodiisopinocamphenylborane, (−)- and (+)-DIP-Chloride®, respectively. The (R)-enantiomer was also obtained by enantioselective hydrogenation of the same precursor using a complex of 1,5-cyclooctadiene Rh(I) and (2S,
通过对映选择性还原4,4-二甲基-1-苯基吡咯烷-得到对映体(R)-和(S)-3-羟基-4,4-二甲基-1-苯基-2-吡咯烷酮的手性助剂。2,3-二酮与( - ) -和(+) -乙DIP-氯化铵- -chlorodiisopinocamphenylborane,( - ) -和(+)®分别。(R)-对映体也可以通过使用1,5-环辛二烯Rh(I)和(2 S,4 S)-1-(叔丁氧羰基)-4-(二苯基膦基)的配合物对同一前体进行对映选择性加氢而获得)-2-(二苯基膦甲基)吡咯烷(S,S)-BPPM,作为手性催化剂。