A chiral complex, in situ prepared from (-)quinine and CoCl2 was used as catalyst for asymmetric reduction of aromatic prochiral ketones: pR2C6H4COR1 (R1, R2 shown in Tab.

The asymmetric borohydride reduction of prochiral ketones by different kinds of chiral phase transfer catalysts under the condition of S L phase transfer catalysis was explored and the influence of different solvents, temperatures and catalysts to the reaction was investigated.

Asymmetric borane reduction of prochiral ketones is a good process to the synthesis of enantiomerically enriched secondary alcohols.

Using 10 as the catalyst, six prochiral ketones were reduced enantioselectively with borane and the results were compared with those with 1,1- diphenylprolinol as catalys.

Two groups of catalysts,(S)-diphenylprolinol(1) and(2S)-diphenylhydroxymethyl-(4S)-phenoxy-pyrrolidine(2),(R)-2-amino-1,1-diphenyl-3-(2-naphthyl)-1-propanol(3) and(R)-1-(1′-amino-2′-naphthylethyl)-cyclopentanol(4),were prepared and used in the enantioselective reduction of six prochiral ketones with borane.

Asymmetric reduction of prochiral ketones using oxazaborolidines has become one of the standard tools for the synthetic chemist, allowing access to enantiomerically enriched secondary alcohols with excellent enantiomeric excess that may seve as the chiral ligands for enantionselectivity synthesis and highly useful intermediates in the sy.

A convenient CZE method was developed to separate 7 chiral secondary aromatic alcohols using sulfated β-cyclodextrin(S-β-CD)as chiral selector.

Enantioselective reduction of prochiral aromatic ketones by samarium metal/chiral compounds/I_2/i-PrOH system;

Methods A serials of thiosemicarbazones were synthesized by utilizing aromatic aldehyde,aromatic ketone and thiosemicarbazide in aqueous solution under ultrasound irradiation.

Asymmetric reduction of aromatic ketones with baker’s yeast was studied.