the present invention discloses aminothiol compounds and acylated derivatives thereof , which respectively have general formula i and formula ii wherein r 1 - r 6 are substitutable ligands . such compounds can perform as superior catalysts in asymmetric addition reactions of organic zinc and aldehyde . according to the present invention , the compounds is needed only less than 0 . 02 % of main reactants to obtain enantioselectivity higher than 99 % enantiomeric excess , whereby the asymmetric reactions can become very economic .