The stereoselective synthesis of enantioenriched ANTI- and SYN-4-aminoalk-1-yn-3-ols is described. Initial reaction of racemic 3-(methoxymethoxy)allenylzinc with enantiopure Ellman’s ( SS )-( TERT-butylsulfinyl)imines was shown to give straightforward and highly stereoselective access to ANTI-( SS ,3 S,4 R)-3-(methoxy-methoxy)-4-sulfinamidoalk-1-ynes. Upon treatment with dry methanolic hydrochloric
2-amino alcohols by the addition of 3-chloro- and 3-methoxymethoxy- allenylzincs to chiral tert-butylsulfinylimines is described. The methodology is applicable to the preparation of alkynyl 2-amino-1,3-diols (O,N,O stereotriads) usingα-alkoxy tert-butylsulfinylimines as chiral starting materials. The scope and limitations of the methodology along with recent applications to the efficient asymmetric syntheses