... Tetrahedron Letters. Volume 48, Issue 8, 19 February 2007, Pages 1337–1340. ... a Unless otherwise specified, the reaction was conducted with 1.05 equiv of 2 M KCN aqueous solution in the presence of 1 mol % of (R,R,R)-1 in toluene–H 2 O (volume ratio = 1:3) at 0 °C for the ...