Dj. Augeri et Ar. Chamberlin, N-AMINOAZIRIDINYLHYDRAZONES - HIGHLY DIASTEREOSELECTIVE ALKYLATION WITHOUT CHELATION, AND A SYN-DIRECTING EFFECT, Tetrahedron letters, 35(31), 1994, pp. 5599-5602
The alkylation of C-2-symmetric N-aminoaziridinylhydrazone anions show
s excellent diastereoselectivity despite the absence of chelating grou
ps in the chiral auxiliary. In contrast to other dialkylhydrazones, az
iridinylhydrazones exhibit a syn-directing effect analogous to that ob
served for arenesulfonylhydrazones.