F. Benedetti et al., REGIOSELECTIVE AND STEREOSELECTIVE RING-OPENING OF 2,3-EPOXYALCOHOLS WITH DIETHYLALUMINUM AZIDE, Tetrahedron letters, 39(43), 1998, pp. 7971-7974
2,3-Epoxyalcohols react with diethylaluminium azide under mild conditi
ons to give 3-azido-1,2-diols resulting from the regio- and stereosele
ctive attack of the nucleophile at the epoxide C-3. The high regiosele
ctivity (>25:1) observed with both cis and trans substituted epoxides
is not affected by bulky substituents at C-3. The method has been succ
essfully applied also to the synthesis of diaminodiol dipeptide isoste
res, (C) 1998 Elsevier Science Ltd. All rights reserved.