Regioselective cleavage of the bis-benzylidene acetal of d-mannitol under oxidative and reductive conditions: a new approach to C2-symmetric chiral ligands
作者:Appu Aravind、Subhendu K. Mohanty、T. Veerabhadra Pratap、Sundarababu Baskaran
DOI:10.1016/j.tetlet.2005.03.038
日期:2005.4
A highly regioselective oxidative cleavage of 1,3:4,6-di-O-benzylidene-D-mannitol was carried out using NBS and the resultant product was readily converted to the Q-symmetric chiral ligand, (R,R)-3,4-dihydroxy-1,5-hexadiene. On the other hand, reductive cleavage of 1,3:4,6-di-O-benzylidene-D-mannitol was achieved in a highly regioselective manner using BF(3)center dot OEt2 and Et3SiH to give a highly functionalized benzyl ether, which was converted to a synthetically useful C-2-symmetric bis-amino alcohol derivative. (c) 2005 Elsevier Ltd. All rights reserved.