Regioselective and Diastereoselective Allylic Amination Using Chlorosulfonyl Isocyanate. A Novel Asymmetric Synthesis of Unsaturated Aromatic 1,2-Amino Alcohols
journal contributionposted on 27.03.2003, 00:00 by Ji Duck Kim, Ok Pyo Zee, Young Hoon Jung
The diastereoselective synthesis of unsaturated aromatic 1,2-amino alcohols can be achieved on an epimeric mixture of optically active allylic ethers having a hydroxyl group attached to an allylic chiral center to the π-system using chlorosulfonyl isocyanate. These reactions produced the unsaturated anti-1,2-amino alcohols either exclusively or predominantly only for aromatic derivatives. The anti-selectivity may be explained by the Cieplak electronic model during the conversion from ethers to carbamates.