Chemoenzymatic formal synthesis of (−)-balanol. Provision of optical data for an often-reported intermediate
作者:Bradford Sullivan、Tomas Hudlicky
DOI:10.1016/j.tetlet.2008.06.026
日期:2008.8
Formal total synthesis of (-)-balanol was accomplished from bromobenzene in 13 steps via the bis-benzyl derivative 3, whose optical rotation data have been provided. (c) 2008 Elsevier Ltd. All rights reserved.
Formal total synthesis of (–)- and (+)-balanol: two complementary enantiodivergent routes from vinyloxiranes and vinylaziridines
Formal total syntheses of both enantiomers of balanol have been achieved by the preparation of the protected hexahydroazepine core 2. Two complementary routes have been investigated. The first relied on the regioselective opening of 1,2-epoxycyclohex-3-ene with a chiral-auxiliary version of the Burgess reagent to provide a diastereomeric pair of cis-fused cyclic sulfamidates. The sulfamidates were