Total syntheses of oxygenated brazanquinones via regioselective homologous anionic Fries rearrangement of benzylic O-carbamates.
Using new variations of anionic aromatic chemistry, the total synthesis of oxygenated brazanquinones (1a-1c), derived from beta-brasan, a natural product isolated from Caesalpina echinata, via carbamates 2a-2c is described.
Slana
Glaucia Barbosa Candido Alves
GB
Instituto de Química, Universidade Federal do Rio de Janeiro, CT, Bl A/508, 21949-900 Rio de Janeiro - RJ, Brazil. glaucia@gmx.net
de Azevedo
Mariângela Soares
MS
Lopes
Rosângela Sabattini Capella
RS
Lopes
Cláudio Cerqueira
CC
Cardoso
Jari Nobrega
JN