The sterically congested 1,2,3-substituted 3'-dealkyl mumbaistatin derivatives 16, 20, and 21 were prepared for the first time by base-catalyzed cyclization of the 2,3-bis-substituted naphthoquinone precursor 11 followed by bromine mediated photooxidation and methyl ether cleavage. (c) 2005 Elsevier Ltd. All rights reserved.
The sterically congested 1,2,3-substituted 3'-dealkyl mumbaistatin derivatives 16, 20, and 21 were prepared for the first time by base-catalyzed cyclization of the 2,3-bis-substituted naphthoquinone precursor 11 followed by bromine mediated photooxidation and methyl ether cleavage. (c) 2005 Elsevier Ltd. All rights reserved.
The sterically congested 1,2,3-substituted 3'-dealkyl mumbaistatin derivatives 16, 20, and 21 were prepared for the first time by base-catalyzed cyclization of the 2,3-bis-substituted naphthoquinone precursor 11 followed by bromine mediated photooxidation and methyl ether cleavage. (c) 2005 Elsevier Ltd. All rights reserved.