The regioselectivity of the reductive cleavage of 3,4,5-trimethoxybenzyl methyl ether strongly depends on the alkali metal employed as a reducing agent and solvent effects. Reactions run using Na as a reducing agent led to aromatic C(4)-O bond cleavage, whilst reductions run in the presence of Na/15-crown-5, or using Li as a reducing agent, led to highly regioselective benzylic C-O bond cleavage. This regioselectivity turnaround is discussed in terms of major solvent effects affecting the fragmentation paths of a common reaction intermediate. Synthetic applications of these findings led to the synthesis of biologically active compounds, like 2,5-dialkyl-substituted resorcinols, or 1-(3,4,5-trimethoxyphenyl)-2-arylethanes structurally related to combretastatin. (C) 2007 Elsevier Ltd. All rights reserved.
PROCESSES AND HOST CELLS FOR GENOME, PATHWAY, AND BIOMOLECULAR ENGINEERING
申请人:enEvolv, Inc.
公开号:EP3027754A1
公开(公告)日:2016-06-08
US9944925B2
申请人:——
公开号:US9944925B2
公开(公告)日:2018-04-17
[EN] PROCESSES AND HOST CELLS FOR GENOME, PATHWAY, AND BIOMOLECULAR ENGINEERING<br/>[FR] PROCÉDÉS ET CELLULES HÔTES POUR INGÉNIERIE BIOMOLÉCULAIRE, GÉNOMIQUE ET DE LA VOIE
申请人:ENEVOLV INC
公开号:WO2015017866A1
公开(公告)日:2015-02-05
The present disclosure provides compositions and methods for genomic engineering.