Chemoenzymatic total synthesis of potent HIV RNase H inhibitor (−)-1,3,4,5-tetragalloylapiitol
摘要:
Starting from racemic dimethyl 2-acetoxy-3-methylenesuccinate, the chemoenzymatic facile total synthesis of (-)-1,3,4,5-tetragalloylapiitol has been demonstrated via an efficient lipase catalyzed resolution followed by a DIBAL reduction-double gallyolation, osmium tetroxide dihydroxylation-double gallyolation, and reductive global O-benzyl deprotection pathway. (C) 2010 Elsevier Ltd. All rights reserved.
employing an addition reaction in tandem with a hydrogen-transferreaction for the elaboration of C-glycoside-based sialyl Lewis X (sLe(X)) analogues. Significant stereocontrol was noted when alkyl radicals were reacted with a series of alkoxytaconates. Transitionstates were proposed to explain the obtained selectivity. Further reaction between an anomeric-centered fucosyl-derived radical and a galactosylated
Chemoenzymatic total synthesis of potent HIV RNase H inhibitor (−)-1,3,4,5-tetragalloylapiitol
作者:Ramesh U. Batwal、Ramesh M. Patel、Narshinha P. Argade
DOI:10.1016/j.tetasy.2010.11.032
日期:2011.1
Starting from racemic dimethyl 2-acetoxy-3-methylenesuccinate, the chemoenzymatic facile total synthesis of (-)-1,3,4,5-tetragalloylapiitol has been demonstrated via an efficient lipase catalyzed resolution followed by a DIBAL reduction-double gallyolation, osmium tetroxide dihydroxylation-double gallyolation, and reductive global O-benzyl deprotection pathway. (C) 2010 Elsevier Ltd. All rights reserved.