Halichondrin B: Synthesis of the C(1)−C(15) Subunit
作者:Steven D. Burke、Kyung Woon Jung、William T. Lambert、Jeannie R. Phillips、Jason J. Klovning
DOI:10.1021/jo000140r
日期:2000.6.1
A short and efficient synthesis of the C(1)-C(15) subunit of halichondrin B in its natural configuration is described. The polycyclic caged ketal 3, containing nine asymmetric centers, is prepared in 14 steps from alpha-D-glucoheptonic acid gamma-lactone (7). Key steps in the two similar routes described include EtMgBr-promoted pinacol ring expansions of hydroxy mesylates 23 and 34, intramolecular
3, 5, and/or 6 substituted analogues of swainsonine processes for their
申请人:GlycoDesign
公开号:US06048870A1
公开(公告)日:2000-04-11
The invention relates to novel 3, 5, and/or 6 swainsonine analogues, processes for their preparation and their use as therapeutic agents. The invention also relates to pharmaceutical compositions containing the compounds and their use as therapeutics.
Enantioselective Total Synthesis of (−)-Blennolide A
作者:Lutz F. Tietze、Ling Ma、Johannes R. Reiner、Stefan Jackenkroll、Sven Heidemann
DOI:10.1002/chem.201300479
日期:2013.6.24
an enantioselective domino‐Wacker/carbonylation/methoxylation reaction of 7 a with 96 % ee and an enantioselective Wacker oxidation of 7 b with 89 % ee. Further transformations led to the α,β‐unsaturated ester (E)‐17, which was subjected to a highly selective Michael addition, introducing a methyl group to give 18 a. After a threefold oxidation and an intramolecular acylation, the tetrahydroxanthenone
Total synthesis of halichondrins: Enantioselective construction of a homochiral pentacyclic C1-C15 intermediate from d-ribose
作者:Arthur J. Cooper、Robert G. Salomon
DOI:10.1016/s0040-4039(00)97476-8
日期:1990.1
The remarkable heterobicyclization of a homochiral acyclic precursor, derived diastereoselectively from D-ribose, is exploited in a synthesis of the intricate multicyclic polyether C1 to C15 segment of halichondrins.
Novel 3,5,and/or 6 substituted analogues of swainsonine processes for their preparation and their use as therapeutic agents
申请人:GlycoDesign Inc.
公开号:US20030236229A1
公开(公告)日:2003-12-25
The invention relates to novel 3, 5, and/or 6 swainsoninc analogues, processes for their preparation and their use as therapeutic agents. The invention also relates to pharmaceutical compositions containing the compounds and their use as therapeutics.