Identifying the targets of bioactivesmallmolecules is a challenging endeavor for which no general solution currently exists. Classical affinity purification experiments suffer from the need to functionalise a bioactive compound and link it to a solid support, which may interfere with target binding. A modern mass spectrometry-based proteomics technique that has partially circumvented this problem
(−)-Lytophilippine A: Synthesis of a C1−C18 Building Block
作者:Annika Gille、Martin Hiersemann
DOI:10.1021/ol1023008
日期:2010.11.19
The convergent enantioselective synthesis of a protected C1-C18 building block for the total synthesis of (-)-lytophilippine A was achieved. A catalytic asymmetric Gosteli-Claisen rearrangement and an Evans aldol reaction served as key C/C-connecting transformations during the assembling of the C1-C7 subunit (10 steps from 4, 29%). The synthesis of the C8-C18 segment was achieved utilizing D-galactose as inexpensive ex-chiral-pool starting material (15 steps, 15%). The merger of the subunits was accomplished by a remarkably efficient sequence consisting of esterification and ring-closing metathesis (five steps, 56%).
Asymmetric alkylation reactions of chiral imide enolates. A practical approach to the enantioselective synthesis of .alpha.-substituted carboxylic acid derivatives
作者:D. A. Evans、M. D. Ennis、D. J. Mathre
DOI:10.1021/ja00370a050
日期:1982.3
Preparation of Nonracemic 3,5-Disubstituted-.gamma.-butyrolactones: An Effective Sequent Auxiliary for Amide Alkylation and Iodolactonization
作者:Hongsik Moon、Shawn W. E. Eisenberg、Mark E. Wilson、Neil E. Schore、Mark J. Kurth
DOI:10.1021/jo00101a002
日期:1994.11
The effective dual use of a chiral auxiliary in two sequential steps is reported; this sequent auxiliary mediates diastereoselective C-C bond formation in the first step and mediates diastereoselective heterocyclization in the second step.