PROCESS AND INTERMEDIATES FOR MAKING TUBULYSIN ANALOGS
申请人:BRISTOL-MYERS SQUIBB COMPANY
公开号:US20170362259A1
公开(公告)日:2017-12-21
An improved process for making a compound B of the structure
wherein n, R
1
, R
2
, and R
3
are as defined in the specification. Compound B can be used to make tubulysin analogs that are, in turn, useful as anti-cancer agents, particularly when deployed in an antibody-drug conjugate.
A Straightforward Approach towards Cyclic Photoactivatable Tubulysin Derivatives
作者:Judith Hoffmann、Uli Kazmaier
DOI:10.1002/anie.201405650
日期:2014.10.13
synthesis of cyclicphotoactivatable natural products. Cyclization occurs between the allyl moiety in the protecting group and a second double bond in the target molecule by means of ring‐closing metathesis. Cyclization should increase the metabolic stability towards proteases. On the other hand, the conformational change should cause diminished biological activity. As illustrated for tubulysin derivatives
Tubulysin V has been enantioselectively synthesized from the units of dipeptide 23, Tuv and Tup. The features of this synthetic strategy is included three portions, the Tuv fragment 17 was diastereoselectively synthesized from the d-malic acid, the stereocenters of the Tup unit was constructed by the asymmetric reduction as well as methylation, and the epimerization for several known methods was successfully