Total Synthesis of Chloptosin, a Potent Apoptosis-Inducing Cyclopeptide
作者:Shun-Ming Yu、Wen-Xu Hong、Yuan Wu、Chun-Long Zhong、Zhu-Jun Yao
DOI:10.1021/ol100135a
日期:2010.3.5
A bidirectional totalsynthesis of chloptosin has been achieved in 16 operations (32 individual reactions) and 3% overall yield from the readily available materials. Palladium-catalyzed tryptophan synthesis, diastereoselective selenocyclization and oxidative deselenation successfully served as key steps in construction of the dimeric core amino acid. 2-Bromo-1-ethyl pyridinium tetrafluoroborate was
作者:Alexander J. Oelke、David J. France、Tatjana Hofmann、Georg Wuitschik、Steven V. Ley
DOI:10.1002/anie.201002880
日期:2010.8.16
one: A new organocatalytic route for the asymmetric preparation of the embedded piperazic acids and a Stille coupling of an ortho‐chloropyrroloindole served as key steps in the totalsynthesis of the dimeric cyclopeptide chloptosin (see structure).
Total Synthesis of Chloptosin: A Dimeric Cyclohexapeptide
作者:Alexander J. Oelke、Francesca Antonietti、Leonardo Bertone、Philippa B. Cranwell、David J. France、Rebecca J. M. Goss、Tatjana Hofmann、Stephan Knauer、Steven J. Moss、Paul C. Skelton、Richard M. Turner、Georg Wuitschik、Steven V. Ley
DOI:10.1002/chem.201003216
日期:2011.4.4
Here we describe in full our investigations into the synthesis of the dimeric cyclohexapeptide chloptosin in 17 linear steps. Particularly, this work features an organocatalytic tandem process for the synthesis of the embedded piperazic acids, in which a differentially protected azodicarboxylate is used together with pyrrolidinyl tetrazole as the catalyst. The central biaryl bond is being formed by