The synthesis of one of the most potent dual inhibitors of the anti-apoptotic proteins Bcl-xL and Mcl-1 is reported. This analogue of a natural sesquiterpenoid dimer meiogynin A was elaborated by a convergent asymmetric synthesis with 36% yield in ten steps.
The synthesis of a CD ring analogue of aconitine is described. The SmI2-mediated reductive cyclization of an α,β-epoxyketone with a pendant formyl group allowed for stereocontrolled construction of the bicyclo[3.2.1]octane framework. Further oxidative manipulation installed oxygen functionalities with the desired stereochemistry, thus completing the synthesis of the CD ring fragment of aconitine.
Development of an efficient route toward meiogynin A-inspired dual inhibitors of Bcl-xL and Mcl-1 anti-apoptotic proteins
作者:Sandy Desrat、Camille Remeur、Fanny Roussi
DOI:10.1039/c5ob00354g
日期:——
The synthesis, on a large scale, with very good yield and er via an efficient strategy, of a chiral 4-substituted 2-cyclohexenone intermediate, was a milestone in the synthesis of seven analogues of meiogynin A, a natural sesquiterpenoid dimer.
Synthesis of polycyclic cyclobutane derivatives by tandem intramolecular Michael-aldol reaction under two complementary conditions: TBDMSOTf-Et3N and TMSI-(TMS)2NH
the presence of (TMS) 2 NH provided, via a tandem intramolecular Michael-aldol reaction sequence, several different types of cyclobutane derivatives. The two reaction conditions were complementary. Tricyclo[4.2.1.03-8]nonanes 34 and 35, tricyclo[5.1.1.0 3,8 ]nonane 40, tricyclo[5.4.0.0 3,7 ]undecane 51, tetracyclo[5.4.0.0 3,7 .0 9,11 ]undecane 45, and the bicyclo[3.2.0]heptanes 36, 57, and 38, which
通过串联的分子内迈克尔-羟醛反应序列,在 Et 3 N 存在下用 TBDMSOTf 或在 (TMS) 2 NH 存在下用 TMSI 处理在适当位置具有酮官能团的 α,β-不饱和酯,几种不同类型的环丁烷衍生物。这两种反应条件是互补的。三环[4.2.1.03-8]壬烷34和35、三环[5.1.1.0 3,8 ]壬烷40、三环[5.4.0.0 3,7 ]十一烷51、四环[5.4.0.0 3,7 .0 9,11 ]十一烷 45 和双环 [3.2.0] 庚烷 36、57 和 38,它们的结构部分或完全类似于端茚酸 A (1a)、B (1b) 和 C (2)、三羟基癸二烯(3)、lintenone (4)、italicene (3) 和 filifolone (6),通过串联反应立体选择性地合成