Catalytic Asymmetric Aldol Equivalents in the Enantioselective Synthesis of the Apoptolidin C Aglycone
作者:Thomas R. Vargo、James S. Hale、Scott G. Nelson
DOI:10.1002/anie.201004925
日期:2010.11.8
Aldol replacement: Catalyticasymmetric ketene–aldehyde cycloadditions provide surrogates for traditional aldol additions in an enantioselectivesynthesis of apoptolidinone C, the aglycone of the potent apoptosis regulator apoptolidinC. Eight of apoptolidinone C's ten stereocenters derive directly from these catalytic acetate or propionate aldolequivalents.
羟醛替代:催化不对称烯酮-醛环加成在对映选择性合成阿朴烷酮 C(有效凋亡调节剂 apoptolidin C 的苷元)中提供了传统羟醛加成的替代物。阿朴烯酮 C 的 10 个立体中心中有 8 个直接来自这些催化乙酸酯或丙酸醛醇等价物。
Apoptolidinone A: Synthesis of the Apoptolidin A Aglycone
An efficient stereocontrolled synthesis of apoptolidinone A, the aglycone of apoptolidin A is described. The synthetic strategy relies on a cross coupling between C11/C12 of a northern half (C1-C11) and a southern part (C12-C28) followed by a ring-size selective macrolactonization. Key steps for the introduction of the southern half stereocenters are a stereoselective aldol reaction, a substrate controlled
Synthesis and Evaluation of the Cytotoxicity of Apoptolidinones A and D
作者:Victor P. Ghidu、Jingqi Wang、Bin Wu、Qingsong Liu、Aaron Jacobs、Lawrence J. Marnett、Gary A. Sulikowski
DOI:10.1021/jo800545r
日期:2008.7.1
against normal cells. Total syntheses of apoptolidinones A and D are reported. The efficient synthetic strategy leading to the apoptolidinones features construction of the common 20-membered macrolactone by an intramolecular Suzuki reaction and stereocontrolled aldol reactions establishing the C19/C20 and C22/C23 stereocenters. In contrast to apoptolidin A, the aglycones apoptolidinone A and D were shown
凋亡素 AD 是微生物次级代谢产物,对多种癌细胞系具有选择性细胞毒性,而对正常细胞无细胞毒性。报道了凋亡烷酮 A 和 D 的全合成。导致凋亡烷酮的有效合成策略的特点是通过分子内 Suzuki 反应和立体控制羟醛反应构建常见的 20 元大环内酯,从而建立 C19/C20 和 C22/C23 立体中心。与凋亡素 A 相比,当针对人肺癌细胞 (H292) 进行评估时,苷元凋亡素 A 和 D 被证明是非细胞毒性的。
Stereoselective synthesis of the C18–C28 fragment of apoptolidin
作者:Julia Schuppan、Burkhard Ziemer、Ulrich Koert
DOI:10.1016/s0040-4039(99)02134-6
日期:2000.1
An efficient, stereocontrolled synthesis of the C18–C28 segment of apoptolidin has been achieved. Key steps are a stannous triflate-mediated aldol reaction, the acylation of a Weinreb amide with an E-alkenyl lithium reagent and the dihydroxylation of a C19–C20 double bond.