作者:Florian Kleinbeck、Gabriela J. Fettes、Lee D. Fader、Erick M. Carreira
DOI:10.1002/chem.201102797
日期:2012.3.19
A convergent synthesis of bafilomycin A1, a potent inhibitor of V‐type ATPases, is presented. The synthesis relies on the zinc triflate mediated diastereoselective addition of a complex enyne to a sensitive aldehyde as the key fragment coupling. A ruthenium‐catalyzed trans‐reduction of the resulting propargylic enyne efficiently installs the required C10–C13 trans,trans‐diene subunit, implementing
介绍了bafilomycin A 1的收敛合成,bafilomycin A 1是V型ATP酶的有效抑制剂。合成依赖于三氟甲磺酸锌介导的复杂烯炔向非对映体的非对映选择性加成,作为关键片段偶联的敏感醛。钌催化的炔丙基炔的反还原可有效地安装所需的C10–C13反式,反式二烯亚单元,从而实现了传统钯催化交叉偶联策略的替代策略。三元醇中仲羟基的高度选择性氧化为合成完成奠定了基础。
Stereocontrolled total synthesis of (+)-concanamycin F: the strategic use of boron-mediated aldol reactions of chiral ketones
作者:Ian Paterson、Victoria A. Steadman neé Doughty、Malcolm D. McLeod、Thomas Trieselmann
DOI:10.1016/j.tet.2011.09.012
日期:2011.12
cross-coupling reaction between the C1–C13 vinyl iodide and C14–C22 vinyl stannane fragments to assemble the (12E,14E)-diene, a modified Yamaguchi macrolactonisation delivered the requisite 18-membered macrocyclic core. This advanced intermediate was also obtained by an alternative sequence using an esterification step to connect the C1–C13 and C14–C22 fragments followed by a Pd-catalysed intramolecular
Stereoselective synthesis of the C1–C13 pentaenoic acid segment (4) of the novel antibiotic incednine (1) is described.
描述了新型抗菌素incednine(1)的C1-C13戊烯酸片段(4)的立体选择性合成。
1,4-Pentenyne as a Five-Carbon Synthon for Efficient and Selective Syntheses of Natural Products Containing 2,4-Dimethyl-1-penten-1,5-ylidene and Related Moieties by Means of Zr-Catalyzed Carboalumination of Alkynes and Alkenes
作者:Gangguo Zhu、Ei-ichi Negishi
DOI:10.1002/chem.200701512
日期:2008.1
Two highly efficient protocols for enantioselective synthesis of 2,4-dimethyl-1-penten-1,5-ylidene derivatives involve the combined use of the Zr-catalyzed methylalumination of alkynes (ZMA) and the Zr-catalyzed asymmetric carboalumination of alkenes (ZACA). The ZMA/ZACA protocol has been applied to the synthesis of a nafuredin intermediate 14 and a potential intermediate 18 for milbemycin beta 3,
Studies in macrolide synthesis: Stereocontrolled synthesis of a C1C13 segment of concanamycin A
作者:Ian Paterson、Malcolm D. McLeod
DOI:10.1016/s0040-4039(97)00816-2
日期:1997.6
The C1C13 segment 6 of concanamycin A (1) was prepared by a highly stereocontrolled route (87% overall ds) in 16 steps from the ester 9. Key steps are the one-pot aldol/reduction, 8→12, and the HWE reaction, 18 + 19→6.
康那霉素A(1)的C 1 = C 13片段6是从酯9出发,通过高度立体控制的路线(总ds的87%)以16步制备的。关键步骤是一锅还原/还原8→12和HWE反应18 + 19→6。