Multistep Synthesis of Complex Boronic Acids from Simple MIDA Boronates
作者:Eric P. Gillis、Martin D. Burke
DOI:10.1021/ja8063759
日期:2008.10.29
it is typically necessary to introduce the boronic acid functional group just prior to its utilization. Overcoming this important limitation, we herein report that air- and chromatographically stable MIDA boronates are compatible with a wide range of common reagents which enables the multistep synthesis of complex boronic acid building blocks from simple B-containing starting materials. X-ray and variable
由于其对大多数合成试剂的敏感性,通常需要在使用之前引入硼酸官能团。克服了这一重要限制,我们在此报道空气和色谱稳定的 MIDA 硼酸盐与多种常用试剂兼容,这使得能够从简单的含 B 起始材料多步合成复杂的硼酸结构单元。X 射线和变温 NMR 研究将 MIDA 硼酸盐的独特稳定性与潜在反应性硼 p 轨道和/或氮孤对电子的动力学不可接近性联系起来。这些发现被共同利用,通过结构复杂的 MIDA 保护的卤代硼酸构件的迭代交叉偶联,实现了 (+)-crocacin C 的短程模块化全合成。
Total Synthesis of (+)-Crocacin D
作者:Luiz C. Dias、Luciana G. de Oliveira、Janaína D. Vilcachagua、Florian Nigsch
DOI:10.1021/jo047732k
日期:2005.3.1
The total synthesis of (+)-crocacin D is described. The convergent asymmetric synthesis relies on the use of a Stille cross-coupling between an (E)-vinyl stannane with an (E)-vinyl iodide to establish the (E,E)-dienamide moiety followed by a mild and efficient copper-catalyzed coupling between (+)-crocacin C and a (Z)-vinyl iodide to establish the challenging (Z)-enamide function.
Step-Economic Synthesis of (+)-Crocacin C: A Concise Crotylboronation/[3,3]-Sigmatropic Rearrangement Approach
作者:Adele E. Pasqua、Frank D. Ferrari、Chris Hamman、Yanzhou Liu、James J. Crawford、Rodolfo Marquez
DOI:10.1021/jo301210f
日期:2012.8.17
The step-economic total synthesis of (+)-crocacin C has been achieved in 20% yield from commercially available starting materials. This approach requires the isolation of only 8 intermediates and can provide a reliable supply of (+)-crocacin C for the development of new antifungal and crop protection agents.
Total Synthesis of (+)-Crocacin C
作者:Luiz C. Dias、Luciana G. de Oliveira
DOI:10.1021/ol016845c
日期:2001.11.1
[GRAPHICS]The total synthesis of (+)-crocacin C is described. The convergent asymmetric synthesis relies on the use of a regio- and diastereoselective epoxidation of an allylic alcohol with m-CPBA followed by epoxide opening with Me2CuCNLi2 and a Stille cross-coupling between E-vinyl stannane 5 and E-vinyl iodide 6 to establish the (E,E)-dienamide moiety.
Stereocontrolled synthesis of calyculin A: construction of the C(1)–C(14) tetraene nitrile unit
作者:Anthony G. M. Barrett、Jeremy J. Edmunds、James A. Hendrix、Kiyoshi Horita、Christopher J. Parkinson
DOI:10.1039/c39920001238
日期:——
An enantioselective and geometrically selective synthesis of the C(1)âC(14) tetraene nitrile unit of calyculin A, using aldol chemistry with (+)-(E)-diisopinocampheylborane and Stille coupling, is described.