Synthesis studies directed toward gelsemine. A new synthesis of highly functionalized cis-hydroisoquinolines
作者:William G. Earley、E.Jon Jacobsen、G. Patrick Meier、Taeboem Oh、Larry E. Overman
DOI:10.1016/s0040-4039(00)82113-9
日期:1988.1
Cis-Hydroisoquinolines can be prepared in good yields by treatment of readily available endo-1-(cyanomethyl)-6-hydroxybicyclo [2.2.2]oct-5-en-1-yl amines with KH as summarized in Scheme 3.
Diastereoselective Construction of Fused Carbocyclic Pyrrolidines via a Copper-Catalyzed [3 + 2] Cycloaddition: Total Syntheses of Pancratinines B–C
作者:Fang Wang、Xiaohan Xu、Yangtian Yan、Jiayang Zhang、Wen-Ju Bai、Jianwei Chen、Yang Yang
DOI:10.1021/acs.orglett.3c02310
日期:2023.9.22
A Cu-catalyzed diastereoselective [3 + 2] cycloaddition of 2-arylaziridines and cyclic silyl dienol ethers was developed to efficiently construct fused-[5,n] carbocyclic pyrrolidines, which are widespread in bioactive natural products. Mechanistic studies revealed that the high diastereoselectivity of this transformation arose from a sequential retro aza-Michael/epimerization/aza-Michael process. Taking
开发了铜催化的2-芳基氮丙啶和环状甲硅烷基二烯醇醚的非对映选择性[3 + 2]环加成反应,以有效构建稠合-[5, n ]碳环吡咯烷,该化合物广泛存在于生物活性天然产物中。机理研究表明,这种转化的高非对映选择性源于连续的逆向氮杂迈克尔/差向异构化/氮杂迈克尔过程。利用这种新开发的方法,首次实现了 pancratinines B 和 C 的全合成。
DEVINE, PAUL N.;OH, TAEBOEM, J. ORG. CHEM., 56,(1991) N, C. 1955-1958
作者:DEVINE, PAUL N.、OH, TAEBOEM
DOI:——
日期:——
EARLEY, WILLIAM G.;JACOBSEN, E. JON;MEIER, G. PATRICK;OH, TAEBOEM;OVERMAN+, TETRAHEDRON LETT., 29,(1988) N 31, C. 3781-3784
作者:EARLEY, WILLIAM G.、JACOBSEN, E. JON、MEIER, G. PATRICK、OH, TAEBOEM、OVERMAN+
DOI:——
日期:——
Aza-Cope Rearrangement−Mannich Cyclizations for the Formation of Complex Tricyclic Amines: Stereocontrolled Total Synthesis of (±)-Gelsemine
作者:William G. Earley、Jon E. Jacobsen、Andrew Madin、G. Patrick Meier、Christopher J. O'Donnell、Taeboem Oh、David W. Old、Larry E. Overman、Matthew J. Sharp
DOI:10.1021/ja055710p
日期:2005.12.1
gelsemine. Using a sequential base-promoted oxy-aza-Cope rearrangement/Mannich cyclization sequence, gram quantities of azatricyclo[4.4.0.0(2,8)]decanone 18, a central intermediate in our total of (+/-)-gelsemine, were prepared from 3-methylanisole in 12 steps and 16% overall yield.