A Formal Total Synthesis of Dysiherbaine and Neodysiherbaine A
作者:Hee-Yoon Lee、Sang-Shin Lee、Hoon Seok Kim、Kang Mun Lee
DOI:10.1002/ejoc.201200439
日期:2012.8
yclo[2.2.1]hept-5-enes 7 produced the fused bis(oxacyclic) structure for dysiherbaine and neodysiherbaine A (i.e., 6b) with the complete control of the relative stereochemistry at the quaternary carbon center and the ring junction of the dysiherbaine core skeleton. A formaltotalsynthesis of dysiherbaine and neodysiherbaine A was achieved from 6b.
1-烷基-3-(烯丙氧基)-7-oxabicyclo[2.2.1]hept-5-enes 7 的多米诺烯烃复分解反应产生了双(氧杂环) 结构的双(氧杂环) 结构,用于dysiherbaine 和neodysiherbaine A (即,6b)完全控制季碳中心和dysiherbaine核心骨架的环连接处的相对立体化学。从 6b 中实现了dysiherbaine 和neodysiherbaine A 的正式全合成。
Discovery of Novel Muscarinic Receptor Modulators by Integrating a Natural Product Framework and a Bioactive Molecule
Muscarinic acetylcholine receptors (mAChRs) are important therapeutic targets for several diseases of the centralnervoussystem and periphery. However, the lack of subtype‐selective ligands for these receptors is a major challenge. A novel approach involving the integration of a natural product framework with a bioactive molecule (iNPBM) by using gephyrotoxin and the isoindoline framework is demonstrated
Desymmetrization of meso 7-aza-2,3-bis(phenylsulfonyl) bicyclo[2.2.1]hept-2-ene: a re-examination. Kinetic resolution of racemic 3-arylsulfonyl-7-aza-2-bromobicyclo[2.2.1]hepta-2,5-dienes
作者:Sergio Cossu、Paola Peluso
DOI:10.1016/j.tetlet.2006.04.014
日期:2006.6
The inexpensive large scale preparation of N-methoxycarbonyl-7-aza-2,3-bis(phenylsulfonyl)bicyclo[2.2.1]hept-2-ene and the re-examination of its stereoselective desymmetrization are reported. Moreover, the kinetic resolution of N-protected 3-arylsulfonyl-7-aza-2-bromobicyclo[2.2.1]hepta-2,5-dienes promoted by (R,R)-hydrobenzoin is described, representing a new tool to fix the absolute stereochemistry
2-Bromoethynyl aryl sulfones as versatile dienophiles: a formal synthesis of epibatidine
作者:Chunming Zhang、Charles J. Ballay II、Mark L. Trudell
DOI:10.1039/a900970a
日期:——
A facile synthesis of 2-bromoethynyl aryl sulfones has been developed; the reactivity of these versatile dienophiles in [4+2] cycloaddition reactions as well as application in a formal synthesis of epibatidine is described.