Construction of key building blocks towards the synthesis of cortistatins
作者:Satrajit Indu、Rahul D. Telore、Krishna P. Kaliappan
DOI:10.1039/d0ob00170h
日期:——
the construction of key building blocks towards the synthesis of cortistatins; a family of steroidal alkaloids. Cortistatin A, being a primary target due to its superior biological properties over other congeners, has been prepared by two different synthetic routes. Synthesis of the precursor to the heavily substituted A-ring starting fromD-glucose and construction of the DE-ring junction employing
A One-Pot, Copper-Catalyzed Cascade Route to 2-Indolyl-C-glycosides
作者:Parthasarathi Subramanian、Krishna P. Kaliappan
DOI:10.1002/ejoc.201201208
日期:2013.1
An efficient and high-yielding, one-pot, Cu-catalyzed synthesis of 2-indolyl-C-glycosides is delineated. The sequence involves a cascade Sonogashira type coupling and a hydroamination reaction between sugar-derived alkynes and N-tosyl-o-iodoaniline followed by removal of the N-tosyl group to provide a library of 2-indolyl-C-glycosides in moderate to excellent yields.
描述了一种高效且高产的单锅 Cu 催化合成 2-吲哚基-C-糖苷。该序列涉及级联 Sonogashira 型偶联和糖衍生的炔烃和 N-甲苯磺酰基-邻碘苯胺之间的加氢胺化反应,然后去除 N-甲苯磺酰基,以提供中等至优异的 2-吲哚基-C-糖苷库产量。
Pd(II)-Mediated Alkynediol Spiroketalization: First Total Synthesis of (−)-Cephalosporolide E and (+)-Cephalosporolide F
作者:C. V. Ramana、Sharad B. Suryawanshi、Rajesh G. Gonnade
DOI:10.1021/jo802539z
日期:2009.4.3
Herein we describe a concise assembly of the central 1,6-dioxaspiro[4.4]nonane core of cephalosporolides E/F by employing a Pd-mediated alkynediol cycloisomerization and their total synthesis. On the basis of spectroscopic data and optical rotation values, the absolute configurations of cephalosporolides E/F were proposed.
The [Pd]-catalyzed domino process comprising of the coupling of alkynes and o-iodophenol and the subsequent cyclization leading to benzofurans has been successfully applied on the sugar and nucleoside derived alkynes. (C) 2013 Elsevier Ltd. All rights reserved.