α-chlorovinylation: Synthesis of 2-chloropropenyl and propargyl alcohols
摘要:
Formal alpha-chlorovinylation of aldehydes using CH3CCl3/CrCl2 affords 2-chloropropenyl alcohols from which terminal propargyl alcohols are obtained via base Induced elimination. (C) 1999 Elsevier Science Ltd. All rights reserved.
Ruthenium-Catalyzed Cascade Annulation of Indole with Propargyl Alcohols
作者:Julia Kaufmann、Elisabeth Jäckel、Edgar Haak
DOI:10.1002/anie.201801846
日期:2018.5.14
Cascade transformations forming multiple bonds and one‐pot procedures provide rapid access to natural‐product‐like scaffolds from simple precursors. These atom‐economic processes are valuable tools in organic synthesis and drug discovery. Herein, we report on ruthenium‐catalyzed cascade annulations of indole with readily available propargylalcohols. These provide rapid access to diverse carbazoles
形成多个键和一锅法的级联转化提供了从简单前体中快速获得天然产物样支架的途径。这些原子经济过程是有机合成和药物发现中的宝贵工具。本文中,我们报道了钌与容易获得的炔丙醇的级联环空反应。这些提供了快速接近各种咔唑,环庚[ b ]吲哚和其他具有高选择性的稠合多环的途径。具有氧化还原偶联的环戊二烯酮配体的双功能钌配合物可作为不同级联过程的常用催化剂。
Synthesis and Cytotoxic Activity of a Series of Diacetylenic Compounds Related to Falcarindiol.
作者:William N. SETZER、Xuyuan GU、Eric B. WELLS、Mary C. SETZER、Debra M. MORIARITY
DOI:10.1248/cpb.48.1776
日期:——
The synthesis of a series of diacetylenic compoundsrelated to the natural product falcarindiol has been carried out. Unsymmetrical diacetylenes were prepared by a modification of the Cadiot-Chodkiewicz coupling reaction, while a Glaser coupling was used to prepare symmetrical diacetylenes. These compounds have been tested for in vitro cytotoxic activity against Hep-G2, and H-4-II-E cell lines. Diacetylenes
Synthesis of Chiral 3-Substituted Phthalides via Rhodium(I)-catalyzed Crossed Alkyne Cyclotrimerisation
作者:Bernhard Witulski、Axel Zimmermann
DOI:10.1055/s-2002-34883
日期:——
3-Substituted phthalides were synthesized for the first time by crossed alkyne cyclotrimerisations with Wilkinson’s catalyst. Esterification of propiolic acids with chiral propargylic alcohols by either the DCC/DMAP or the Mitsunobu method allows the synthesis of either enantiomeric form of diyne esters, that are used in crossed alkyne cyclotrimerisations with acetylene to provide 3-substituted phthalides in both enantiomeric forms.