Process for killing internal helminths using certain
申请人:ICI Australia Limited
公开号:US04251546A1
公开(公告)日:1981-02-17
A method for killing internal parasites of warm blooded animals by treating the animals with an effective amount of a composition comprising a bis-(2-hydroxy-3-nitrophenyl)methane derivative; and novel bis(2-hydroxy-3-nitrophenyl)methane derivatives.
CuBr2-catalyzed alkylation of furans with benzyl alcohols and benzaldehydes. Domino reactions including this alkylation as a key step
作者:Anton S. Makarov、Anna E. Kekhvaeva、Christopher J.J. Hall、Daniel R. Price、Igor V. Trushkov、Maxim G. Uchuskin
DOI:10.1016/j.tet.2017.10.054
日期:2017.12
CuBr2-catalyzed alkylation of furans with a broad scope of benzyl alcohols and benzaldehydes is reported. Reaction proceeds efficiently under mild reaction conditions requiring no inert atmosphere or other precautions. Moreover, it is shown that CuBr2 catalyzes domino reactions of furans with benzyl alcohols or benzaldehydes bearing a nucleophilic moiety in the ortho-position. These protocols offer a
A Simple Synthesis of Densely Substituted Benzofurans by Domino Reaction of 2-Hydroxybenzyl Alcohols with 2-Substituted Furans
作者:Anton S. Makarov、Anna E. Kekhvaeva、Petrakis N. Chalikidi、Vladimir T. Abaev、Igor V. Trushkov、Maxim G. Uchuskin
DOI:10.1055/s-0039-1690000
日期:2019.10
Brönsted acid-catalyzed cascade synthesis of densely substituted benzofurans from easily available salicyl alcohols and biomass-derived furans has been developed. The disclosed sequence includes the intermediate formation of 2-(2-hydroxybenzyl)furans that quickly rearrange into functionalized benzofurans. The established protocol was applied for the total synthesis of sugikurojinol B. The Brönsted
A Michael addition initiated cyclopropanation/[1,5]-hydrogen shift has been developed for the enantioselective synthesis of Rauhut–Currier products. The reaction of α-alkyl diazoesters and in situ generated o-quinone methides proceeds in the presence of chiral oxazaborolidinium ion, providing Z-stereocontrolled Rauhut–Currier products in high yields (up to 96%) with excellent Z/E selectivities (>20:1)
Enantioselective Friedel–Crafts Alkylation of Furans with <i>o</i>-Quinone Methide Using a Chiral Oxazaborolidinium Ion Catalyst
作者:Yoon Sung Cho、Seung Tae Kim、Do Hyun Ryu
DOI:10.1021/acs.orglett.2c00404
日期:2022.3.4
A chiral Lewis acid-catalyzed enantioselectiveFriedel–Craftsfuranalkylation with in situ-generated o-quinone methides has been developed. In the presence of a chiral oxazaborolidinium ion catalyst, the reaction proceeded in high yield (up to 99%) with excellent enantioselectivity (up to >99% ee).