Combining Zn ion catalysis with homogeneous gold catalysis: an efficient annulation approach to N-protected indoles
作者:Yanzhao Wang、Lianzhu Liu、Liming Zhang
DOI:10.1039/c2sc21333h
日期:——
The Fischer indole synthesis is perhaps the most powerful method for indole preparation, but it often suffers from low regioselectivities with unsymmetric aliphatic ketone substrates and strong acidic conditions and is not suitable for alpha,beta-unsaturated ketones. In this article, we disclose an efficient synthesis of N-protected indoles from N-arylhydroxamic acids/N-aryl-N-hydroxycarbamates and
Stereoretentive and regioselective selenium-catalyzed intermolecular propargylic C–H amination of alkynes
作者:T. Parker Maloney、Alexander F. Dohoda、Alec C. Zhu、Forrest E. Michael
DOI:10.1039/d1sc07067c
日期:——
we report an intermolecular propargylic C–H amination of alkynes. This reaction is operationally convenient and requires no transition metal catalysts or additives. Terminal, silyl, and internalalkynes bearing a wide range of functional groups can be aminated in high yields. The regioselectivity of amination for unsymmetrical internalalkynes is strongly influenced by substitution pattern (tertiary
Stereoselective Reduction of Conjugated and Non-conjugated Triple Bonds in Attractant Precursors with Zn Activated by Cu: A Designed Approach to the Synthesis of Conjugated Dienic Pheromones
作者:Jacek Grodner
DOI:10.1055/s-0042-1751573
日期:——
A simple, highly stereoselective, and efficient method to obtain important attractants by the reduction of the triple bond in several E-enynes and hex-3-ynyl acetate by an activated Zn-Cu system is described. The stereoselectivity of the semireduction for the generation of a new (Z)-C=C bond was >98%. The substrates for the reduction reaction were obtained by new synthetic routes with an overall yield
描述了一种简单、高度立体选择性且有效的方法,通过活化的 Zn-Cu 体系还原几个E-烯炔和乙酸己-3-炔酯中的三键来获得重要的引诱剂。半还原生成新的 ( Z )-C=C 键的立体选择性>98%。通过新的合成路线获得了还原反应的底物,总收率超过40%。
Highly Enantioselective Propargylic Hydroxylations Catalyzed by Chloroperoxidase
作者:Shanghui Hu、Lowell P. Hager
DOI:10.1021/ja983612g
日期:1999.2.1
TICK TRAP AND METHOD OF TRAPPING TICKS
申请人:TICK TRAPPER INC.
公开号:US20190327952A1
公开(公告)日:2019-10-31
Provided is a tick trap having a glue constructed to trap ticks touching the glue by sticking to the ticks, and a plant based scent that attracts ticks to the glue, and a method of trapping ticks using the tick trap. The tick trap can be used to trap ticks within a dwelling or in the environment.