Palladium-Catalyzed Synthesis of N-tert-Prenylindoles
摘要:
Palladium-catalyzed N-tert-prenylations of indoles, tricarbonylchromium-activated indoles, and indolines that occur In high yields (up to 94%) with high tert-prenyl-to-n-prenyl selectivity (up to 12:1) are reported.
Radical Cyclizations for the Synthesis of Pyrroloindoles: Progress toward the Flinderoles
作者:Joanne E. Curiel Tejeda、Bryan K. Landschoot、Michael A. Kerr
DOI:10.1021/acs.orglett.6b00768
日期:2016.5.6
Under the influence of Lewis acid catalysis, donor/acceptor cyclopropanes underwent nucleophilic ring opening by indolines. The resulting N-alkyl indolines bearing a pendant malonyl moiety oxidatively cyclized to 1,2-pyrroloindoles. This method was showcased by the preparation of the skeletal structure of the flinderoles.
Controlling the regioselectivity of the ring opening of spiro-epoxyoxindoles for efficient synthesis of C(3)–N(1′)-bisindoles and C(3)–N(1′)-diindolylmethane
作者:Saumen Hajra、Subrata Maity、Sayan Roy、Dhiraj Das
DOI:10.1039/c9ob01249d
日期:——
efficient strategy for the construction of both C(3)-N(1') bisindoles and C(3)-N(1') diindolylmethane has been explored via proper tuning of the nucleophilicity of indoline/indole to spiro-epoxyoxindole. Lewis acid-catalyzed highly regio- as well as chemoselective coupling at the C-3 centre of spiro-epoxyoxindoles with indolines furnishes C(3)-N(1') bisindoles whereas base mediated and Lewis acid-catalyzed
Linker nucleoside, and production and use of the same
申请人:Nanogen Recognomics GmbH
公开号:US06699978B1
公开(公告)日:2004-03-02
The present invention relates to a linker nucleoside, its preparation and use for the covalent bonding of biomolecules to oligonucleotides, in particular p-RNA oligonucleotides.
A palladium-catalyzed asymmetric hydrogenation of unprotected 3-substituted indoles was developed, providing a series of 3-substituted indolines in excellent yields with ≤94.4:5.6 er. The large sterically hindered bisphosphine ligand played a crucial role in the enantioselective control. In addition, the gram-scale hydrogenation experiment and product derivatizations were performed successfully.
开发了一种钯催化的未保护的 3-取代吲哚的不对称氢化,以 ≤94.4:5.6 er 的优异收率提供了一系列 3-取代二氢吲哚。大的空间位阻双膦配体在对映选择性控制中起着至关重要的作用。此外,成功地进行了克级加氢实验和产品衍生化。