A Gold(I)-Catalyzed Hydroamination/Cycloisomerization Cascade: Concise Synthesis of (±)-seco-Antofine and (±)-Septicine
作者:Guilong Tian、Liangliang Song、Zhenghua Li、Koen Robeyns、Luc Van Meervelt、Erik V. Van der Eycken
DOI:10.1021/acs.orglett.0c03062
日期:2020.11.6
procedure for the synthesis of highly functionalized N-heterocyclic 1,6-annulated 2-pyridones and 2,3-annulated 4-pyrimidinones has been elaborated through a gold-catalyzed tandem hydroamination/cycloisomerization cascade. This novel and highly efficient method allows the rapid construction of these diverse N-heterocyclic scaffolds starting from readily available building blocks, and shows a wide scope
Synthesis of Pyrrolo[1,2-<i>b</i>]isoquinolines via Gold(I)-Catalyzed Cyclization/Enyne Cycloisomerization/1,2-Migration Cascade
作者:Liangliang Song、Guilong Tian、Luc Van Meervelt、Erik V. Van der Eycken
DOI:10.1021/acs.orglett.0c02310
日期:2020.8.21
of the migrating group is comprehensively investigated. The study of the mechanism indicates that the pathway involving a gold carbenoid species is the main pathway and that the 1,2-migration of alkyl and aryl groups to the gold carbenoid occurs in an intramolecular fashion. This cascade reaction is also employed as the key step for the synthesis of a decumbenine B analogue.
Abstract Indoles, dihydroisoquinolines, and dihydroquinolines were efficiently prepared by ruthenium-catalyzed heterocyclizations of aromatic homo- and bis-homopropargyl amines/amides in the presence of an amine/ammonium base-acid pair. These regioselective 5-endo and 6-endo cyclizations most probably occur by nucleophilic trapping of key ruthenium-vinylidene intermediates. Indoles, dihydroisoquinolines
Ruthenium-Catalyzed Cycloisomerization of Aromatic Homo- and Bis-Homopropargylic Amines/Amides: Formation of Indoles, Dihydroisoquinolines and Dihydroquinolines
作者:Alejandro Varela-Fernández、Jesús A. Varela、Carlos Saá
DOI:10.1002/adsc.201100095
日期:2011.8
Ruthenium-catalyzed cycloisomerizations of aromatic homo- and bis-homopropargylic amines/amides efficiently afford indoles, dihydroisoquinolines and dihydroquinolines. These processes were regioselective (5- and 6-endo cyclizations) on using key Ru vinylidene intermediates. The presence of an amine/ammonium base-acid pair increased the rate of cyclization and facilitated the catalytic turnover.
Gegenstand der vorliegenden Erfindung sind neue CGRP-Antagonisten der allgemeinen Formel I
in der U, V, X, Y, R1, R2 und R3 wie nachstehend erwähnt definiert sind, deren Tautomere, deren Isomere, deren Diastereomere, deren Enantiomere, deren Hydrate, deren Gemische und deren Salze sowie die Hydrate der Salze, insbesondere deren physiologisch verträgliche Salze mit anorganischen oder organischen Säuren oder Basen, diese Verbindungen enthaltende Arzneimittel, deren Verwendung und Verfahren zu ihrer Herstellung.
本发明涉及通式 I 的新型 CGRP 拮抗剂
中 U、V、X、Y、R1、R2 和 R3 的定义、它们的同分异构体、异构体、非对映异构体、对映体、它们的水合物、它们的混合物和它们的盐以及盐的水合物,特别是它们与无机或有机酸或碱的生理相容盐、含有这些化合物的药物、它们的用途和它们的制备工艺。