Highly Efficient Synthesis of Isoquinolines via Nickel-Catalyzed Annulation of 2-Iodobenzaldimines with Alkynes: Evidence for Dual Pathways of Alkyne Insertion
作者:Rajendra Prasad Korivi、Chien-Hong Cheng
DOI:10.1021/ol0519994
日期:2005.11.1
[reaction: see text] A wide range of substituted isoquinolines were synthesized via a highly efficient nickel-catalyzed annulation of the tert-butyl imines of 2-iodobenzaldehydes and various alkynes; examination of the regiochemistry of isoquinolines synthesized indicates that there are two different alkyne insertion pathways for the catalytic reactions.
The air‐stable and inexpensive Ni(dppe)Cl2 along with Et3N efficiently catalyzes the iminoannulation of alkynes at room temperature, allowing for the preparation of important 3,4‐disubstituted and 3‐substituted isoquinolines in high yields with complete regioselectivity. These annulation reactions feature a broad substrate scope, easy scalability, operational simplicity, and excellent practicality
Primary Amines as Directing Groups in the Ru-Catalyzed Synthesis of Isoquinolines, Benzoisoquinolines, and Thienopyridines
作者:Pedro Villuendas、Esteban P. Urriolabeitia
DOI:10.1021/jo400344m
日期:2013.6.7
Isoquinolines, benzoisoquinolines, thieno[3,2-c]pyridines and fused heteroaryl[2,3-c] pyridines, with a wide variety of substituents at different positions of the aromatic or heteroaromatic rings, have been synthesized by Ru-catalyzed oxidative coupling of a broad range of benzylamines or heterocycles with internal alkynes. All benzylamines and heterocycles have unprotected primary amines as efficient directing groups.
Opiate analogs selective for the delta-opioid receptor
申请人:Welsh J. William
公开号:US20070105884A1
公开(公告)日:2007-05-10
Novel compounds which selectively bind to the δ-opioid receptor have been designed. These compounds have greater selectivity, improved water (blood) solubility, and enhanced therapeutic value as analgesics. Because agonists with selectivity for the δ-opioid receptor have shown promise in providing enhanced analgesis without the addictive properties, the compounds of the present invention are better than morphine, naltrindole (NTI), spiroindanyloxymorphone (SIOM), and other known μ-opioid receptor selectors as analgesics.