Copper‐Catalyzed Aza‐Sonogashira Cross‐Coupling To Form Ynimines: Development and Application to the Synthesis of Heterocycles
摘要:
AbstractNitrogen‐substituted alkynes, such as ynamines and ynamides, are versatile synthetic building blocks. Ynimines bearing additional nucleophilic and electrophilic centers relative to ynamines and ynamides are expected to have high synthetic potential. However, their chemical reactivity remains unexplored owing mainly to the lack of synthetic accessibility. We report herein a versatile copper‐catalyzed synthesis of ynimines from readily available O‐acetyl ketoximes and terminal alkynes. A wide range of O‐acetyl ketoximes derived from diaryl ketones, aryl alkyl ketones and dialkyl ketones underwent cross‐coupling with a diverse set of terminal alkynes to afford the ynimines in good to excellent yields. An unprecedented [5+1] heteroannulation reaction exploiting the reactivity of the ynimine generated in situ was subsequently developed for the synthesis of medicinally important heterocycles, including isoquinolines, azaindoles, azabenzofurans, azabenzothiophenes and carbolines.
Copper‐Catalyzed Aza‐Sonogashira Cross‐Coupling To Form Ynimines: Development and Application to the Synthesis of Heterocycles
摘要:
AbstractNitrogen‐substituted alkynes, such as ynamines and ynamides, are versatile synthetic building blocks. Ynimines bearing additional nucleophilic and electrophilic centers relative to ynamines and ynamides are expected to have high synthetic potential. However, their chemical reactivity remains unexplored owing mainly to the lack of synthetic accessibility. We report herein a versatile copper‐catalyzed synthesis of ynimines from readily available O‐acetyl ketoximes and terminal alkynes. A wide range of O‐acetyl ketoximes derived from diaryl ketones, aryl alkyl ketones and dialkyl ketones underwent cross‐coupling with a diverse set of terminal alkynes to afford the ynimines in good to excellent yields. An unprecedented [5+1] heteroannulation reaction exploiting the reactivity of the ynimine generated in situ was subsequently developed for the synthesis of medicinally important heterocycles, including isoquinolines, azaindoles, azabenzofurans, azabenzothiophenes and carbolines.
CANNABINOID DERIVATIVES, METHODS OF MAKING, AND USE THEREOF
申请人:THE UNIVERSITY OF TENNESSEE RESEARCH CORPORATION
公开号:EP1633733A1
公开(公告)日:2006-03-15
EP1633733A4
申请人:——
公开号:EP1633733A4
公开(公告)日:2007-02-28
[EN] CANNABINOID DERIVATIVES, METHODS OF MAKING, AND USE THEREOF<br/>[FR] DERIVES CANNABINOIDES, LEURS METHODES DE FABRICATION ET LEURS APPLICATIONS
申请人:UNIV TENNESSEE RES FOUNDATION
公开号:WO2004113320A1
公开(公告)日:2004-12-29
1'-substituted cannabinoid derivatives of delta-8-tetrahydrocannabinol, delta-9-tetrahydrocannabinol, and delta-6a-10a-tetrahydrocannabinol that have affinity for the cannabinoid receptor type-1 (CB-1) and/or cannabinoid receptor type2 (CB-2). Compounds having activity as either agonists or antagonists of the CB-1 and/or CB-2 receptors can be used for treating CB-1 or CB-2 mediated conditions.