Terminal Alkyne Addition to Diazodicarboxylates: Synthesis of Hydrazide Linked Alkynes (Ynehydrazides)
摘要:
A new route to form C-sp-N bonds has been developed via addition of in situ generated lithium acetylides to sterically hindered diazodicarboxylates. The reaction provides straightforward access to a previously unexplored ynehydrazide class of stable N-linked alkynes directly from commercially available precursors. Preliminary results show that alkynyl hydrazides are useful reagents for the selective installation of nitrogen functional groups and as precursors to pharmaceutically relevant heterocycles using metal catalyzed cycloadditions and condensations.
[EN] CYCLIN-DEPENDENT KINASE INHIBITING COMPOUNDS FOR THE TREATMENT OF MEDICAL DISORDERS [FR] COMPOSÉS INHIBITEURS DE KINASE DÉPENDANT DE LA CYCLINE POUR LE TRAITEMENT D'AFFECTIONS MÉDICALES
Short and Modular Synthesis of Substituted 2-Aminopyrroles
作者:Raquel Diana-Rivero、Beate Halsvik、Fernando García Tellado、David Tejedor
DOI:10.1021/acs.orglett.1c01345
日期:2021.5.21
We herein describe a simple and metal-free domino methodology to synthesize 2-aminopyrroles from alkynyl vinyl hydrazides. The domino reaction involves a novel propargylic 3,4-diaza-Cope rearrangement and a tandem isomerization/5-exo-dig N-cyclization reaction. By using this approach, a number of 2-aminopyrroles with diverse substituents have been prepared.
Reactions of HDDA-Derived Benzynes with Sulfides: Mechanism, Modes, and Three-Component Reactions
作者:Junhua Chen、Vignesh Palani、Thomas R. Hoye
DOI:10.1021/jacs.6b01025
日期:2016.4.6
We report here reactions of alkyl sulfides with benzynes thermally generated by the hexadehydro-Diels-Alder (HDDA) cycloisomerization. The initially produced 1,3-betaine (o-sulfonium/aryl carbanion) undergoes intramolecular proton transfer to generate a more stable S-aryl sulfur ylide. This can react in various manners, including engaging weak acids (HA) in the reaction medium. This can produce transient
[EN] CYCLIN-DEPENDENT KINASE INHIBITING COMPOUNDS FOR THE TREATMENT OF MEDICAL DISORDERS<br/>[FR] COMPOSÉS INHIBITEURS DE KINASE DÉPENDANT DE LA CYCLINE POUR LE TRAITEMENT D'AFFECTIONS MÉDICALES
申请人:G1 THERAPEUTICS INC
公开号:WO2021236650A1
公开(公告)日:2021-11-25
This invention is in the area of cell cycle inhibiting compounds for the treatment of disorders involving abnormal cellular proliferation, and include selective CDK2 inhibitors for medical therapy and their pharmaceutically acceptable salts and compositions.
Terminal Alkyne Addition to Diazodicarboxylates: Synthesis of Hydrazide Linked Alkynes (Ynehydrazides)
作者:Ramsay E. Beveridge、Robert A. Batey
DOI:10.1021/ol2031608
日期:2012.1.20
A new route to form C-sp-N bonds has been developed via addition of in situ generated lithium acetylides to sterically hindered diazodicarboxylates. The reaction provides straightforward access to a previously unexplored ynehydrazide class of stable N-linked alkynes directly from commercially available precursors. Preliminary results show that alkynyl hydrazides are useful reagents for the selective installation of nitrogen functional groups and as precursors to pharmaceutically relevant heterocycles using metal catalyzed cycloadditions and condensations.