Acylative Dealkylation of N-tert-Butyl-3-substituted Azetidines: Facile Access to [1.1.0]Azabicyclobutane, 3-Hydroxyazetidinium Hydrochloride, and 3-Azetidinones
摘要:
A novel acylative dealkylation of N-tert-butylazetidines and its application to the facile high-yield syntheses of [1.1.0]azabicyclobutane, 3-hydroxyazetidinium hydrochloride, and 3-azetidinones is described.
Treatment of acute myeloid leukemia with indolinone compounds
申请人:SUGEN, Inc.
公开号:US20030130280A1
公开(公告)日:2003-07-10
A method of treating acute myeloid leukemia in patient positive for FLT-3-ITD is described. The treatment is accomplished by administration of a compound of Formula I or II as defined herein.
Treatment of excessive osteolysis with indolinone compounds
申请人:SUGEN, INC.
公开号:US20040209937A1
公开(公告)日:2004-10-21
Compounds of Formula I and Formula II, as described herein, are useful for treating excessive osteolysis, by inhibiting M-CSF mediated osteoclast development. The compounds also are useful for inhibiting phosphorylation of CSF1R, and for treating cancers that express CSF1R.
Flow Technology for Telescoped Generation, Lithiation and Electrophilic (C
<sub>3</sub>
) Functionalization of Highly Strained 1‐Azabicyclo[1.1.0]butanes
作者:Pantaleo Musci、Timo Keutz、Ferdinand Belaj、Leonardo Degennaro、David Cantillo、C. Oliver Kappe、Renzo Luisi
DOI:10.1002/anie.202014881
日期:2021.3.15
Strained compounds are privileged moieties in modern synthesis. In this context, 1‐azabicyclo[1.1.0]butanes are appealing structural motifs that can be employed as click reagents or precursors to azetidines. We herein report the first telescoped continuous flow protocol for the generation, lithiation, and electrophilic trapping of 1‐azabicyclo[1.1.0]butanes. The flow method allows for exquisite control
functionalized azetidines has been an ongoing challenge. Here, we report a general method to directly alkylate 1-azabicyclo[1.1.0]butane (ABB) with organometal reagents in the presence of Cu(OTf)2 to rapidly prepare bis-functionalized azetidines. This method allows for the preparation of azetidines bearing alkyl, allyl, vinyl, and benzyl groups. This catalyst system was extended to aziridines and spirocycles
Strain-Release-Driven Homologation of Boronic Esters: Application to the Modular Synthesis of Azetidines
作者:Alexander Fawcett、Amna Murtaza、Charlotte H. U. Gregson、Varinder K. Aggarwal
DOI:10.1021/jacs.9b01513
日期:2019.3.20
boronate complex which, upon N-protonation with acetic acid, undergoes 1,2-migration with cleavage of the central C-N bond to relieve ring strain. The methodology is applicable to primary, secondary, tertiary, aryl, and alkenyl boronic esters and occurs with complete stereospecificity. The homologated azetidinyl boronic esters can be further functionalized through reaction of the N-H azetidine, and through