Direct and Stereospecific Synthesis of
<i>N</i>
‐H and
<i>N</i>
‐Alkyl Aziridines from Unactivated Olefins Using Hydroxylamine‐
<i>O</i>
‐Sulfonic Acids
作者:Zhiwei Ma、Zhe Zhou、László Kürti
DOI:10.1002/anie.201705530
日期:2017.8.7
A RhII-catalyzed direct and stereospecific N-H- and N-alkyl aziridination of olefins is reported that uses hydroxylamine-O-sulfonic acids as inexpensive, readily available, and nitro group-free aminating reagents. Unactivated olefins, featuring a wide range of functional groups, are converted into the corresponding N-H or N-alkyl aziridines in good to excellent yields. This operationally simple, scalable
Compounds, Compositions, and Methods for Cancer Therapy
申请人:The Broad Institute, Inc.
公开号:US20140024639A1
公开(公告)日:2014-01-23
Compounds including various oligomers of piperlongumine and/or piperlongumine analogues as well as certain piperlongumine analogues that exhibit improved toxicity to cancer cells are disclosed. Also provided are compositions that comprise the compounds, methods of making compositions comprising the compounds, methods of making the compounds, and the use of compounds in methods for treating cancer.
2-nitroimidazole derivatives useful as radiosensitizers for hypoxic
申请人:Warner-Lambert Company
公开号:US04797397A1
公开(公告)日:1989-01-10
Certain .alpha.-[(2-nitro-1H-imidazol-1-yl)methyl]-aziridinylethanols and the corresponding aziridine-ring opened analogs are useful as radiation sensitizers for X-irradiation therapy of tumors.
2-nitroimidazole derivatives useful as radiosensitizers for hypoxic tumor cells
申请人:WARNER-LAMBERT COMPANY
公开号:EP0302416A1
公开(公告)日:1989-02-08
α-[(2-nitro-1H-imidazol-1-yl)methyl]-(A) azaridinylethanol derivatives of formula I
and the corresponding aziridine-ring opened analogs are useful as radiation sensitizers for X-irradiation therapy of tumors.
Enantioselective fluoride ring opening of aziridines enabled by cooperative Lewis acid catalysis
作者:Julia A. Kalow、Abigail G. Doyle
DOI:10.1016/j.tet.2013.01.062
日期:2013.7
The enantioselective ring opening of aziridines using a latent source of HF is described. A combination of two Lewis acids, (salen)Co and an achiral Ti(IV) cocatalyst, provided optimal reactivity and enantioselectivity for the trans beta-fluoroamine product. The use of a chelating aziridine protecting group was crucial. Acyclic and cyclic meso N-picolinamide aziridines underwent fluoride ring opening in up to 84% ee, and the kinetic resolution of a piperidine-derived aziridine was performed with k(rel)=6.6. The picolinamide group may be readily removed without epimerization of the fluoroamine. Preliminary studies revealed a bimetallic mechanism wherein the chiral (salen)Co catalyst delivers the nucleophile and the Ti(IV) cocatalyst activates the aziridine. (C) 2013 Elsevier Ltd. All rights reserved.