Effects of Aromatic Substituents on the Photocleavage of 1-Acyl-7-nitroindolines
摘要:
Photolysis of 1-acyl-7-nitroindolines in aqueous solution gives a carboxylic acid and a 7-nitrosoindole, These compounds are useful as photolabile precursors of carboxylic acids, particularly neuroactive amino acids. The effect of electron-donating substituents at the 4-position has been explored for its effect on photolysis efficiency. 4-Methoxy substitution improved the photolysis efficiency >2-fold but the 4-dimethylamino analogue was essentially inert. A 5-alkyl substituent, that blocks unwanted nitration at this position, reduced the beneficial effect of the 4-methoxy group. (C) 2000 Elsevier Science Ltd. All rights reserved.
[EN] EGFR SMALL MOLECULE INHIBITOR, PHARMACEUTICAL COMPOSITION CONTAINING SAME, AND USE THEREOF [FR] INHIBITEUR À PETITES MOLÉCULES EGFR, COMPOSITION PHARMACEUTIQUE LE CONTENANT ET SON UTILISATION [ZH] EGFR小分子抑制剂、含其的药物组合物及其用途
Rhodium-catalyzed C7-alkylation of indolines with maleimides
作者:Changduo Pan、Yun Wang、Chao Wu、Jin-Tao Yu
DOI:10.1039/c7ob03039h
日期:——
A rhodium(III)-catalyzed direct cross-coupling reaction of indolines with maleimides via C–H bond activation was developed. This protocol displays good functional group tolerance, which offers a novel approach to access C7 modified indoline derivatives including maleimide analogues.
1-Acyl-7-nitroindoline derivatives, their preparation and their use as photocleavable precursors
申请人:Medical Research Council
公开号:US06765014B1
公开(公告)日:2004-07-20
Photoreleasable compounds comprising a caging moiety linked to an effector moiety represented by structural formula (I) wherein R1 is hydrogen; C1-10 alkyl or substituted alkyl; O(CH2)n—Y; N(COZ)(CH2)mY; or N[(CH2)mY′[(CH2)NY]; R2 and R3 are independently selected from: hydrogen; C1-10 alkyl or substituted alkyl; or R2 and R3 together are cycloalkyl; R4 is hydrogen; C1-10 alkyl or substituted alkyl; phenyl or substituted phenyl; (CH2)nY; or (CH2)mO(CH2)nY; wherein m and n are independently between 1 and 10; Y and Y′ are independently selected from hydrogen, CO2H or salts thereof or OPO32−, Z is hydrogen or C1-10 alkyl or substituted alkyl; and, X is an effector moiety or a group capable of being coupled or converted to an effector moiety, which are capable of releasing the effector moiety on irradiation, typically by flash irradiation with UV light. The photoreleasable compounds can therefor be used to deliver biologically active effector moieties such as neuroactive amino acids or metal chelators to sites where their activity is required.
Rhodium(III)-catalyzed direct C-7 sulfonamidation and amination of indolines with arylsulfonamides and trifluoroacetamide
作者:Yaqun Dong、Song Sun、Jin-tao Yu、Jiang Cheng
DOI:10.1016/j.tetlet.2019.03.069
日期:2019.5
A rhodium-catalyzeddirect C–H sulfonamidation and amidation of C-7 position of indolines by simple and commercially available arylsulfonamides and trifluoroacetamide has been developed, affording a series of N-arylsulfonamides and N-aryltrifluoroacetamides in moderate to excellent yields, respectively. Notably, this catalytic system is highly convenient on mmol scale.
Designed switch from covalent to non-covalent inhibitors of carboxylesterase Notum activity
作者:Benjamin N. Atkinson、Nicky J. Willis、Yuguang Zhao、Chandni Patel、Sarah Frew、Kathryn Costelloe、Lorenza Magno、Fredrik Svensson、E. Yvonne Jones、Paul V. Fish
DOI:10.1016/j.ejmech.2023.115132
日期:2023.5
palmiteolate pocket with key interactions being aromatic stacking and a watermediated hydrogen bond to the oxyanion hole. These N-acyl indolines 4 will be useful tools for use in vitro studies to investigate the role of Notum in disease models, especially when paired with a structurally related covalent inhibitor (e.g. 4w and 2a). Overall, this study highlights the designed switch from covalent to non-covalent
REGIOSELECTIVE NITRATION OF 1-ACYL-4-METHOXYINDOLINES LEADS TO EFFICIENT SYNTHESIS OF A PHOTOLABILE<scp>l</scp>-GLUTAMATE PRECURSOR
作者:George Papageorgiou、John E. T. Corrie
DOI:10.1081/scc-120004148
日期:2002.1
Different nitrating reagents give different ratios of 5- and 7-nitro isomers of the title indolines. The best ratio of the 7-nitro isomer was obtained with claycop-acetic anhydride, and these conditions were particularly useful for preparation of a photolabile L-glutamate derivative.