[EN] CATALYTIC SCAVENGERS OF ORGANOPHOSPHATES TO POTENTIATE BUTYRYLCHOLINESTERASE (BCHE) AS A CATALYTIC BIOSCAVENGER AND METHODS FOR MAKING AND USING THEM<br/>[FR] PIÉGEURS CATALYTIQUES D'ORGANOPHOSPHATES POUR POTENTIALISER LA BUTYRYLCHOLINESTÉRASE (HBCHE)
申请人:UNIV CALIFORNIA
公开号:WO2015057822A1
公开(公告)日:2015-04-23
Provided are N-alkyl imidazole 2-aldoximes, including cationic imidazolium and uncharged tertiary imidazole aldoximes, and compositions and methods for making and using them, including methods for reactivating human butyrylcholinesterase (hBChE) or acetylcholinesterase (hAChE ) inhibited by organophosphate (OP). By administration of a composition of the invention, the inactive or conjugated hBChE-OP or hAChE-OP is reactivated and the catalytic cycle of turnover and inactivation of the OP is completed; and in alternative embodiments, secondary mechanisms of reversible protection of hBChE and hAChE from irreversible inactivation by OPs and reactivation of tissue AChE also contribute to overall efficacy.
A detailed study of the Ni‐catalyzed [4+3+2] cycloaddition reaction between ethyl cyclopropylideneacetate and dienynes has been conducted, resulting in the development of a newmethod for the synthesis of compounds containing nine‐membered rings. We studied the reactivity of various dienynes, together with their substituent and conformational effects. The mechanism of the reaction was probed by examining
Catalytic Synthesis of 8‐Membered Ring Compounds via Cobalt(III)‐Carbene Radicals
作者:Minghui Zhou、Marianne Lankelma、Jarl Ivar Vlugt、Bas Bruin
DOI:10.1002/anie.202002674
日期:2020.6.26
The metalloradical activation of o ‐aryl aldehydes with tosylhydrazide and a cobalt(II) porphyrincatalyst produces cobalt(III)‐carbene radical intermediates, providing a new and powerful strategy for the synthesis of medium‐sized ring structures. Herein we make use of the intrinsic radical‐type reactivity of cobalt(III)‐carbene radical intermediates in the [CoII(TPP)]‐catalyzed (TPP=tetraphenylporphyrin)
用甲苯磺酰肼和钴(II)卟啉催化剂对邻芳基醛进行金属自由基活化,产生钴(III)卡宾自由基中间体,为合成中等大小的环结构提供了一种新的强大策略。在此,我们利用钴(III)-卡宾自由基中间体的固有自由基型反应活性,在[Co II (TPP)]催化(TPP=四苯基卟啉)合成两种类型的8元环化合物;新型二苯并环辛烯和前所未有的单苯并环辛二烯。该方法已成功应用,以良好的收率和优异的取代基耐受性提供了多种八元环化合物。密度泛函理论(DFT)计算和实验结果表明,反应通过氢原子从双烯丙基/苯甲基烯丙基CH键转移到卡宾自由基进行,然后通过两个不同的过程进行闭环,形成两种不同类型的碳烯。 8元环产物。虽然二苯并环辛烯很可能是由邻醌二甲烷 ( o -QDM) 解离形成的,经过非催化 8π 环化,DFT 计算表明单苯并环辛二烯的闭环涉及钴配位层中的自由基反弹步骤。后一种机制意味着手性单苯并环辛二烯前所未有的对映
A New Protocol for the Synthesis of N(1)-Unsubstituted 2-Substituted 2-Imidazolines
作者:Raymond C.F. Jones、Paschalis Dimopoulos
DOI:10.1016/s0040-4020(00)00108-3
日期:2000.3
Lateral metallation at C-2(α) of 1-tert-butoxycarbonyl-2-methyl-2-imidazoline followed by reaction with a range of C-electrophiles and deprotection with TFA reliably affords N(1)-unsubstituted 2-substituted2-imidazolines; P- or Se-electrophiles lead to 2-alkenyl-2-imidazolines via Wadsworth–Emmons or selenoxide elimination protocols.
The facile synthesis of tetracyclic molecular frameworks employing a Lewis acid promoted domino reaction of naphthoquinones with hydroxy- and amino-functionalized cross-conjugated trienes is reported. The reaction cascade involves a heterocyclization via hemiacetal or imine formation, and an intramolecular Diels-Alder cycloaddition. tetracyclic scaffolds -naphthoquinone- Lewis acid promoted domino