Synthesis of isothiosemicarbazones of potential antitumoral activity through a multicomponent reaction involving allylic bromides, carbonyl compounds and thiosemicarbazide
作者:Laiéli S. Munaretto、Misael Ferreira、Daniela P. Gouvêa、Adailton J. Bortoluzzi、Laura S. Assunção、Juliana Inaba、Tânia B. Creczynski-Pasa、Marcus M. Sá
DOI:10.1016/j.tet.2020.131231
日期:2020.6
of isothiosemicarbazones and 2-hydrazono-1,3-thiazin-4-ones through a multicomponent reaction featuring allylic bromides, carbonylcompounds and thiosemicarbazides is described. The transformations proceed under mild and environmentally benign conditions with high yields and stereoselectivity. All novel compounds were obtained in high purity without the need for chromatography stages. Different functional
Facile synthesis of γ-alkylidenebutenolides from Morita–Baylis–Hillman adducts
作者:Bo Ram Park、Ko Hoon Kim、Jin Woo Lim、Jae Nyoung Kim
DOI:10.1016/j.tetlet.2011.11.001
日期:2012.1
An expedient syntheticprocedure of γ-alkylidenebutenolides was developed via a sequential indium-mediated Barbier-type reaction of Morita–Baylis–Hillman bromide with aldehyde, lactonization, and double-bond isomerization. Various γ-alkylidenebutenolides including bovolide and its derivatives were synthesized in good overall yields.
Halodeboronation of organotrifluoroborates using tetrabutylammonium tribromide or cesium triiodide
作者:Min-Liang Yao、George W. Kabalka、David W. Blevins、Marepally Srinivasa Reddy、Li Yong
DOI:10.1016/j.tet.2012.03.016
日期:2012.5
Halodeboronation of organotrifluoroborates using commercially available tetrabutylammoniumtribromide (TBATB) or cesium triiodide in aqueous medium is reported. The mild, transition metal-free method has proven to be tolerant of a wide range of functional groups. High regio- and chemoselectivity are observed. Two synthetic routes to (Z)-dibromoalkenes from alkynes, through stereodefined (Z)-2-brom
Electron-withdrawing group effect in aryl group of allyl bromides for the successful synthesis of indolizines via a novel [3+3] annulation approach
作者:Sujin Park、Ikyon Kim
DOI:10.1016/j.tet.2015.02.013
日期:2015.4
A new synthetic approach to 6,7-disubstituted indolizines has been developed from pyrrole-2-carboxaldehydes and allyl bromides via two successive base-mediated reactions. As three-carbon units for formation of pyridine moiety of indolizines, allyl bromides easily derived from Morita–Baylis–Hillman (MBH) adducts were employed. We found that positioning electron-withdrawing group(s) at the aromatic ring
通过两个连续的碱介导的反应,由吡咯-2-羧醛和烯丙基溴开发了一种新的合成方法来合成6,7-二取代的吲哚嗪。作为形成吲哚嗪吡啶部分的三碳单元,采用了容易从森田-贝利斯-希尔曼(MBH)加合物衍生的烯丙基溴。我们发现,在烯丙基溴的芳香环上放置吸电子基团是成功闭环的关键,以允许获得具有独特取代方式的吲哚嗪。同样通过该方法组装结构上相关的咪唑并[1,2- a ]吡啶和吡啶并[1,2- a ]吲哚。
[EN] COMPOSITIONS AND METHODS FOR PROTEIN LABELING, MODIFICATION, ANALYSIS, AND TARGETED DELIVERY<br/>[FR] COMPOSITIONS ET PROCÉDÉS POUR LE MARQUAGE, LA MODIFICATION, L'ANALYSE ET LA DÉLIVRANCE CIBLÉE DE PROTÉINES
申请人:UNIV MASSACHUSETTS
公开号:WO2020006340A1
公开(公告)日:2020-01-02
The invention relates to chemically reactive and/or biologically active compounds, reagents and compositions thereof. More particularly, the invention provides novel reagents that are useful in chemical synthesis, functionalization, delivery, probing and/or analytical measurements of small molecule drugs, proteins, antibodies and other biomolecules. The invention provides novel biologically active agents useful as diagnostics or therapeutics, and related composition and methods of uses thereof.