[EN] THIENO- AND FURO[2,3-D]PYRIMIDINE-2,4[1H,3H]-DIONE DERIVATIVES AS TRPC5 MODULATORS FOR THE TREATMENT OF NEUROPSYCHIATRIC DISORDERS [FR] DÉRIVÉS DE THIÉNO- ET FURO[2,3-D]PYRIMIDINE-2,4(1H,3H)-DIONE À TITRE DE MODULATEURS DES TRPC5 POUR LE TRAITEMENT DES TROUBLES NEUROPSYCHIATRIQUES
A facile synthesis of novel spiroindane-1,3-diones has been achieved via 1,3-dipolarcycloaddition of an azomethine ylide, generated in situ from ninhydrin and 1,2,3,4-tetrahydroisoquinoline, with the conjugated double bond of chalcone derivatives. The regiochemistry and structures of the cycloadducts were determined with spectroscopic data and by X-ray crystal structure analysis.
Experimental and theoretical approaches to [1,5]-prototropic generation of an azomethine ylide and a 1,3-dipolar cycloaddition for novel spiropyrrolidine oxindoles synthesis
of spiropyrrolidine oxindoles was synthesized via a multicomponent 1,3-dipolar cycloadditionreaction of isatin, benzylamine and chalcone derivatives. The regio- and stereochemistry of the products were established by single crystal X-ray structure and spectroscopic techniques. The molecular mechanism of this cycloaddition has been investigated by means of a density functional theory (DFT) method. The
摘要 通过靛红、苄胺和查耳酮衍生物的多组分1,3-偶极环加成反应合成了一系列螺吡咯烷羟吲哚。产物的区域和立体化学是通过单晶 X 射线结构和光谱技术确定的。已经通过密度泛函理论 (DFT) 方法研究了这种环加成的分子机制。评估了通过亚胺离子中的 [1,5]-H 位移制备偶氮甲碱叶立德的能量路径。基于反应物的过渡态稳定性、全局和局部反应性指数来解释区域选择性和立体选择性。环加成被假定通过一步途径发生,其中两个 C-C 键以非同步方式形成。
NaOH-Promoted Chemoselective Cascade Cyclization of Cyclopropyl Esters with Unsaturated Imines: Access to Bioactive Cyclopenta[c]pyridine Derivatives
作者:Dingwu Pan、Chengli Mou、Ningning Zan、Ya Lv、Bao-An Song、Yonggui Robin Chi、Zhichao Jin
DOI:10.1021/acs.orglett.9b02088
日期:2019.9.6
A chemoselective cascade cycloaddition reaction is developed for green and efficient access to cyclopenta[c]pyridine derivatives. Simple and inexpensive NaOH is used as the sole catalyst for this process. The δ-carbon of cyclopropyl ester is activated as a nucleophilic carbon to initiate highly chemoselective cascade reactions. Cyclopenta[c]pyridines bearing various substituents are afforded in excellent
A facile, water mediated, microwave-assisted synthesis of 4,6-diaryl-2,3,3a,4-tetrahydro-1H-pyrido[3,2,1-jk]carbazoles by a domino Fischer indole reaction–intramolecular cyclization sequence
benign, facile and efficient synthesis of a series of 4,6-diaryl-2,3,3a,4-tetrahydro-1H-pyrido[3,2,1-jk]carbazoles was achieved in water with good yield by the reaction of diastereomerically pure 2-(3-oxo-1,3-diarylpropyl)-1-cyclohexanones with phenylhydrazine hydrochloride under microwave irradiation. The transformation presumably proceeds via a domino Fischerindole reaction–intramolecular cyclisation
一系列的4,6-二芳基-2,3,3a,4-四氢-1 H-吡啶并[3,2,1- jk ]咔唑的环境友好,简便而有效的合成得以实现。水 非对映体纯的2-(3-氧代-1,3-二芳基丙基)-1-环己酮与 盐酸苯肼在微波照射下。这种转变大概是通过多米诺菲舍尔(Domino Fischer)进行的吲哚 反应-分子内 环化 顺序。
Greener [3+3] tandem annulation–oxidation approach towards the synthesis of substituted pyrimidines
作者:Kamlesh S. Vadagaonkar、Hanuman P. Kalmode、Sattey Prakash、Atul C. Chaskar
DOI:10.1039/c4nj02345e
日期:——
An efficient and practical method using choline hydroxide has been developed for the production of a wide range of substituted pyrimidines.