The methods for the preparation of O- and N-functional orthocarbonic acid derivatives are reviewed, and a survey of the reactions of these compounds with electrophilic and nucleophilic reagents is given. 1. Synthesis of Orthocarbonic Acid Esters 1.1 Reaction of Substituted Trichloromethanes with Alcohols, Alkoxides, Phenols, or Phenoxides 1.2. Reaction of Substituted Dichloromethanes with Alcohols or Phenols 1.3. Reaction of Trialkoxycarbenium Salts with Alkoxides 1.4. Reaction of Cyanic Acid Esters with Alcohols 1.5. Thermolysis of Cyclic Carbonic Acid Derivatives 1.6. Reaction of Carbon Disulfide with Thallium(I) Alkoxides 1.7. Reaction of Carbon Disulfide with Organotin Compounds 1.8. Reaction of Zinc Xanthates with Alcohols 1.9. Transesterification of Orthocarbonic Acid Esters 2. Synthesis of Orthocarbamic Acid Esters 2.1. Reaction of Trihetero-substituted Carbenium Ions with Alkoxides 2.2. Alcoholysis of Tetramethylurea Diethyl Acetal 2.3. Transesterification of Orthocarbamic Acid Esters 2.4. Spirocyclic Orthocarbamic Acid Esters from Organotin Compounds 3. Synthesis of Bis[dialkylamino]-dialkoxymethanes (Tetraalkylurea Dialkyl Acetals) 3.1. Reaction of Bis[dialkylamino]-ethoxycarbenium Tetrafluoroborates with Alkoxides 3.2. Reaction of Tetraalkylurea Dichlorides (Chloroformamidinium Chlorides) with Alcohols or Alkoxides 3.3. Reaction of 2,2-Dichloro-1,3-benzodioxole with Amines 3.4. Spirocyclic Urea Acetals from Organotin Compounds 4. Synthesis of Alkoxytris[dialkylamino]methanes 5. Synthesis of Tetrakis[dialkylamino]methanes 6. Reactions of O- and N-Functional Orthocarbonic Acid Derivatives 6.1. Reactions with Electrophilic Agents 6.2. Reactions with Nucleophilic Agents 6.3. Miscellaneous Reactions of Orthocarbonic Acid Derivatives
Synthesis and reactivity of substituted α-carbonylphosphonites and their derivatives
作者:Andrey A. Prishchenko、Mikhail V. Livantsov、Olga P. Novikova、Ludmila I. Livantsova、Valery S. Petrosyan
DOI:10.1002/hc.21024
日期:——
Convenient methods for the synthesis of functionalized organophosphorus compounds containing carbonyl groups as well as di- or trialkoxymethyl fragments attached to phosphorus, and their derivatives, starting from the available derivatives of trivalent phosphorus acids, are proposed, and some properties of the new functionalized organophosphorus compounds are presented. So, the alkylation and acylation
acting angiotensin II (AII) receptor antagonist. The AII antagonistic activity of the benzimidazoles was investigated by in vitro assays, which included an AII receptor binding assay and AII-induced vasocontraction assay, as well as by in vivo assays such as an AII-induced pressor response in rats. Most of the benzimidazoles showed high affinity for the AII receptor (IC50 value, 10(-6)-10(-7) M) and inhibited
由关键中间体3-氨基-2-[[((联苯基-4-基)甲基]中间体制备了一系列2-取代的-1-[((联苯基-4-基)甲基] -1H-苯并咪唑-7-羧酸]氨基]苯甲酸酯(6a-c)以阐明2-丁基-1-[[[2'-(1H-四唑-5-基)联苯-4-基]甲基]的各种类似物的结构活性关系-1H-苯并咪唑-7-羧酸(CV-11194),一种有效的长效血管紧张素II(AII)受体拮抗剂。通过体外试验研究了苯并咪唑的AII拮抗活性,其中包括AII受体结合试验和AII诱导的血管收缩试验,以及体内试验,例如AII诱导的大鼠升压反应。大多数苯并咪唑对AII受体表现出高亲和力(IC50值为10(-6)-10(-7)M),并在1或3 mg / kg po时抑制AII诱导的升压反应,并且其作用比CV-11194和DuP 753更为有效。关于结合亲和力和抑制AII诱导的升压反应的结构-活性关系研究表明,一定长度的直链(如乙
Simple hydrothermal synthesis and photocatalytic performance of coral-like BaTiO<sub>3</sub> nanostructures
作者:Yonghong Ni、Hangsong Zheng、Nannan Xiang、Kefeng Yuan、Jianming Hong
DOI:10.1039/c4ra13642j
日期:——
Coral-like BaTiO3 nanostructures with good photocatalytic performances were successfully prepared through a simple hydrothermal route.
5-(Pyridinyl)-benzimidazole derivatives and preparation
申请人:STERLING DRUG INC.
公开号:EP0055453A2
公开(公告)日:1982-07-07
5-(Py-Y)-1H-benzimidazol-2-ol or 5-(Py-Y-1H-benzimidazole-2-thiol or lower-alkyl ethers or thioethers thereof or pharmaceutically-acceptable acid-addition salts thereof where Y is a direct linkage or lower-alkylene having one or two carbon atoms and Py is 4- or 3-pyridinyl, optionally having one or two lower-alkyl substituents, or 1-oxide of such pyridinyl, useful as cardiotonics, are prepared by reacting 4-(Py-Y)-1,2-benzenediamine with urea or carbony-Idiimidazole to produce 5-(Py-Y)-1H-benzimidazol-2-ol or with thiourea, an alkali metal lower-alkyl xanthate orthiocar- bonyldiimidazole to produce 5-(Py-Y)-1H-benzimidazole-2-thiol and by reacting 5-(Py-Y)-lH-benzimidazole-2-thiol with a lower-alkylating agent to produce 2-(lower-alkylthio-)-5-(Py-Y)-1 H-benzimidazole. 2-(Lower-alkoxy)-5-(Py-Y)-1 H-benzimidazoles are prepared by reacting 4-(Py-Y)1,2-benzenediamine with tetra-(lower-alkoxy)methane. The N-oxides may be prepared by reaction with a per-organic acid in a suitable solvent.