Preparation of 7-(1,3,4-oxadiazolyl)-6,14-endo-etheno-6,7,8,14-tetrahydrothebaines and related compounds as potential analgesics
作者:Kenneth W. Bentley、Michael Burton、Barrie C. Uff
DOI:10.1021/jm00376a008
日期:1984.10
General procedures for the preparation of 7 alpha-(2-substituted-1,3, 4-oxadiazol-5-yl)-6,14-endo-etheno-6,7,8,14-tetrahydrothebaines are described. Substituents include alkyl, aryl, amino, cycloamino, and alkylthio functions. Many of these and related compounds show analgesic activity intermediate between codeine and morphine in the Hendershot and Forsaith writhing test. An unsuccessful attempt was
The technically important side-chain oxidation of alkyl aromaticcompounds to from either methyl benzoates or orthobenzoic acid trimethylesters can be performed electrochemically at low potentials in methanol solution using an undivided cell and tris(2,4-dibromopheny1)amine as redox catalyst. Under neutral or slightly acidic conditions methyl benzoates are selectively formed while under basic conditions
The reaction of methyl dithiocarboxylates with dialkoxydibutylstannanes at 60-95°C afforded the corresponding trialkyl orthocarboxylates in good yields.
Simple Synthetic Approach to N-(Pyridin-2-yl)imidates from Nitrostyrenes and 2-Aminopyridines via the N-(Pyridin-2-yl)iminonitriles as Intermediates
作者:Andriani G. Chaidali、Ioannis N. Lykakis
DOI:10.3390/molecules28083321
日期:——
A facile, green, syntheticprotocol of several substituted N-(pyridin-2-yl)imidates from nitrostyrenes and 2-aminopyridines via the corresponding N-(pyridin-2-yl)iminonitriles as intermediates is reported. The reaction process involved the in situ formation of the corresponding α-iminontriles underheterogeneous Lewis acid catalysis in the presence of Al2O3. Subsequently, α-iminonitriles were selectively
A phenolic resin is obtained by condensation reaction between a specific trifunctional aromatic compound and a phenolic compound. The resin can be reacted with a curing agent such as a hexamine to give cured articles having excellent heat resistance, electrical properties, wear resistance and chemical resistance, and the phenolic resin is also much more excellent in curing reactivity as compared with conventional techniques. The aromatic compound is represented by the formula :
(wherein each of R1, R2 and R3 is independently a hydroxyl group, a halogen atom or a lower alkoxy group having 3 or less carbon atoms, and particularly both of R2 and R3 may be replaced with one oxygen atom ; and each of X1 and X2 is independently a hydrogen atom, a halogen atom or an alkyl group).