摘要:
The invention relates to a process for preparing a (hetero)aromatic olefin, in which an optionally substituted olefin is arylated in the presence of a metal (compound) containing a metal from any one of groups 8, 9 or 10 of the Periodic System, a compound being chosen as the arylating agent that has the formula (1): Ar-CO-YCOA where Ar stands for an optionally substituted (hetero)aromatic group; A stands for an optionally substituted (hetero)aromatic or aliphatic group, an optionally substituted alkoxy or aryloxy group or a bond with Ar; Y stands for an optionally substituted heteroatom, and the arylation is carried out in the presence of a halide. As the arylating agent use is preferably made of an aromatic carboxylic anhydride, for example benzoic anhydride. Suitable for use as the (metal) compound containing a metal from any one of groups 8, 9 or 10 of the Periodic System is a compound from the group comprising PdCl2, PdBr2, PdI2, Na2PdCl4, Na2PdCl6, Pd2(dibenzylidene acetone)3, (Ph3P)4Pd, (PhCN)2PdCl2, Pd(OAc)2 and PdSO4. Suitable for use as the halide is a compound from the group comprising halides of alkali metals, quaternary ammonium halides and quaternary phosphonium halides.
摘要:
Cyano and carboxy derivatives of substituted styrenes of formula (I), in which Y is -COZ, -CN, or lower alkyl of 1 to 5 carbon atoms; Z is -OH, -NR R , -R , or -OR ; X, R , R , R , R , R , R , and R have the values given in the description are inhibitors of tumor necrosis factor alpha , nuclear factor kappa B, and phosphodiesterase and can be used to combat cachexia, endotoxic shock, retrovirus replication, asthma, and inflammatory conditions. A typical embodiment is 3,3-bis-(3,4-dimethoxyphenyl)acrylonitrile.
摘要:
The invention provides a process for the production of organic nitriles from the corresponding aldoxime. More particularly, the invention provides a process in which acid salts are used to convert an aldoxime to its corresponding nitrile, which process produces the nitrile in very high yield.
摘要:
A process for producing a nitrile represented by the general formula (1): RC=N wherein R represents alkyl, alkenyl, aralkyl or aryl each of which may be substituted, by heating an aldoxime represented by the general formula (2): RCH=NOH wherein R is as defined above, in the presence of at least one catalyst selected among hydroxides and alcoholates of alkali metals and alkaline earth metals, and distilling off water formed in the course of the reaction from the reaction system. The process enables nitriles useful as the starting material for the organic synthesis of perfumes, medicines and so forth to be produced in high yields at a remarkably reduced production cost.