Reductive coupling of aromatic aldehydes and imines by the low valent titanium species generated in the reaction of TiCl4 with Et3N
作者:Mariappan Periasamy、Gadthula Srinivas、Galla V Karunakar、Pandi Bharathi
DOI:10.1016/s0040-4039(99)01609-3
日期:1999.10
Aromatic aldehydes and imines are converted to the corresponding diols and diamines using the lowvalenttitanium species generated by the reaction of TiCl4 with triethylamine.
使用由TiCl 4与三乙胺反应生成的低价钛物质,将芳香醛和亚胺转化为相应的二醇和二胺。
CHEMICAL TRANSFER OF WARNING INFORMATION IN NON-INJURED FISH
作者:Luciana Jordão、Gilson Volpato
DOI:10.1163/156853900502286
日期:——
Moreover, we investigate whether this chemicalinformation indicates the presence of a specific predator, or whether it indicates general disturbance. We exposed groups of pacus to the view of a predator fish (trahira, Hoplias malabaricus ), a non-predator fish (piracanjuba, Brycon orbignyanus ) or an aquarium without any fish (control), and then we transferred their water to isolated conspecifics.
Sur le dianilino-1, 2-diphényl-1, 2-éthane. Séparation de diastéréoisomères sous forme de complexes avec la diméthylformamide
作者:Roland Jaunin
DOI:10.1002/hlca.19560390114
日期:——
Dimethylformamide has been found to give solid complexes with both d,l and meso 1,2-dianilino-1, 2-diphenylethanes (I), but only with the meso forms of 1,2-di-o- and 1,2-di-p-toluidino-1,2-diphenylethanes (resp. II and III). These complexes are particularly suitable for the separation of diastereomeric mixtures of I and of II, respectively. IR. spectra of the dimethylformamidecomplexes of I show evidence
We report the first direct and chemoselective reductive homocoupling reaction of secondary amides and cross-coupling reaction of secondary amides with ketones. This method relies on the direct generation of α-amino carbon radicals from amides.