Reactions of salicylaldehyde with tris(pentaf luorophenyl)silanes and secondary amines
作者:A. D. Dilman、D. E. Arkhipov、P. A. Belyakov、M. I. Struchkova、V. A. Tartakovsky
DOI:10.1007/s11172-006-0285-0
日期:2006.3
Reactions of tris(pentafluorophenyl)silanes RSi(C6F5)3 with salicylaldehyde and secondary amines were studied. The reactions afforded α-pentafluorophenyl-substituted amines. Silanes RSi(C6F5)3 (R = Me, Ph, C6F5, CH2CH=CH2, and CH=CH2) were found to be efficient reagents for transfer of the C6F5 group to the iminium cation generated from salicylaldehyde and amine. However, tris(pentafluorophenyl)phenylethynyl-and tris(pentafluorophenyl)silanes were not able to serve as a source of a fluorinated substituent because of competitive transfer of acetylenide fragment or hydride.
研究了三(五氟苯基)硅烷 RSi(C6F5)3 与水杨醛和仲胺的反应。反应生成了 α-五氟苯基取代胺。研究发现硅烷 RSi(C6F5)3(R = Me、Ph、C6F5、CH2CH=CH2 和 CH=CH2)是将 C6F5 基团转移到由水杨醛和胺生成的亚胺阳离子上的有效试剂。然而,三(五氟苯基)苯乙炔和三(五氟苯基)硅烷由于乙炔片段或氢化物的竞争性转移而不能作为氟化取代基的来源。