Palladium-catalyzed monoamination of dihalogenated benzenes
摘要:
The palladium-catalyzed monoamination of symmetric dibromobenzenes can be performed using a catalyst based on Pd(2)dba(3) and BINAP in the presence of NaO(t-Bu). The analogous transformation of non-symmetric bromoiodobenzenes is most effectively performed with Xantphos as the ligand, while reactions with BINAP were non-selective. These transformations can be scaled uneventfully to >10 g quantities. They do not require drybox or Schlenk techniques, and all reagents are weighed out in air. The resulting monobromoanilines are versatile intermediates for further synthetic transformations. (C) 2008 Elsevier Ltd. All rights reserved.
Palladium-catalyzed N-allylation of anilines by direct use of allyl alcohols in the presence of titanium(IV) isopropoxide
作者:Shyh-Chyun Yang、Wen-Hung Chung
DOI:10.1016/s0040-4039(98)02456-3
日期:1999.1
The direct activation of C-O bonds in allyl alcohols by palladium complexes has been accelerated by carrying out the reactions in the presence of titanium(IV) isopropoxide and 4A molecular sieves. N-Allylation of anilines to give mono- and diallylanilines using allyl alcohols directly has been realized by employing palladium catalysts. (C) 1999 Elsevier Science Ltd. All rights reserved.
An Efficient Palladium-Catalyzed Route to N-Allylanilines by the Direct Use of Allyl Alcohols