Palladium-Catalyzed Amination of 3,5-Dihalopyridines - a Convenient Route to New Polyazamacrocycles
作者:Alexei D. Averin、Olesya A. Ulanovskaya、Ilya A. Fedotenko、Anatolii A. Borisenko、Marina V. Serebryakova、Irina P. Beletskaya
DOI:10.1002/hlca.200590152
日期:2005.7
Pd-Catalyzed amination of 3,5-dibromo- and 3,5-dichloropyridine (1a and 1b, resp.) with linear polyamines 2 leads to the formation of a new family of pyridine-containing macrocycles 3 with an ‘exo’-oriented pyridine N-atom (Schemes 1 and 2). The dependence of the macrocycle yield on the nature of the halogen atom, the length of the polyamine chain and C/N atom ratio, and the composition of the catalytic
3,5-二溴和3,5-二氯吡啶Pd催化的胺化(1A和1B,RESP)与直链聚胺2根引线到含吡啶的大环的一个新的家庭的形成3用“外切”取向吡啶N-原子(方案1和2)。研究了大环产率对卤素原子的性质,多胺链的长度和C / N原子比以及催化体系组成的依赖性。的单-和二(5-卤代吡啶-3-基) -取代的多胺的合成4,5,8,9,和3,5-双(聚) -取代的吡啶6中描述(方案3和4),以及利用这些化合物作为中间体在途中对所述大环化合物7,16和18具有较大的空腔(“cyclodimers”和“cyclotrimers”)证明(方案5 - 10)。