Stereoselective Synthesis of Multifunctionalized 1,2,4-Triazolidines by a Ruthenium Porphyrin-Catalyzed Three-Component Coupling Reaction
作者:Ming-Zhong Wang、Hai-Wei Xu、Yungen Liu、Man-Kin Wong、Chi-Ming Che
DOI:10.1002/adsc.200600320
日期:2006.11
Multifunctionalized 1,2,4-triazolidines have been synthesized by a ruthenium porphyrin-catalyzed three-component coupling reaction. In a one-pot reaction, ruthenium porphyrins catalyzed the in situ generation of azomethine ylides from α-diazo esters and imines. Stereoselective 1,3-dipolar cycloaddition reactions of the azomethine ylides with dialkyl azodicarboxylates gave the corresponding 1,2,4-triazolidines
通过钌卟啉催化的三组分偶联反应已经合成了多官能化的1,2,4-三唑烷。在一锅法反应中,卟啉钌催化α-重氮酯和亚胺从原位生成甲亚胺基化物。偶氮甲亚胺基化物与偶氮二羧酸二烷基酯的立体选择性1,3-偶极环加成反应以良好的收率(最高85%)得到了相应的1,2,4-三唑烷。使用手性8-苯基薄荷醇α-重氮酯作为类胡萝卜素来源,已获得具有良好非对映选择性(最高84%de)的手性1,2,4-三唑烷。1,2,4-三唑烷中的一些对人鼻咽癌(SUNE1)(IC 50 = 10.4μM )和人宫颈癌(Hela)(IC50 = 10.7μM)细胞系。