Bis(amidate)bis(amido) Titanium Complex: A Regioselective Intermolecular Alkyne Hydroamination Catalyst
作者:Jacky C.-H. Yim、Jason A. Bexrud、Rashidat O. Ayinla、David C. Leitch、Laurel L. Schafer
DOI:10.1021/jo402668q
日期:2014.3.7
o) titanium precatalyst for the anti-Markovnikov hydroamination of alkynes is reported. Hydroamination of terminal and internal alkynes with primary alkylamines, arylamines, and hydrazines is promoted by 5–10 mol % of Ti catalyst. Various functional groups are tolerated including esters, protected alcohols, and imines. The in situ generated complex shows comparable catalytic activity, demonstrating
报道了一种有效且选择性的双(氨基酸酯)双(酰胺基)钛预催化剂,用于炔烃的抗马尔科夫尼科夫加氢胺化反应。5-10 mol%的Ti催化剂促进了末端和内部炔烃与伯烷基胺,芳基胺和肼的氨化反应。容许各种官能团,包括酯,保护的醇和亚胺。原位生成的复合物显示出可比的催化活性,证明了其在台式应用中的合成多功能性。描述了该催化剂在合成氨基醇中的应用和一锅法在吲哚合成中的应用。提出了一种机制建议,要求限制营业额的质子分解,以合理化所观察到的区域选择性。