Hierarchically assembled helicates as reaction platform – from stoichiometric Diels–Alder reactions to enamine catalysis
作者:David Van Craen、Jenny Begall、Johannes Großkurth、Leonard Himmel、Oliver Linnenberg、Elisabeth Isaak、Markus Albrecht
DOI:10.3762/bjoc.16.195
日期:——
The stereoselectivity of a Diels–Alder reaction within the periphery of hierarchically assembled titanium(IV) helicates formed from mixtures of achiral, reactive and chiral, unreactive ligands was investigated in detail. Following the pathway of the chiral induction, the chiral ligands, solvents as well as substituents at the dienophile were carefully varied. Based on the results of the stoichiometric
详细研究了由非手性、反应性和手性、非反应性配体的混合物形成的分层组装的钛(IV)螺旋外围的狄尔斯-阿尔德反应的立体选择性。遵循手性诱导途径,仔细改变手性配体、溶剂以及亲双烯体上的取代基。基于化学计量反应的结果,还进行了仲胺催化的硝基迈克尔反应,该反应提供了合理的非对映选择性。