Highly strained 2H‐azirines with a tetrasubstituted stereocenter were synthesized by the enantioselective isomerization of isoxazoles with a chiral diene–rhodium catalyst system. The effect of ligands and the coordination behavior support the proposed catalytic cycle in which the coordination site is fixed in favor of efficient enantiodiscrimination by a bulky substituent of the ligand. In silico studies
通过手性二
烯-
铑催化剂体系对
异恶唑进行对映选择性异构化反应,合成了具有四取代立体中心的高应变2 H-
叠氮基。
配体的作用和配位行为支持了拟议的催化循环,其中配位位点固定,有利于
配体的庞大取代基有效地对映歧化。
硅计算机研究也支持
铑-亚
氨基复合物作为对映异构的关键
中间体的存在。