SmI2-mediated reductive cleavage of α-hetero substituents of α-alkyl or α-aryl ketones and lactone gave the corresponding “thermodynamic samarium enolates”. Enantioselective protonation of the samarium enolates with C2-symmetric chiral diols afforded the corresponding ketones and lactone in moderate to high enantioselectivities.
Titanocene(III)‐Catalyzed Precision Deuteration of Epoxides
作者:Dina Schwarz G. Henriques、Elena Rojo‐Wiechel、Sven Klare、Regine Mika、Sebastian Höthker、Jonathan H. Schacht、Niklas Schmickler、Andreas Gansäuer
DOI:10.1002/anie.202114198
日期:2022.2
Titanocene catalysis delivers D to the more substituted C-atom of epoxides with high efficiency, deuterium incorporation, and stereoselectivity. A novel method of catalyst activation that prevents isotope scrambling warrants the excellent performance of the reaction.
二茂钛催化将 D 传递至环氧化物中取代较多的 C 原子,具有高效率、氘并入和立体选择性。一种防止同位素扰乱的催化剂活化新方法保证了反应的优异性能。