Chiral octahedral complexes of Co(<scp>iii</scp>) as catalysts for asymmetric epoxidation of chalcones under phase transfer conditions
作者:Vladimir A. Larionov、Elina P. Markelova、Alexander F. Smol'yakov、Tat'yana F. Savel'yeva、Victor I. Maleev、Yuri N. Belokon
DOI:10.1039/c5ra11760g
日期:——
Stereochemically inert and positively charged chiral complexes of Co(III) were shown to catalyze the asymmetric epoxidation of chalcones with H2O2 under phase transfer conditions. The reaction products had enantiomeric purities of up to 55%. It was also shown that complex 1a I− catalyzed the coupling reaction of a resulting epoxide with CO2 (conversion 72%).
在相转移条件下,Co(III)的立体化学惰性和带正电荷的手性配合物可催化查耳酮与H 2 O 2的不对称环氧化。反应产物的对映体纯度高达55%。它也表明,复杂1A我-催化的与CO所得环氧化物的偶联反应2(转化72%)。