1007390-32-0Relevant academic research and scientific papers
Chiral octahedral complexes of Co(iii) as catalysts for asymmetric epoxidation of chalcones under phase transfer conditions
Larionov, Vladimir A.,Markelova, Elina P.,Smol'yakov, Alexander F.,Savel'yeva, Tat'yana F.,Maleev, Victor I.,Belokon, Yuri N.
, p. 72764 - 72771 (2015/09/15)
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%).
Nucleophilic asymmetric epoxidation catalyzed by cyclic guanidines
Kita, Tetsuya,Shin, Bongki,Hashimoto, Yuichi,Nagasawa, Kazuo
scheme or table, p. 241 - 247 (2009/09/06)
Asymmetric nucleophilic epoxidation of chalcone and its derivatives was studied using chiral cyclic guanidine compounds. Pentacyclic guanidine 1a, which has a characteristic closed-type cavity, catalyzed the reaction to give epoxides with 39-60% ee.The newly developed tricyclic guanidine 4 drastically accelerated the reaction, and induced the asymmetric induction of chalcones with almost the same level of 1a.
