183849-26-5Relevant articles and documents
Asymmetric Epoxidation of Unfunctionalized Olefins Using Novel Chiral Dihydroisoquinolinium Salts as Organocatalysts
Ali, K. Ben
, p. 638 - 646 (2021/06/02)
Abstract: Two new non-racemic chiral dihydroisoquinolinium salts with N-substituents bulkier than a methyl group have been synthesized from (1S,2R)-norephedrine. These salts were used to catalyze asymmetric epoxidation of a series of prochiral olefins. One of the two new catalysts provided higher enantioselectivities (up to 66% ee) than the reference salt containing an N-methyl substituent.
IRON-SALEN COMPLEX AND METHOD FOR PRODUCING OPTICALLY ACTIVE EPOXIDE USING THE SAME
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Page/Page column 22-30, (2018/06/12)
PROBLEM TO BE SOLVED: To produce optically active epoxide from olefin using a novel iron-salen complex. SOLUTION: There is provided a novel iron-salen complex represented by the following formula (in the formula, R1 each independently represent
Atropo- and Diastereoselective Construction of Tetracyclic Biphenylazepinium Salts Derived from Aminoalcohols: Use as Catalysts in Enantioselective Asymmetric Epoxidation
Bulman Page, Philip C.,Pearce, Christopher A.,Chan, Yohan,Parker, Phillip,Buckley, Benjamin R.,Rassias, Gerasimos A.,Elsegood, Mark R. J.
, p. 8036 - 8045 (2015/09/01)
A range of new biphenylazepinium salt organocatalysts effective for asymmetric epoxidation has been developed incorporating an additional substituted oxazolidine ring, and providing improved enantiocontrol in alkene epoxidation over the parent structure. Starting from enantiomerically pure aminoalcohols, tetracyclic iminium salts were obtained as single diastereoisomers through an atroposelective oxazolidine formation.
