Tetrahedron Letters p. 8607 - 8610 (1995)
Update date:2022-09-26
Topics:
Shimizu, Makoto
Kamei, Mie
Fujisawa, Tamotsu
Highly enantioselective reduction of 1,2-bis(p-methoxyphenylimino)-1,2-diphenylethane was conducted even with 0.5 mol% of new oxazaborolidine derived from L-threonine and a stoichiometric amount of BH3·THF to give 1,2-diphenylethylenediamine derivative in excellent enantiomeric purity. The subsequent deprotection of nitrogen atoms afforded (R,R)-1,2-diphenylethylenediamine in enantiomerically pure form.
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