Synthesis of 1,2-Diamino-1-phenylpropane Diastereoisomers from u-N-Trifluoroacetyl-2-amino-1-phenylpropan-1-ol
摘要:
A new simple procedure for the synthesis of diastereomeric 1,2-diamino-1-phenylpropanes starting from u-N-trifluoroacetyl-2-amino-1-phenylpropan-1-ol (N-trifluoroacetylnorephedrine) is described. The trifluoroacetyl protecting group was particularly suitable for the protection of the amino group in order to reduce side reactions.
NOVEL RUTHENIUM CATALYSTS AND THEIR USE FOR ASYMMETRIC REDUCTION OF KETONES
申请人:HADDAD Nizar
公开号:US20150005500A1
公开(公告)日:2015-01-01
Disclosed are novel ruthenium compounds of formula (Ia) and (Ib):
wherein R
1
and the moiety
are defined herein. Also disclosed is a process for using these novel ruthenium compounds as catalysts for asymmetric hydrogenation and transfer hydrogenation of ketones with high reactivities and excellent selectivities.