An Efficient Entry to Optically Active anti- and syn-β-Amino-α-trifluoromethyl Alcohols
摘要:
The reaction of chiral 5,6-dihydro-2H-1,4-oxazin-2-ones with TMSCF3 in the presence of a suitable activator leads to trifluoromethyl lactols, which can be selectively reduced to anti-beta-amino-alpha-trifluoromethyl alcohols. The corresponding syn diastereoisomers are obtained when the starting imines are reduced and the nitrogen atom is conveniently protected. In addition, a novel rearrangement of the CF3 group in the lactol intermediates has been observed. This represents a formal CF3 addition to the imine function in the starting substrates.
An Efficient Entry to Optically Active anti- and syn-β-Amino-α-trifluoromethyl Alcohols
摘要:
The reaction of chiral 5,6-dihydro-2H-1,4-oxazin-2-ones with TMSCF3 in the presence of a suitable activator leads to trifluoromethyl lactols, which can be selectively reduced to anti-beta-amino-alpha-trifluoromethyl alcohols. The corresponding syn diastereoisomers are obtained when the starting imines are reduced and the nitrogen atom is conveniently protected. In addition, a novel rearrangement of the CF3 group in the lactol intermediates has been observed. This represents a formal CF3 addition to the imine function in the starting substrates.
available drugs to treat malaria are often ineffective due to the acquisition of drug resistance. In this context, drugs with innovative modes of action and no liability to cross-resistance are urgently needed. Recently, subtilisin-like protease 1, a P. falciparum serine protease involved in merozoite egress from red blood cells and invasion, has been identified as potential drugtarget. We describe