Antimony(<scp>v</scp>) cations for the selective catalytic transformation of aldehydes into symmetric ethers, α,β-unsaturated aldehydes, and 1,3,5-trioxanes
作者:Renzo Arias Ugarte、Deepa Devarajan、Ryan M. Mushinski、Todd W. Hudnall
DOI:10.1039/c6dt02121b
日期:——
acidity of [2][OTf] was exploited in the catalytic reductivecoupling of a variety of aldehydes into symmetric ethers of type L in good to excellent yields under mild conditions using Et3SiH as the reductant. Additionally, [2][OTf] was found to selectively catalyze the Aldol condensation reaction to afford α-β unsaturated aldehydes (M) when aldehydes with 2 α-hydrogen atoms were used. Finally, [2][OTf]
The invention provides aminoacid-arylaminoalkylamides in which the C-terminal carboxy group of the amino acid is substituted by an arylaminoalkylamino substituent and in which the amino nitrogen atom of the amino acid forms a peptide or pseudopeptide linkage which optionally additionally comprises a -methylene-hetero atom- linker or an additional hetero atom, through which it is directly substituted by aryl, lower alkyl, lower alkenyl, lower alkynyl or heterocyclyl, or a physiologically-acceptable and -cleavable ester of a salt thereof; in particular compounds of formula (I), or a physiologically-acceptable and -cleavable ester or a salt thereof, wherein the symbols are as defined, as cathepsin K inhibitors for use pharmaceutically for therapeutic or prophylactic treatment of diseases or medical conditions in which cathepsin K is implicated.