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- W2018923961 abstract "Abstract Addition of triethylamine to a mixture of 2-pyridylthioesters and SnCl 4 or SnBr 4 affords the corresponding tin(IV) enolates that add to imines to give β-lactams in fair to good yields and with various degree of trans/cis stereoselectivity. Examples of highly diastereofacially selective reactions carried out on a chiral thioester and on a chiral imine are also reported. The results are compared with those obtained in the condensations promoted by TiCl 4 and TiBr 4 ." @default.
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- W2018923961 title "Synthesis of β-lactams by condensation of the tin enolates of 2-pyridylthioesters with imines. A comparison between titanium and tin enolates" @default.
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