Journal
ORGANIC LETTERS
Volume 5, Issue 11, Pages 1967-1970Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol034555l
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- NIAID NIH HHS [AI 35707] Funding Source: Medline
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[GRAPHIC] The relative rates of Michael additions of 2'-(phenethyl)thiol to representative vinyl sulfonyl Michael acceptors were measured. The dependence of the reactivity of the Michael acceptor on the nature of the sulfonyl R substituent was determined in order to evaluate the effect of these substituents on the inactivation kinetics of comparably substituted vinyl sulfonyl cysteine protease inhibitors. The rates of these Michael additions vary over 3 orders of magnitude, with phenyl vinyl sulfonate esters (R = OPh) being ca. 3000-fold more reactive than N-benzyl vinyl sulfonamides (R = NHBn).
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