Abstract
The Ugi reaction is a useful four-component coupling reaction for α-(acylamino)amide. However, selective transformation of the two amides is generally difficult. Here, we report 1-hydroxy-2-methyl-2-propyl isocyanide (HMPI) as a new member of a ‘convertible isocyanide’ class used to solve the problem. HMPI is odorless and shows good reactivity in the Ugi reaction to give <i>N</i>-(1-hydroxy-2-methyl-2-propyl) amides, which are smoothly converted into esters upon Zn(OTf)<sub>2</sub>-mediated solvolysis. Overall, structurally diverse α-amino acid esters are readily accessible in two steps by using HMPI.
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