1-Hydroxy-2-methyl-2-propyl Isocyanide (HMPI) as a New Convertible Isocyanide for the Ugi Four-Component-Coupling Reaction
2013; Thieme Medical Publishers (Germany); Volume: 24; Issue: 15 Linguagem: Inglês
10.1055/s-0033-1338967
ISSN1437-2096
AutoresMasato Oikawa, Yutaro Sugamata, Manami Chiba, Koichi Fukushima, Yuichi Ishikawa,
Tópico(s)Phosphorus compounds and reactions
ResumoThe 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 N -(1-hydroxy-2-methyl-2-propyl) amides, which are smoothly converted into esters upon Zn(OTf) 2 -mediated solvolysis. Overall, structurally diverse α-amino acid esters are readily accessible in two steps by using HMPI.
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