Synthesis of orthogonally protected lanthionines: a reassessment of the use of alanyl β-cation equivalents
作者:M.Firouz Mohd Mustapa、Richard Harris、Jessica Mould、Nathan A.L. Chubb、Darren Schultz、Paul C. Driscoll、Alethea B. Tabor
DOI:10.1016/s0040-4039(02)01981-0
日期:2002.11
Whilst developing a strategy for the solid-phase synthesis of lanthionine-containing peptides, we became aware of some problems with a previously published route for the synthesis of orthogonally-protected lanthionine. We report a structural reassignment of the key iodoalanine intermediate and resulting lanthionine derivatives.
Studies on the synthesis of orthogonally protected azalanthionines, and of routes towards β-methyl azalanthionines, by ring opening of N-activated aziridine-2-carboxylates
作者:Keith O'Brien、Keith ó Proinsias、Fintan Kelleher
DOI:10.1016/j.tet.2014.06.011
日期:2014.8
Orthogonally protected azalanthionines were successfully synthesised by the ring-opening of N-activated aziridine-2-carboxylates with protected diaminopropanoic acids (DAPs). The required DAPs were also prepared by ring-opening of N-activated aziridine-2-carboxylates with para-methoxybenzylamine, but it was found that the choice of aziridine protecting groups dictated both the success of the reaction as well as the regioselectivity of the isolated products. Attempts to extend the methodology to the preparation of the more sterically demanding beta-methyl azalanthionines have, so far, been unsuccessful. (C) 2014 Elsevier Ltd. All rights reserved.