Direct N-alkylation of unprotected amino acids with alcohols.
Direct N-alkylation of unprotected amino acids with alcohols.
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DOI:
10.1126/sciadv.aao6494
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发表时间:
2017-12
期刊:
影响因子:
13.6
通讯作者:
Barta K
中科院分区:
文献类型:
--
作者:
Yan T;Feringa BL;Barta K
We present a method for N-alkylation of unprotected amino acids with alcohols with excellent yield and stereochemistry retention. N-alkyl amino acids find widespread application as highly valuable, renewable building blocks. However, traditional synthesis methodologies to obtain these suffer from serious limitations, providing a major challenge to develop sustainable alternatives. We report the first powerful catalytic strategy for the direct N-alkylation of unprotected α-amino acids with alcohols. This method is highly selective, produces water as the only side product leading to a simple purification procedure, and a variety of α-amino acids are mono- or di-N-alkylated, in most cases with excellent retention of optical purity. The hydrophobicity of the products is tunable, and even simple peptides are selectively alkylated. An iron-catalyzed route to mono-N-alkyl amino acids using renewable fatty alcohols is also described that represents an ideal green transformation for obtaining fully bio-based surfactants.
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