Amino acids are important nitrogen-containing chemicals that have a variety of applications.Currently,fermentation is the widely employed method to produce amino acids;however,the products are mostly limited to natura...Amino acids are important nitrogen-containing chemicals that have a variety of applications.Currently,fermentation is the widely employed method to produce amino acids;however,the products are mostly limited to natural amino acids in the L-configuration.Catalytic synthesis is an alternative approach for the synthesis of amino acids with different types and configurations,where the use of renewable biomass-based feedstocks is highly attractive.To date,several lignocellulose and triacylglycerol-derived intermediates,typicallyα-keto acids andα-hydroxyl acids,have been transformed into amino acids via the amination reaction in the presence of additional nitrogen sources(i.e.,NH3·H2O).Making full use of inherent nitrogen in biomass(i.e.,chitin and protein)to produce amino acids avoids the use of extra nitrogen sources and meets the requirements of green chemistry,which is attracting increasing attention.In this review,we summarize different chemical-catalytic systems for the transformation of biomass to amino acids.An outlook on the challenges and opportunities for more effective production of amino acids from biomass by catalytic methods is provided.展开更多
基金The authors gratefully acknowledge the support of Natural Science Foundation of Chongqing(Grant Nos.cstc2020jcyj-msxmX0672,cstc2020jcyj-msxmX0839)the Science and Technology Research Program of Chongqing Municipal Education Commission(Grant No.KJQN202000826)+1 种基金Start-up Foundation of High-level Talents(Grant No.1956037)in Chongqing Technology and Business University,and Key Disciplines of Chemical Engineering and Technology in Chongqing Colleges and Universities during the 13th Five Year Plan(Grant No.950619013)The support from HKBU(RC-SGT2/19-20/SCI/009)is also appreciated.
文摘Amino acids are important nitrogen-containing chemicals that have a variety of applications.Currently,fermentation is the widely employed method to produce amino acids;however,the products are mostly limited to natural amino acids in the L-configuration.Catalytic synthesis is an alternative approach for the synthesis of amino acids with different types and configurations,where the use of renewable biomass-based feedstocks is highly attractive.To date,several lignocellulose and triacylglycerol-derived intermediates,typicallyα-keto acids andα-hydroxyl acids,have been transformed into amino acids via the amination reaction in the presence of additional nitrogen sources(i.e.,NH3·H2O).Making full use of inherent nitrogen in biomass(i.e.,chitin and protein)to produce amino acids avoids the use of extra nitrogen sources and meets the requirements of green chemistry,which is attracting increasing attention.In this review,we summarize different chemical-catalytic systems for the transformation of biomass to amino acids.An outlook on the challenges and opportunities for more effective production of amino acids from biomass by catalytic methods is provided.
