Direct amidation of unprotected amino acids using B(OCH<sub>2</sub>CF<sub>3</sub>)<sub>3</sub>
作者:Rachel M. Lanigan、Valerija Karaluka、Marco T. Sabatini、Pavel Starkov、Matthew Badland、Lee Boulton、Tom D. Sheppard
DOI:10.1039/c6cc05147b
日期:——
A commercially available borate ester, B(OCH2CF3)3, can be used to achieve protecting-group free direct amidation of [small alpha]-amino acids with a range of amines in cyclopentyl methyl ether. The method can...
Peptide Bond Formation of Amino Acids by Transient Masking with Silylating Reagents
作者:Wataru Muramatsu、Hisashi Yamamoto
DOI:10.1021/jacs.1c02600
日期:2021.5.12
A one-pot peptide bond-forming reaction has been developed using unprotected amino acids and peptides. Two different silylating reagents, HSi[OCH(CF3)2]3 and MTBSTFA, are instrumental for the successful implementation of this approach, being used for the activation and transient masking of unprotected amino acids and peptides at C-termini and N-termini, respectively. Furthermore, CsF and imidazole
Organocatalytic Activation of Inert Hydrosilane for Peptide Bond Formation
作者:Wataru Muramatsu、Hisashi Yamamoto
DOI:10.1021/acs.orglett.2c02947
日期:2022.10.7
describe the development of a reliable catalytic protocol for peptidebondformation that is generally applicable to natural and unnatural α-amino acids, β-amino acids, and peptides bearing various functional groups. A 10 mol % loading of HSi[OCH(CF3)2]3 as a catalyst was sufficient to guarantee a consistently high yield of the resulting peptide. This method facilitates the sustainable utilization of natural