作者:Kiran Bajaj、Girinath G. Pillai、Rajeev Sakhuja、Dalip Kumar
DOI:10.1021/acs.joc.0c01319
日期:2020.10.2
A smooth traceless ligation strategy using an air-stable phosphane probe (2-(diphenylphosphanyl)phenyl)methanol as a C-terminus activator has been demonstrated at simple and sterically hindered amino acid junctions (Gly, Ala, Trp, Glu). This Staudinger peptide ligation proceeds via formation of a seven-membered transition state to afford di-, tetra-, and pentapeptides in 78–95% yields. The experimental
在简单且空间受阻的氨基酸连接处(Gly,Ala,Trp,Glu)已证明使用空气稳定的膦探针(2-(二苯基膦基)苯基)甲醇作为C末端活化剂的平稳无痕连接策略。这种Staudinger肽的连接通过形成七元过渡态而进行,以78%至95%的产率提供二,四和五肽。通过计算计算,从理论上研究了Gly连接处的连接和Glu连接处的区域选择性连接的实验结果。这些发现建立了我们合成的膦探针用于Staudinger肽连接的通用行为,以合成所选的肽和蛋白质。