作者:Alan R. Katritzky、Ekaterina Todadze、Parul Angrish、Bogdan Draghici
DOI:10.1021/jo0704255
日期:2007.7.1
coupling N-(Cbz- and Fmoc-α-aminoacyl)benzotriazoles with amino acids, wherein at least one of the components was sterically hindered, to provide compounds 3a−e, (3c +3 c‘), 5a−d, (5a + 5a‘), 6a−c, (6b + 6b‘), 8a−c, 9a−e, 10a−d, and (10a + 10a‘) in isolated yields of 41−95% with complete retention of chirality as evidenced by NMR and HPLC analysis. The benzotriazole activation methodology is a new route
通过将N-(Cbz-和Fmoc-α-氨基酰基)苯并三唑与氨基酸偶合,可将受阻氨基酸引入肽链,其中至少一种组分在空间上受阻,从而提供化合物3a - e(3c +3 c ' ),5a - d,(5a + 5a ' ),6a - c,(6b + 6b ' ),8a - c,9a - e,10a - d和(10a + 10a ' )NMR和HPLC分析表明,分离得到的化合物的收率为41-95%,并完全保留了手性。苯并三唑活化方法是合成位阻肽的新途径。(注意:括号内的化合物编号表示非对映异构体混合物或外消旋物;括号内的化合物编号表示对映异构体。)