作者:George R. Pettit、Jeffrey W. Holman、Gerard M. Boland
DOI:10.1039/p19960002411
日期:——
Practical total syntheses of axinastatins 2 2b and 3 2c were completed by employing Fmoc protection for the N-terminal, and tert-butyl ester blocking for the C-terminal, units of the amino acid and peptide intermediates. Generally, diethyl phosphorocyanidate proved effective for formation of the peptide bond, and in the one exception, asparagine, the o-nitrophenyl active ester proved to be useful.
通过对氨基酸和肽中间体的单元的N端采用Fmoc保护,对C端采用叔丁酯封闭,完成了抗乙酰抑制素2 2b和3 2c的实际全部合成。通常,已证明磷腈氰二乙基酯可有效地形成肽键,并且在一种例外情况下,天冬酰胺,邻硝基苯基活性酯被证明是有用的。对于最终的环化反应,发现BOP-Cl特别有效。