Amino-acids and peptides. Part 45. The protection of the thiol function of cysteine and the imidazole-N of histidine by the diphenyl-4-pyridylmethyl group
作者:Susan Coyle、Allan Hallett、Michael S. Munns、Geoffrey T. Young
DOI:10.1039/p19810000522
日期:——
group, this protection is stable in acid but it is cleaved readily by zinc–acetic acid, by mercury(II) acetate, by iodine, and by electrolytic reduction. N(lm)-Diphenyl-4-pyridylmethyl-L-histidine derivatives (9)–(13) are also reported; the protecting group is again stable to acid but cleaved by hydrogenolysis, by zinc–acetic acid, and by electrolytic reduction, and it has been used in the synthesis
S-(二苯基-4-吡啶基甲基)-L-半胱氨酸(1)及其衍生物(2)-(7)已制备并用于肽合成。与类似的S-三苯甲基相反,这种保护在酸中是稳定的,但是很容易被锌-乙酸,乙酸汞(II),碘和电解还原裂解。还报道了N(lm)-二苯基-4-吡啶基甲基-L-组氨酸衍生物(9)-(13);该保护基对酸仍然稳定,但可通过氢解,锌-乙酸和电解还原裂解,并已用于合成L-组氨酸-L-亮氨酸,-L-苯丙氨酸和-甘氨酸。