The S-1-adamantyl (Ad) group of cysteine is more stable to TFA treatment than the S-p-methoxybenzyl (MBzl) group, but is cleavable by 1 M trifluoromethanesulfonic acid-thioanisole in trifluoroacetic acid at 0°C within 60 min or by (CF3COO)3 Tl under similar conditions. S-Ad-cysteine is less susceptible to sulfoxide formation than the S-MBzl group. Trimethylphenyl-thiosilane is an effective reducing reagent of the sulfoxide.
与 S-对甲氧基苄基(MBzl)相比,半胱
氨酸的 S-1-
金刚烷基(Ad)对反式
脂肪酸处理更稳定,但可在 60 分钟内被 0°C
三氟乙酸中的 1 M
三氟甲磺酸-
硫代
苯甲醚裂解,或在类似条件下被 (CF3COO)3 Tl 裂解。与 S-MBzl 基团相比,S-Ad-半胱
氨酸不易形成亚砜。三甲基苯基
硫代
硅烷是一种有效的亚砜还原试剂。