作者:G. Prota、E. Ponsiglione
DOI:10.1016/0040-4020(73)80269-8
日期:1973.12
the compound described in the literature as 2,3,9,9a-tetrahydro-9a-hydroxy-9-oxo-indeno[2.1]-p-thiazine-3-car☐ylic acid (1), which is formed in the reaction of ninhydrin with L-cysteine, has in fact the isomeric spirane structure (4). Cysteine analogues, such as 3-mercapto-valine and 2-aminoethanethiol, react similarly to give the corresponding condensation products (7 and8).
化学和光谱学证据得出的结论是,该文献中描述的化合物为2,3,9,9a-四氢-9a-羟基-9-氧代茚并[2.1]-对-噻嗪-3-car☐羟基酸(实际上,在茚三酮与L-半胱氨酸反应中形成的1)具有异构体螺烷结构(4)。半胱氨酸类似物,例如3-巯基缬氨酸和2-氨基乙硫醇,类似地反应生成相应的缩合产物(7和8)。