Synthesis of 3,6-diethoxycarbonyl-3,6-epidithia-1,4-dimethyl-2,5-piperazinedione and related compounds. Formation of C-S bond by the reaction of carbanion and sulfur monochloride.
作者:TOHRU HINO、TADAO SATO
DOI:10.1248/cpb.22.2866
日期:——
Reaction of 3, 6-diethoxycarbonyl-1, 4-dimethyl-2, 5-piperazinedione (15), prepared by heating of diethyl methylaminomalonate (14), with NaH in dioxane and followed treatment with S2Cl2 gave 3, 6-epidithio- and 3, 6-epitetrathio-3, 6-diethoxycarbonyl-1, 4-dimethyl-2, 5-piperazinediones (16b and 16d), which have the skeletone (1) observed in fungal metabolites such as sporidesmin. The reduction of 16 with NaBH4 in methanol gave the dethio derivative (15) in good yield. The reaction of 16d with triphenylphosphine in tetrahydrofurane gave 16c and 16b. The reaction of diethyl malonate derivatives (23a, b, and c) with NaH and S2Cl2 in dioxane gave the corresponding disulfides or trisulfides (24a, b, and c). Some reactions of proline anhydride (5) and sarcosine anhydride (7) with S2Cl2 or sulfur were examined.
通过加热甲氨基丙二酸二乙酯(14)制备的 3,6-二乙氧基羰基-1,4-二甲基-2,5-哌嗪二酮(15)在二噁烷中与 NaH 反应,然后用 S2Cl2 处理,得到 3,6-环二硫代和 3,6-环四硫代-3,6-二乙氧基羰基-1,4-二甲基-2,5-哌嗪二酮(16b 和 16d)、6-epidithio- 和 3,6-epitetrathio-3,6-diethoxycarbonyl-1,4-dimethyl-2,5-piperazinediones(16b 和 16d)。用 NaBH4 在甲醇中还原 16,可以得到产率很高的去硫代衍生物(15)。16d 与三苯基膦在四氢呋喃中反应,得到 16c 和 16b。丙二酸二乙酯衍生物(23a、b 和 c)与 NaH 和 S2Cl2 在二噁烷中反应,得到相应的二硫化物或三硫化物(24a、b 和 c)。还研究了脯氨酸酐(5)和肌氨酸酐(7)与 S2Cl2 或硫的一些反应。