Synthesis of N-(3-azido-4-chlorophenyl)-N′-[3H-methyl] thiourea, an efficient photoaffinity probe for the urea carrier
作者:Herve Lamotte、Francoise Degeilh、Philippe Neau、Pierre Ripochet、Bernard Rousseau
DOI:10.1002/jlcr.2580340312
日期:1994.3
Starting from commercial 4-chloro-3-nitroaniline, through a 5 step synthesis, was prepared 3-azido-4-chlorophenylisothiocyanate 5 which was reacted with [3H]-methylamine. The latter was obtained by three methods: i- [3H]-LiAlT4 reduction of benzylcarbamate gave rise to [3H]-methylamine (S.A.: >70 Ci/mmol). ii- Catalytic reduction of HCN with 3H2 lead to [3H]-CH3NH2 (S.A.: 0.7 Ci/mmol). iii- Schmidt rearrangement of [3H]-sodium acetate gave [3H]-CH3NH2 (S.A.: 29 Ci/mmol). Compound 7 at the highest specific activity had a self radiolysis rate precluding its practical use in biological studies whilst 29 Ci/mmol [3H]-7 was satisfactory.
从商用 4-氯-3-硝基苯胺开始,经过 5 个步骤的合成,制备出 3-叠氮-4-氯苯基异硫氰酸酯 5,并与 [3H]- 甲胺反应。后者通过三种方法获得:i- [3H]-LiAlT4 还原氨基甲酸苄酯,得到 [3H]- 甲胺(S.A. :>70 Ci/mmol)。 ii- HCN 与 3H2 的催化还原生成 [3H]-CH3NH2(S.A. :0.7 Ci/mmol)。 iii- [3H]- 乙酸钠的施密特重排生成 [3H]-CH3NH2(S.A. :29 Ci/mmol)。 比活度最高的化合物 7 的自身放射性分解率使其无法实际用于生物研究,而 29 Ci/mmol [3H]-7 的比活度则令人满意。