Synthese d'une pyridazine d'interet therapeutique, marquee au carbone 14: Dichlorhydrate de morpholinoethylamino-3 methyl-4 phenyl-6 pyridazine 14C-6 (30,038 CB)
作者:L. Pichat、J. P. Beaucourt、F. Krausz、C. Moulineau
DOI:10.1002/jlcr.2580120303
日期:1976.7
Benzoyl chloride-714C is condensed with tris(trimethylsilyl) 1-lithio-1,1,2 propane tricarboxylate, which after hydrolysis gives rise to a 66% yield of 2-methyl-3-(benzoyl-7-14C) propionic acid. After cyclisation with hydrazine, followed by treatment with bromine in acetic acid, 3-hydroxy-4-methyl-6-phenyl pyndazine 6-14C is secured in a 77% yield. This hydroxypyridazine treated with POCl3 gave a 90% yield of 90 % pure 4-methyl-6-phenyl-3-chloropyndazine 6-14C; The latter treated with 2-morpholino-1-aminoethane in presence of sodium iodide has given 3-morpholinoethylamino 4-methyl 6-phenylpyndazine 6-14C. The overall yield based on barium carbonate 14C is 16.7 % (specific activity 18.5 mCi/mMole).
苯甲酰氯-714C 与 1-二硫代-1,1,2-丙烷三羧酸三(三甲基硅基)酯缩合,水解后生成 2-甲基-3-(苯甲酰基-7-14C)丙酸,产率为 66%。用肼环化后,再用溴在乙酸中处理,可得到 3-羟基-4-甲基-6-苯基哒嗪 6-14C,收率为 77%。用 POCl3 处理这种羟基哒嗪,可以得到 90% 纯度的 4-甲基-6-苯基-3-氯哒嗪 6-14C;后者在碘化钠存在下用 2-吗啉基-1-氨基乙烷处理,可以得到 3-吗啉基乙基氨基 4-甲基 6-苯基哒嗪 6-14C。碳酸钡 14C 的总收率为 16.7%(比活度为 18.5 mCi/mMole)。