Route to the tritiation of carbon atom-9 of carcinogenic fluorenylhydroxamic acids
作者:H. R. Gutmann、P. Bell
DOI:10.1002/jlcr.2590100210
日期:1974.4
The selective tritiation of the methylene carbon atom of the carcinogens, N-fluoren-3-yl-and N-fluoren-1-ylacetohydroxamic acid, has been investigated. The synthesis of N-[9-3H]fluoren-3-ylacetohhydroxamic acid involves hydrogenolysis of 3-aminofluoren-9-one to [9-3]fluoren-3-amine with LiAl3H4-A1C1-. The tritiated amine is oxidized to 3-nitro-[9-3H]fluorene with m-chloroperoxybenzoic and the labeled nitro compound is partially hydrogenated to the 3H-hydroxamic acid with 10% Pd–C catalyst in presence of acetic anhydride and triethylamine or dimethylaniline. N-[9-3H]fluoren-1-ylacetohydroxamic acid may be obtained from 1-aminofluoren-9-one by the same procedure. However, N-[9-3H]fluoren-2-ylacetohydroxamic acid cannot be prepared in this way because reduction of 2-aminofluoren-9-one with LiA1H4-A1C13 does not proceed beyond the alcohol, 2-aminofluoren-9-ol.
研究人员对致癌物质 N-芴-3-基和 N-芴-1-基乙酰氧肟酸的亚甲基碳原子进行了选择性三氚化。N-[9-3H]fluoren-3-ylacetohhydroxamic acid(N-[9-3H]芴-3-基乙酰氧肟酸)的合成过程包括用 LiAl3H4-A1C1- 将 3-aminofluoren-9-one 加氢分解成 [9-3]fluoren-3-amine 。三价胺用间氯过氧苯甲酸氧化成 3-硝基-[9-3H]芴,标记的硝基化合物在醋酸酐和三乙胺或二甲基苯胺存在下,用 10% Pd-C 催化剂部分氢化成 3H- 羟肟酸。N-[9-3H]fluoren-1-ylacetydroxamic acid(N-[9-3H]芴-1-基乙酰羟肟酸)可以通过相同的步骤从 1-氨基芴-9-酮中获得。但是,N-[9-3H]芴-2-基乙酰羟肟酸不能用这种方法制备,因为用 LiA1H4-A1C13 还原 2-氨基芴-9-酮时,不会生成醇类 2-氨基芴-9-醇。