title: Aporphines. 58. N-(2-chloroethyl) [8,9-2H]norapomorphine, an irreversible ligand for dopamine receptors: synthesis and application.
abstract: The synthesis of the title compounds (1c and its 2H isomer 1b) from N-(2-hydroxyethyl)norapomorphine was carried out by ring bromination, followed by chlorination to the 2-chloroethyl compound 6. Further reduction with 2H2 or 3H2 and Pd/C gave 1b or 1c. Radiochemically pure (97%) 1c was obtained with a specific activity of 16.3 Ci/mmol. The purity of 1c was determined by LC, HPLC, UV, and NMR. [3H]NCA was shown to label the D2 receptor; however, the D2 signal appears to be only a small portion of the total signal, which may include binding to other dopamine receptor subtypes (D1 and D3).
mesh_terms: D000818:Animals; D001060:Aporphines / Q000138:chemical synthesis* / Q000378:metabolism; D001667:Binding, Competitive; D003342:Corpus Striatum / Q000378:metabolism; D004285:Dogs; D010903:Pituitary Gland, Anterior / Q000378:metabolism; D011954:Receptors, Dopamine / Q000378:metabolism*; D013134:Spiperone / Q000378:metabolism; D013552:Swine
chemical_list: D001060:Aporphines; D011954:Receptors, Dopamine; D013134:Spiperone; C025935:chloroethylnorapomorphine