Fluorine-18 labeled progestin ketals: synthesis and target tissue uptake selectivity of potential imaging agents for receptor-positive breast tumors
作者:Monica J. Kochanny、Henry F. VanBrocklin、Philip R. Kym、Kathryn E. Carlson、James P. O'Neil、Thomas A. Bonasera、Michael J. Welch、John A. Katzenellenbogen
DOI:10.1021/jm00061a002
日期:1993.4
fluorine-substituted progestins as potential imaging agents for progesterone-receptor-positive human breast tumors. The steroids are 16 alpha, 17 alpha-fluoroacetophenone ketals of 16 alpha, 17 alpha-dihydroxyprogesterone and 16 alpha, 17 alpha, 21-trihydroxy-19-norprogesterone. Synthesis of the latter compound in seven steps from 19-norandrost-4-ene-3,17-dione is reported. Both compounds demonstrate high affinity
我们已经研究了两种新的氟取代孕激素作为孕激素受体阳性人类乳腺肿瘤的潜在显像剂。类固醇是16α,17α-二羟基孕酮和16α,17α,21-三羟基-19-正孕酮的16α,17α-氟苯乙酮缩酮。据报道,后者的化合物由19-norandrost-4-ene-3,17-dione分七个步骤合成。两种化合物均对孕酮受体(PgR)表现出高度亲和力(相对于R5020 = 100,分别为52.5和240%)。该合成物适合于用4'-[18F]-氟苯乙酮进行18F-标记,所述4'-[18F]-氟苯乙酮是通过用K18F / Kryptofix亲核取代由4'-硝基苯乙酮制备的。需要使用痕量的酮对反应条件进行相当大的调节以实现缩酮化。在雌激素引发的未成年雌性大鼠的组织分布研究中,两种缩酮均显示选择性的子宫摄取,这是通过共注射饱和剂量的未标记孕激素ORG 2058来阻止的。此外,放射性标记物的代谢稳定性表现为低放射性水