The radiolabeled non-natural amino acid 1-amino-3-cyclobutane-1-carboxylic acid (ACBC) and its analogs are candidate tumor imaging agents useful for positron emission tomography and single photon emission computed tomography due to their selective affinity for tumor cells. The present invention provides methods for stereo-selective synthesis of syn-ACBC analogs. The disclosed synthetic strategy is reliable and efficient and can be used to synthesize a gram quantity of various syn-isomers of the ACBC analogs, particularly, syn-[
18
F]-1-amino-3-fluorocyclobutane-1-carboxylic acid (FACBC) and syn-[
123
I]-1-amino-3-iodocyclobutane-1-carboxylic (IACBC) acid analogs.
标记放射性非天然
氨基酸1-
氨基-3-
环丁烷-1-
羧酸(ACBC)及其类似物是候选的肿瘤成像试剂,适用于正电子发射断层扫描和单光子发射计算机断层扫描,因为它们具有对肿瘤细胞的选择性亲和力。本发明提供了一种立体选择性合成syn-ACBC类似物的方法。所披露的合成策略可靠高效,可用于合成各种ACBC类似物的克量,尤其是syn-[18F]-
1-氨基-3-氟环丁烷-1-羧酸(FACBC)和syn-[123I]-1-
氨基-3-
碘环丁烷-1-
羧酸(IACBC)类似物。