No-carrier-added (NCA) synthesis of 6-[18F]fluoro-L-DOPA using 3,5,6,7,8,8a-hexahydro-7,7,8a-trimethyl-[6s-(6α,8α,8αβ)]-6,8-methano-2H-1,4-benzoxazin-2-one
作者:Andrew Horti、D. Eugene Redmond、Robert Soufer
DOI:10.1002/jlcr.2580360503
日期:1995.5
8a-trimethyl-[6S-(6α,8α,8αβ)]-6,8-methano-2H-1,4-benzoxazino-2-one (2) was investigated as chiral auxiliary for asymmetric NCA nucleophilic synthesis of 6-[ 18 F]Fluoro-L-DOPA. Direct condensation of 3,4-dimethoxy-2-[ 18 F]fluorobenzaldehyde (1a) or 6-[ 18 F]fluoropiperonal (1b) in the presence of NaH with 2 gave the corresponding [ 18 F]-3-[(2-fluorophenyl)methylene]-3,5,6,7,8,8a-hexahydro-7,7,8a-trimethyl-[6S-(3Z
3,5,6,7,8,8a-Hexahydro-7,7,8a-trimethyl-[6S-(6α,8α,8αβ)]-6,8-methano-2H-1,4-benzoxazino-2-一 (2) 被研究作为 6-[ 18 F] 氟-L-DOPA 的不对称 NCA 亲核合成的手性助剂。3,4-二甲氧基-2-[ 18 F] 氟苯甲醛 (1a) 或 6-[ 18 F] 氟胡椒醛 (1b) 在 NaH 存在下与 2 直接缩合得到相应的 [ 18 F]-3-[(2 -氟苯基)亚甲基]-3,5,6,7,8,8a-六氢-7,7,8a-三甲基-[6S-(3Z,3α,6α,8α,8αβ)]-6,8-methano- 2H-1,4-benzoxazin-2-one 衍生物 3a 或 3b 作为单一立体异构体。L-Selectride® 在叔丁醇存在下促进这些衍生物的烯属双键的氢化,得到相应的 [ 18 F]-3-[(2-氟苯基)甲基]-3