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【结 构 式】

【分子编号】16446

【品名】ethyl (1R,2S,4S)-2-[(formyloxy)methyl]-7-azabicyclo[2.2.1]heptane-7-carboxylate

【CA登记号】

【 分 子 式 】C11H17NO4

【 分 子 量 】227.26032

【元素组成】C 58.14% H 7.54% N 6.16% O 28.16%

与该中间体有关的原料药合成路线共 1 条

合成路线1

该中间体在本合成路线中的序号:rac-(LXXVI)

18) Ring contraction of the tropinone skeleton via a Favorskii rearrangement. Bai et al. utilized the readily available tropinone (LXXIII) as a starting material. Compound (LXXIV), which could be obtained from (LXXIII) in one step, was brominated with cupric bromide to give the monobromide (LXXV). Without separation of the two isomers, both isomers (LXXV) underwent Favorskii rearrangement to yield the expected ester (LXXVI). The key intermediate (LXXVII) was then obtained by selenation of (LXXVI) followed by selenoxide elimination. A palladium-catalyzed Heck-type coupling of (LXXVII) and 2-chloro-5-iodopyridine (LVII) furnished the exo-isomer (LXXVIII) stereoselectively in 56% yield. Conversion of (LXXVIII) to (I) was achieved by radical decarboxylation of the corresponding thiohydroxamic ester followed by cleavage of the carbamate with iodotrimethyl silane.

1 Bai, D.; Xu, R.; Zhu, X.; Epibatidine. Drugs Fut 1997, 22, 11, 1210.
2 Xu, R.; Chu, G.; Bai, D.; Total synthesis of (±)-epibatidine. Tetrahedron Lett 1996, 37, 1463-6.
3 Bai, D.; Xu, R.; Chu, G.; Zhu, X.; Synthesis of (±)-epibatidine and its analogues. J Org Chem 1996, 61, 4600-6.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
rac-(LXXXIII) 16443 (1R,5S)-8-methyl-8-azabicyclo[3.2.1]octan-3-one C8H13NO 详情 详情
rac-(LXXIV) 16444 ethyl (1R,5S)-3-oxo-8-azabicyclo[3.2.1]octane-8-carboxylate 32499-64-2 C10H15NO3 详情 详情
rac-(LXXV) 16445 ethyl (1R,5S)-2-bromo-3-oxo-8-azabicyclo[3.2.1]octane-8-carboxylate C10H14BrNO3 详情 详情
rac-(LXXVI) 16446 ethyl (1R,2S,4S)-2-[(formyloxy)methyl]-7-azabicyclo[2.2.1]heptane-7-carboxylate C11H17NO4 详情 详情
rac-(LXXVII) 16447 7-ethyl 2-methyl (1S,4R)-7-azabicyclo[2.2.1]hept-2-ene-2,7-dicarboxylate C11H15NO4 详情 详情
rac-(LXXVIII) 16448 ethyl (1R,2R,3S,4S)-2-(6-chloro-3-pyridinyl)-3-[(formyloxy)methyl]-7-azabicyclo[2.2.1]heptane-7-carboxylate C16H19ClN2O4 详情 详情
Extended Information