Triethylamine → HCID 68600866、化合物

反応式

FC(F)(F)C(O)=O.[CH2:8]([O:15][C:16](=[O:22])[NH:17][CH:18]1[CH2:21][NH:20][CH2:19]1)[C:9]1[CH:14]=[CH:13][CH:12]=[CH:11][CH:10]=1.C(N(CC)CC)C.Cl[C:31]([O:33][CH2:34][CH2:35][CH2:36][CH3:37])=[O:32]>C(Cl)Cl>[CH2:34]([O:33][C:31]([N:20]1[CH2:21][CH:18]([NH:17][C:16]([O:15][CH2:8][C:9]2[CH:14]=[CH:13][CH:12]=[CH:11][CH:10]=2)=[O:22])[CH2:19]1)=[O:32])[CH2:35][CH2:36][CH3:37]

参加物

反応条件

温度: 0 °C

実験手順

To a solution of 2 g of Azetidin-3-yl-carbamic acid benzyl ester trifluoroacetate (prepared by standard protection and deprotection procedures from 3-Amino-azetidine-1-carboxylic acid tert-butyl ester) in 10 ml of DCM, 1.9 g of triethylamine was added and the mixture was cooled to 0° C. Then, 938 mg of butyl chloroformate was slowly added. After the addition was completed the reaction mixture was allowed to warm to RT and to stir for 1 h. Then, 200 ml of DCM was added and the organic phase was washed two times with 0.1M aqueous hydrochloric acid and the with saturated aqueous sodium hydrogen carbonate solution. The organic phase was dried over MgSO4 and the solvents were removed under reduced pressure. The crude product was purified by chromatography on silica gel eluting with a gradient of n-heptane/ethyl acetate. The fractions containing the product were combined and the solvent evaporated under reduced pressure. Yield: 1.4 g.