[CH2:1]1[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][CH:9]=2)[CH2:4][CH2:3][NH:2]1.[F-].[K+].[N+](C1C=C(S(O[CH2:26][C@@H:27]2[CH2:29][O:28]2)(=O)=O)C=CC=1)([O-])=O>C1COCC1>[O:28]1[CH2:29][C@H:27]1[CH2:26][N:2]1[CH2:3][CH2:4][C:5]2[C:10](=[CH:9][CH:8]=[CH:7][CH:6]=2)[CH2:1]1To a solution of 1,2,3,4-tetrahydroisoquinoline (10 g, 0.15 mol) in THF (100 mL) at 0° C. was added KF (22 g, 0.3 mmol). After 1 h, (S)-oxiran-2-ylmethyl 3-nitrobenzenesulfonate (21.4 g, 0.17 mmol) was added and the resulting solution was stirred at 22° C. for 16 h. The solid was removed by filtration and washed with THF. The solution was concentrated and the crude compound was used for next step without further purification (15 g, Yield 53%). LCMS (m/z): 190.1 (M+1).
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