[OH:1][N:2]=[C:3](Cl)[CH:4]1[CH2:11][CH2:10][CH2:9][CH2:8][C:5]21[CH2:7][CH2:6]2.[CH:13]1([C:16](=O)[CH2:17][C:18]([O:20]C)=[O:19])[CH2:15][CH2:14]1>>[CH:13]1([C:16]2[O:1][N:2]=[C:3]([CH:4]3[CH2:11][CH2:10][CH2:9][CH2:8][C:5]43[CH2:7][CH2:6]4)[C:17]=2[C:18]([OH:20])=[O:19])[CH2:15][CH2:14]15-Cyclopropyl-3-(spiro[2.5]octan-4-yl)isoxazole-4-carboxylic acid (I-11K) was prepared from N-hydroxyspiro[2.5]octane-4-carbimidoyl chloride and methyl 3-cyclopropyl-3-oxopropanoate following the same protocol as described for I-6E. MS m/z 262.1 (M+1).
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