[F:1][C:2]1([F:11])[CH2:7][CH2:6][CH:5](C(O)=O)[CH2:4][CH2:3]1.C1C=CC(OP([O:24][C:25]2C=CC=CC=2)(N=[N+]=[N-])=O)=CC=1.C([N:33](CC)CC)C>C1(C)C=CC=CC=1>[F:11][C:2]1([F:1])[CH2:3][CH2:4][CH:5]([N:33]=[C:25]=[O:24])[CH2:6][CH2:7]1A mixture of 4,4-difluorocyclohexanecarboxylic acid (0.20 g, 1.2 mmol) (Matrix Scientific, Cat. #018320), diphenylphosphonic azide (0.67 g, 2.4 mmol) (Aldrich, Cat. #178756) and triethylamine (0.51 mL, 3.6 mmol) in toluene (10 mL) was refluxed overnight. The volatiles were removed under reduced pressure to afford the product which was directly used for next step reaction without further purification.
Wird geladen…