反应详情

Step M (1): Same procedure as Step I (1). (S)-Methyl 2-(methylamino)hex-5-enoate hydrochloride from Step K (2) was sulfonylated with 3,3,3-trifluoropropane-1-sulfonyl chloride according to the procedure outlined in Step I (1). The procedure provided 242 mg (56% yield) of (S)-methyl 2-(3,3,3-trifluoro-N-methylpropylsulfonamido)hex-5-enoate. LC-MS (M+H)+=318.3; 1H NMR (500 MHz, CDCl3) δ ppm 1.73-1.85 (m, 1H) 2.02-2.21 (m, 3H) 2.59-2.73 (m, 2H) 2.87 (s, 3H) 3.16-3.32 (m, 2H) 3.76 (s, 3H) 4.55 (dd, J=10.68, 4.58 Hz, 1H) 4.99-5.14 (m, 2H) 5.74-5.87 (m, 1H).