Boc-L-Pro-Ome → (2S)-(1-tert-Butoxycarbonyl-2-pyrrolidinyl)2,8-bis(trifluoromethyl)quinolin-4-yl Methanone

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Reaction Steps

This was prepared from 4-bromo-2,8-bis(trifluoromethyl)quinoline by the method of example 31 using (S)-N-tert-butoxycarbonylproline methyl ester in place of N-diphenylmethyl-3-azetidinone and the product (1.32 g, 29%) isolated as a cream solid: IR νmax (Nujol)/cm−1 2979, 2883, 1748, 1698, 1401, 1368, 1312, 1160 and 1110; NMR δH (400 CDCl3) (mixture of 2 rotamers) 1.41 and 1.45 (9H, 2×s), 1.79-2.13 (3H, m), 2.11-2.31 (1H, m), 3.32-3.70 (2H, m), 5.09 and 5.16 (1H, 2×dd, J 8.8, 4.3 and J 9.0, 5.5 Hz), 7.78-7.83 (1H, m), 8.03 and 8.04 (1H, 2×s), 8.18-8.29 (1H, m), 8.41 and 8.51 (1H, 2×d, J 8.5 and J 8.5 Hz).

Provenance & Evidence