D-Leucine, methyl ester → (R)-methyl 4-methyl-2-(5-methylbenzofuran-2-carboxamido)pentanoate

Participants

Reaction Steps

Prepared in a similar manner to example 4 using 5-methylbenzofuran-2-carboxylic acid (example 26a) and D-leucine methyl ester. 1H NMR (500 MHz, CDCl3): δ0.98 (d, 3H, J=6.26 Hz), 1.00 (d, 3H, J=6.17 Hz), 1.56 (s, 3H), 1.76 (m, 3H), 2.48 (s, 3H), 3.78 (s, 3H), 4.86 (m, 1H), 6.95 (m, 1H), 7.23 (dd, 1H, J=8.54 Hz, J=1.55 Hz), 7.40 (m, 2H). 7.44 (dd, 1H, J=1.72, J=0.9 Hz). MS 304 (M+H, 304).

Provenance & Evidence