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The title compound was prepared following the general procedure 10, starting from 4-cyanobenzyl bromide and tert-butyl glycinate. It was isolated as a colorless oil. 1H NMR (DMSO-d6, 300 MHz) δ 7.78 (d, J=8.3 Hz, 2H), 7.52 (d, J=8.3 Hz, 2H), 3.79 (s, 2H), 3.19 (s, 2H), 2.60 (br s, 1H), 1.41 (s, 9H). HPLC (Method A) Rt 2.17 min (Purity: 97.2%).

1. customIt was isolated as a colorless oil