反应详情

This compound was prepared in 81% yield from the ester 4b (9.28 g, 40 mmol) by reduction with lithium borohydride in dry DME following the procedure that has been described earlier1,2. TLC Rf 0.47 (eluent MeOH/CHCl3,7/93). 1H NMR (CDCl3) δ 0.91 and 0.98 (dd, J=2 Hz, 6H, CH3CHCH3), 1.44 (s, 9H, t-Bu), 1.45-1.97 (m, 1H, CH3CHCH3), 2.15 (s, 1H, OH), 3.24-3.49 (m, 1H, CHCH2), 3.53-3.72 (m, 2H, CH2OH), 4.36-4.77 (m, 1H, NH). CI MS, m/e 204 (M+ +1).