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. 2019 Aug 19;20(16):4050. doi: 10.3390/ijms20164050

Scheme 3.

Scheme 3

(i) VO(acac)2, 70% t-BuOOH (2 equivalent), dry toluene, 25 °C, 12 h, 80%; (ii) RNH2 (2 equivalent), LiClO4 (1 equivalent), MeCN, 70–80 °C, 6 h, 60–80%; (iii) 5% Pd/C, H2 (1 atm), MeOH, 25 °C, 24 h, 72%; (iv) 2% OsO4/t-BuOH, 50% NMO/H2O, acetone, 25 °C, 24 h, 40%.