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. 2019 Apr 15;27(8):1546–1561. doi: 10.1016/j.bmc.2019.02.051

Scheme 1.

Scheme 1

Reagents and conditions: (i) EtOH, r.t., o/n (ii) NaBH4, MeOH, r.t., 4 h (iii) Et3N, 2,3-dibromopropionic acid ethyl ester, toluene, 80 °C, o/n (iv) LiAlH4, THF, r.t., o/n (v) SOCl2, CH2Cl2, r.t., 48 h (vi) (a) Imidazole, K2CO3, CH3CN, 45 °C, 1 h (b) chloride 7, 70 °C, 48 h.