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. Author manuscript; available in PMC: 2020 Aug 30.
Published in final edited form as: ACS Infect Dis. 2020 Apr 20;6(5):922–929. doi: 10.1021/acsinfecdis.9b00524

Scheme 2.

Scheme 2

Reagents and conditions: (a) alkyl halide, NaH or K2CO3, DMF, 0 °C to rt, 18 h, 76–94%; (b) SOCl2, Et3N, DCM, rt, 3 h, 80–93%; (c) Cs2CO3, MeCN, rt, 4–18 h, 39–75%; (d) TBAF, THF, rt, 16 h, 84%.