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. Author manuscript; available in PMC: 2011 Jan 1.
Published in final edited form as: Tetrahedron Lett. 2010;51(13):1727–1729. doi: 10.1016/j.tetlet.2010.01.094

Scheme 3.

Scheme 3

Reagents and conditions: TBS = t-BuMe2Si; (a) TBSCl (0.2 eq), Et3N (1 eq), CH2Cl2; (b) N-hydroxyphthalimide, PPh3, DIAD, THF, 0 °C – rt, 12h; (c) 48% aq. HF, THF, 0 °C – rt, 12h; (d) CH3I, sealed tube, 60 °C, 2h; (e) H2NNH2•H2O, EtOH, rt, 12h.