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. Author manuscript; available in PMC: 2008 Aug 26.
Published in final edited form as: J Org Chem. 2005 Dec 23;70(26):10645–10652. doi: 10.1021/jo051212n

Scheme 7.

Scheme 7

aReagents and conditions: (a) isopropenyl acetate; (b) Oxone, acetone; (c) bis(trimethylsilyl)neopentyl glycol, TMSOTf, CH2Cl2, 0 °C → rt; (d) H2, 10% Pd/C; (e) HN3, PPh3, DEAD, PhH, 0 °C → rt.