Yield:-

Steps:

Multi-step reaction with 6 steps
1: NaHCO₃ / methanol / 16 h / 60 °C
2: NaIO₄ / tetrahydrofuran; H₂O / 2 h / 20 °C
3: 27 g / NaBH₄ / methanol / 0.5 h / 0 °C
4: 79 percent / 1st generation Grubbs catalyst / CH₂Cl₂ / 16 h / 20 °C
5: H₂ / PtO₂*H₂O / ethyl acetate / 16 h / 2250.23 Torr
6: 63 percent / NaClO; NaClO₂; sodoum phosphate buffer / TEMPO; bleach / acetonitrile; H₂O / 18 h / 35 °C / pH 6.7

References:

Alegret, Carlos;Santacana, Ferran;Riera, Antoni [Journal of Organic Chemistry,2007,vol. 72,# 20,p. 7688 - 7692]