Lithium tri-s-butylborohydride → (3S,5R,6S)-3-Allyl-5-(3-chlorophenyl)-6-(4-chlorophenyl)-1-((2S,3S)-2-hydroxypentan-3-yl)-3-methylpiperidin-2-one

To a stirred solution of (3S,5R,6S)-3-allyl-5-(3-chlorophenyl)-6-(4-chlorophenyl)-3-methyl-1-((S)-2-oxopentan-3-yl)piperidin-2-one (185 mg, 0.40 mmol; Example 149, Step B) in THF (4 mL) under a nitrogen atmosphere at −8° C. (internal temperature) was added L-Selectride® (Aldrich, St. Louis, Mo.) (0.48 mL, 0.48 mmol, 1M solution in THF) dropwise over 2 minutes (internal temperature reached −5° C.). After 10 minutes the reaction was quenched with MeOH (0.1 mL) and treated with Oxone® (2 KHSO5.KHSO4.K2SO4, DuPont, Wilmington, Del.) (992 mg, 1.61 mmol) in water (30 mL) and then it was stirred at rt for 2 hours. After this time the reaction was partitioned between EtOAc (50 mL) and Na2S2O3 (30 mL, saturated aqueous solution). The separated organic layer was washed with brine (20 mL) and then it was dried over MgSO4, filtered and evaporated in vacuo to give the title compound. Mass Spectrum (ESI) m/z=460.0 (M+1).

1. customAfter 10 minutes the reaction was quenched with MeOH (0.1 mL)
2. additiontreated with Oxone® (2 KHSO5.KHSO4.K2SO4, DuPont, Wilmington, Del.) (992 mg, 1.61 mmol) in water (30 mL)
3. customAfter this time the reaction was partitioned between EtOAc (50 mL) and Na2S2O3 (30 mL, saturated aqueous solution)
4. washThe separated organic layer was washed with brine (20 mL)
5. dry with materialit was dried over MgSO4
6. filtrationfiltered
7. customevaporated in vacuo

ORD-Eintrag

ord-247f9eb77a584f21b4538b5ec7f5b320

Quelldatensatz

uspto-grants-2016_03

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US09296736B2