Reaktion #7965

Reaktionsgleichung

(2SR,9aSR)-2-allyl-9a-butyl-7-methoxymethoxy-4-methyl-1,2,9,9a-tetrahydro-3H-fluoren-3-one

dioxane

→

(2RS,9aSR)-9a-butyl-2-(3-hydroxy-2-oxopropyl)-7-methoxymethoxy-4-methyl-1,2,9,9a-tetrahydro-3H-fluoren-3-one

Lösungsmittel

water

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.ADDITIONtreated with a single crystal of OSO4
2. 2
   workup.STIRRINGstirred an additional 30 minutes at room temperature
3. 3
   SonstigeWorkup provided a gum which
4. 4
   Sonstigewas purified by PLC on two 0.1×20×20 cm silica gel GF plates

Vorschrift

A solution of (2SR,9aSR)-2-allyl-9a-butyl-7-methoxymethoxy-4-methyl-1,2,9,9a-tetrahydro-3H-fluoren-3-one (170 mg, 0.48 mmol) in dioxane (9 mL) was diluted with water (3 mL) and treated with a single crystal of OSO4 followed by NaIO4 (125 mg, 0.58 mmol). The mixture was stirred at room temperature for 15 minutes, treated with more NaIO4 (132 mg, 0.62 mmol), and stirred an additional 30 minutes at room temperature. Workup provided a gum which was purified by PLC on two 0.1×20×20 cm silica gel GF plates, developing twice with 4:1 hexanes-EtOAc. The minor UV visible band provided (2RS,9aSR)-9a-butyl-2-(3-hydroxy-2-oxopropyl)-7-methoxymethoxy-4-methyl-1,2,9,9a-tetrahydro-3H-fluoren-3-one (26 mg) as an oil. The major UV visible band afforded (2RS,9aSR)-9a-butyl-7-methoxymethoxy-4-methyl-2-(2-oxoethyl)-1,2,9,9a-tetrahydro-3H-fluoren-3-one (85 mg) as an oil.

Quelle