[2H]C1C([2H])=C([2H])C(B(O)O)=C([2H])C=1[2H].C1C=CC(P(C2C(C3C(P(C4C=CC=CC=4)C4C=CC=CC=4)=CC=C4C=3C=CC=C4)=C3C(C=CC=C3)=CC=2)C2C=CC=CC=2)=CC=1.C(N(CC)CC)C.[C:68]1(=[O:77])[C:76]2[C:71](=[CH:72][CH:73]=[CH:74][CH:75]=2)[CH:70]=[CH:69]1>O1CCOCC1.O.[B-](F)(F)(F)F.C1C2C=CC1C=C2.C1C2C=CC1C=C2.[Rh]>[C:68]1(=[O:77])[C:76]2[C:71](=[CH:72][CH:73]=[CH:74][CH:75]=2)[CH2:70][CH2:69]1To a solution of compound A (57 g) in tetrahydrofuran (600 mL) was added triethylamine (30 mL) dropwise over 30 min. The reaction mixture was kept at room temperature for 3 hours. The precipitated solid was filtered and the filtrate was concentrated in vacuo. The residue was reprecipitated from diethyl ether to afford compound B (31 g) as a yellow solid. To a solution of compound phenyl-d5-boronic acid (25 g) in 1,4-dioxane/water (900 mL/90 mL) was added [Rh(ndb)2]BF4 (1.3 g), racemic BINAP (2.1 g) and triethylamine (14 mL), then the reaction mixture was kept at room temperature for 2 hours under N2. Then compound indenone (19 g) was added, and the resulting mixture was heated to 100° C. for 3 hours. The precipitated solid was filtered off. The filtrate was concentrated in vacuo. The residue was purified by chromatography to afford indanone C (10 g).
Wird geladen…
