反应详情

To a stirred solution of K2CO3 (4.99 g, 36.1 mmol) in 18 mL H2O was added 145 mL dioxane, 3-bromo-4-(2-hydroxyethoxy)-5-iodobenzoic acid ethyl ester (5.0 g, 12.04 mmol), and 3-chloro-4-fluorophenylboronic acid (2.1 g, 12.04 mmol) at room temperature. This mixture was stirred for 5 min then degassed twice. Then [1,1í-bis(diphenylphosphino)ferrocene]dichloropalladium(II), complex with CH2Cl2 (49 mg, 0.06 mmol) was added. The reaction was stirred for three hours then 98 mg, 0.12 mmol, of the catalyst was added. The reaction was allowed to stir for five days at room temperature before being worked up in the following manner. The reaction was diluted with 1N HCl and H2O and extracting with EtOAc three times. The combined organic extracts were dried over Na2SO4 and filtered. Removal of the solvent in vacuo gave crude material which was subjected to prep HPLC to yield 2 g, 35.5% of the bis arylated product 1H NMR (CDCl3) δ 1.40 (t, J=8.18 Hz, 3H); 1.945 (s, 1H); 3.712 (m, 4H); 4.36 (q, J=8.18 Hz, 2H); 7.19-7.23 (m, 1H); 7.40-7.45 (m, 1H); 7.60-7.65 (dd, J=8.18 Hz, 2.73 Hz, 1H); 7.91 (d, J=2.73 Hz, 1H); 8.24 (d, J=2.73 Hz, 1H); and 860 mg, 17.1% of the mono arylated product 1H NMR (CDCl3) δ 1.29 (bs, 1H); 1.41 (t, J=8.18 Hz, 3H); 3.40 (m, 4H); 4.40 (q, J=8.18 Hz, 2H); 7.20-7.28, (m, 2H); 7.454-7.545 (m, 2H); 7.69 (dd, J=8.18 Hz, 2.73 Hz, 2H); 8.013 (s, 1H); and 38% recovered SM.

1. customthen degassed twice
2. stirringThe reaction was stirred for three hours
3. addition98 mg, 0.12 mmol, of the catalyst was added
4. stirringto stir for five days at room temperature
5. extractionextracting with EtOAc three times
6. dry with materialThe combined organic extracts were dried over Na2SO4
7. filtrationfiltered
8. customRemoval of the solvent in vacuo
9. customgave crude material which
10. customto yield 2 g, 35.5% of the bis
11. customand 38% recovered SM