Table 13.
a The Effect of Solvents on the Cross-Coupling Reactions of Aryl Boronic Acid with Alkene in the Presence of Ligand
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entry | solvent | yield (%)b |
||
28 | 29 | 30 | ||
1 | DMF | 84 | - | 13 |
2 | DMA | 77 | - | 22 |
3 | NMP | 77 | - | 23 |
4 | MeCN | 63 | - | 37 |
5 | THF | 35 | 23 | 42 |
All reactions were carried out with phenylboronic acid (1 mmol), tert-butyl acrylate (1.5 mmol), 1,10-dimethylphenanthroline (5mol%), and Pd(OAc)2 (5 mol%) in solvent (2.5 mL).
isolated yield.