Entry | R | Yieldsb (%) | m.p. (℃) | |
Found | Reported [lit.] | |||
4a | C6H5 | 89 | 90~92 | 89~91 [15] |
4b | 4-Me-C6H4 | 75 | 116~118 | 118~120 [16] |
4c | 2-MeO-C6H4 | 82 | 68~69 | 66~68 [13] |
4d | 3-MeO-C6H4 | 80 | 116~117 | 113~115 [13] |
4e | 4-F-C6H4 | 81 | 103~105 | 105~107 [15] |
4f | 2-Cl-C6H4 | 80 | 139~140 | 136~138 [16] |
4g | 2-Br-C6H4 | 84 | 121~123 | 121~122 [10] |
4h | 2-NO2-C6H4 | 81 | 120~122 | 121~123 [16] |