Entry | Ra | Product | Time (min) | Yield (%)b | M.P (°C) found | M.P (°C) reported (refs.) |
---|---|---|---|---|---|---|
1 | C6H5- | 4a | 20 | 85 | 232‒234 | 234‒235 [22] |
2 | 4-Cl-C6H4- | 4b | 15 | 92 | 214‒216 | 215‒216 [22] |
3 | 2-Cl–C6H4- | 4c | 35 | 81 | 217‒218 | 218‒219 [23] |
4 | 2,6-Cl2-C6H3- | 4d | 50 | 79 | 245‒247 | 250‒252 [23] |
5 | 4-NO2-C6H4- | 4e | 15 | 89 | 181‒183 | 181‒182 [27] |
6 | 3-NO2-C6H4- | 4f | 20 | 91 | 215‒217 | 217‒218 [27] |
7 | 2-NO2-C6H4- | 4 g | 35 | 80 | 232‒234 | 233‒234 [22] |
8 | 4-Br-C6H4- | 4 h | 30 | 89 | 199‒201 | 197‒201 [13] |
9 | 4-F-C6H4- | 4i | 40 | 91 | 192‒194 | 191‒193 [15] |
10 | 4-CN-C6H4- | 4j | 25 | 85 | 231‒233 | 226‒228 [24] |
11 | 4-OCH3-C6H4- | 4 k | 25 | 70 | 208‒210 | 208‒212 [23] |
12 | 3,4-(OCH3)2-C6H3- | 4 l | 50 | 82 | 175‒176 | 206‒208 [25] |
13 | 4-OH-C6H4- | 4 m | 40 | 78 | 217‒219 | 214‒216 [23] |
14 | 4-(CH3)2CH-C6H4- | 4n | 30 | 90 | 197‒199 | 203‒207 [13] |
15 | 4-CO2CH3-C6H4- | 4o | 15 | 78 | 257‒259 | 259‒260 [27] |
16 | 1,4-Phenylene | 4p | 50 | 91 | 285 (d)c | 270 (d) [26] |
17 | 2-Furyl- | 4q | 25 | 84 | 216‒218 | 217‒219 [23] |
18 | Pentyl- | 4r | 20 | 83 | 162‒164 | 164‒165 [27] |
19 | Styryl- | 4 s | 30 | 90 | 217‒219 | 218‒218 [23] |