Research Article
Microwave-Assisted Synthesis of Tetrahydrocarbazole Linked 1,2-Diazoles in Aqueous-Brønsted Acid Catalytic System
Table 1
An overview of reactants and diazoles 4/5/6(a–o).
| | Sr # | | Aldehyde | Hydrazine unit | Product code |
| | (1) | | C6H5 (2a) | H2N⋅NH2⋅H2O (3a) | 4a | | (2) | o-OH-C6H4 (2b) | H2N⋅NH2⋅H2O (3a) | 4b | | (3) | p-OMe-C6H4 (2c) | H2N⋅NH2⋅H2O (3a) | 4c | | (4) | p-Cl-C6H4 (2d) | H2N⋅NH2⋅H2O (3a) | 4d | | (5) | C4H3O (2e) | H2N⋅NH2⋅H2O (3a) | 4e | | (6) | C6H5 (2a) | 2,4-NO2-C6H3 (3b) | 4f | | (7) | o-OH-C6H4 (2b) | 2,4-NO2-C6H3 (3b) | 4g | | (8) | p-OMe-C6H4 (2c) | 2,4-NO2-C6H3 (3b) | 4h | | (9) | p-Cl-C6H4 (2d) | 2,4-NO2-C6H3 (3b) | 4i | | (10) | C4H3O (2e) | 2,4-NO2-C6H3 (3b) | 4j | | (11) | C6H5 (2a) | CS(NH2)NH⋅NH2 (3c) | 4k | | (12) | o-OH-C6H4 (2b) | CS(NH2)NH⋅NH2 (3c) | 4l | | (13) | p-OMe-C6H4 (2c) | CS(NH2)NH⋅NH2 (3c) | 4m | | (14) | p-Cl-C6H4 (2d) | CS(NH2)NH⋅NH2 (3c) | 4n | | (15) | C4H3O (2e) | CS(NH2)NH⋅NH2 (3c) | 4o |
| | (16) | | C6H5 (2a) | H2N⋅NH2⋅H2O (3a) | 5a | | (17) | o-OH-C6H4 (2b) | H2N⋅NH2⋅H2O (3a) | 5b | | (18) | p-OMe-C6H4 (2c) | H2N⋅NH2⋅H2O (3a) | 5c | | (19) | p-Cl-C6H4 (2d) | H2N⋅NH2⋅H2O (3a) | 5d | | (20) | C4H3O (2e) | H2N⋅NH2⋅H2O (3a) | 5e | | (21) | C6H5 (2a) | 2,4-NO2-C6H3 (3b) | 5f | | (22) | o-OH-C6H4 (2b) | 2,4-NO2-C6H3 (3b) | 5g | | (23) | p-OMe-C6H4 (2c) | 2,4-NO2-C6H3 (3b) | 5h | | (24) | 4-Cl-C6H4 (2d) | 2,4-NO2-C6H3 (3b) | 5i | | (25) | C4H3O (2e) | 2,4-NO2-C6H3 (3b) | 5j | | (26) | C6H5 (2a) | CS(NH2)NH⋅NH2 (3c) | 5k | | (27) | o-OH-C6H4 (2b) | CS(NH2)NH⋅NH2 (3c) | 5l | | (28) | p-OMe-C6H4 (2c) | CS(NH2)NH⋅NH2 (3c) | 5m | | (29) | p-Cl-C6H4 (2d) | CS(NH2)NH⋅NH2 (3c) | 5n | | (30) | C4H3O (2e) | CS(NH2)NH⋅NH2 (3c) | 5o |
| | (31) | | C6H5 (2a) | H2N⋅NH2⋅H2O (3a) | 6a | | (32) | o-OH-C6H4 (2b) | H2N⋅NH2⋅H2O (3a) | 6b | | (33) | p-OMe-C6H4 (2c) | H2N⋅NH2⋅H2O (3a) | 6c | | (34) | p-Cl-C6H4 (2d) | H2N⋅NH2⋅H2O (3a) | 6d | | (35) | C4H3O (2e) | H2N⋅NH2⋅H2O (3a) | 6e | | (36) | C6H5 (2a) | 2,4-NO2-C6H3 (3b) | 6f | | (37) | o-OH-C6H4 (2b) | 2,4-NO2-C6H3 (3b) | 6g | | (38) | p-OMe-C6H4 (2c) | 2,4-NO2-C6H3 (3b) | 6h | | (39) | p-Cl-C6H4 (2d) | 2,4-NO2-C6H3 (3b) | 6i | | (40) | C4H3O (2e) | 2,4-NO2-C6H3 (3b) | 6j | | (41) | C6H5 (2a) | CS(NH2)NH⋅NH2 (3c) | 6k | | (42) | o-OH-C6H4 (2b) | CS(NH2)NH⋅NH2 (3c) | 6l | | (43) | p-OMe-C6H4 (2c) | CS(NH2)NH⋅NH2 (3c) | 6m | | (44) | p-Cl-C6H4 (2d) | CS(NH2)NH⋅NH2 (3c) | 6n | | (45) | C4H3O (2e) | CS(NH2)NH⋅NH2 (3c) | 6o |
|
|
