中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | tris(1H-indol-3-yl)methane | 518-06-9 | C25H19N3 | 361.446 |
1-甲基吲哚-3-甲醛 | N-methyl-3-formylindole | 19012-03-4 | C10H9NO | 159.188 |
The synthesis of various triindolylmethanes from indole-3-carboxaldehyde, using indole derivatives as reactants and NH4Cl as catalyst under solvent-free conditions, is described. This methodology provides access to both symmetrical and unsymmetrical triindolylmethanes in excellent yields. With N-methylindole particularly, indole-3-carboxaldehyde appears to act as a formyl donor, leading to the exclusive formation of a symmetrically trisubstituted product. The novelty of the methodology lies in its operational simplicity, environment friendly reaction conditions, and inexpensive and easy availability of the catalyst. A plausible mechanism of formation of the products is suggested.