中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
3-碘-1-甲苯磺酰-1H-吲哚-2-甲醛 | 2-formyl-3-iodo-1-tosylpyrrole | 233770-15-5 | C12H10INO3S | 375.187 |
—— | 2-formyl-3-phenyl-1-tosylpyrrole | 233770-22-4 | C18H15NO3S | 325.388 |
—— | 2-formyl-3-(p-nitrophenyl)-1-tosylpyrrole | 233770-26-8 | C18H14N2O5S | 370.386 |
—— | 2-formyl-3-(o-methoxyphenyl)-1-tosylpyrrole | 233770-28-0 | C19H17NO4S | 355.414 |
Suzuki cross-coupling reactions of 3-pyrroleboronic acid derivatives with haloaromatics and the reverse process i.e., the coupling of 3-iodo(bromo)pyrroles with arylboronic acids have been investigated as a potential key step in the synthesis of ()-rhazinilam and analogues. It was found that 3-iodo-2-formyl-1-tosylpyrroles efficiently coupled with a variety of arylboronic acids in the presence of PdCl2(dppf) as catalyst. This catalytic system is compatible with a broad spectrum of arylboronic acids electron-rich, electron-poor, hindered, heterocyclic which easily coupled with the pyrrole substrate.Key words: 2-substituted-3-arylpyrroles, biaryls, coupling reactions, arylboronic acids, palladium coupling, catalysis.