Aromatization and Halogenation of 3,3a,4,5-Tetrahydro-3-aryl-2-phenyl-2<i>H</i>-benzo[g]indazole Using I<sub>2</sub>/DMSO, CuCl<sub>2</sub>/DMSO, and<i>N</i>-Bromosuccinimide
作者:Pradeep D. Lokhande、Kamal Hasanzadeh、Hamid Khaledi、Hapipah Mohd Ali
DOI:10.1002/jhet.1049
日期:2012.11
l‐2H‐benzo[g]indazoles 4 with I2/DMSO led to the oxidation of the five‐member rings (5) as well as the iodination of N‐phenyl moieties along with oxidation of the five‐member rings (6). However, the reactions of 4 with CuCl2/DMSO gave only compounds 5. The reaction of N‐bromosuccinimide (NBS) with compounds 4 resulted in fully aromatization along with bromination at C‐5 of the indazole rings (7). The
用I 2 / DMSO处理3,3a,4,5-四氢-3-3-芳基-2-苯基-2 H-苯并[g]吲唑4也会导致五元环的氧化(5)N-苯基部分的碘化以及五元环的氧化(6)。但是,4与CuCl 2 / DMSO的反应仅产生化合物5。N-溴代琥珀酰亚胺(NBS)与化合物4的反应导致完全芳构化,以及吲唑环的C-5处溴化(7)。化合物5和5中的吲唑六元环6通过使用NBS(溴化沿也经历芳构7和8)。