Vilsmeier-Haack reaction of 2,3,3-trimethyl-3H-benzo[g]indole, then aqueous basic work-up, leads to benzo[g]indol-2-ylidene- malondialdehydes. These react with various arylhydrazines and quinolin-2-ylhydrazine to form 3,3-dimethyl-2-(1-aryl-1H-pyrazol-4-yl)- 3H-benzo[g]indoles in good yields.
Khezri, M., Afghan, A., Roohi, L., & Baradarani, M. M. (2016). Vilsmeier-Haack Reaction with 2,3,3-Trimethyl-3H-benzo[g]indole and Its Conversion into 2-(1-aryl-1H-pyrazol-4-yl)-3,3-dimethyl-3H-benzo[g]indoles. Organic Chemistry Research, 2(2), 120-126. doi: 10.22036/org.chem..2016.14824
MLA
Mohsen Khezri; Arash Afghan; Laya Roohi; Mohammad Mehdi Baradarani. "Vilsmeier-Haack Reaction with 2,3,3-Trimethyl-3H-benzo[g]indole and Its Conversion into 2-(1-aryl-1H-pyrazol-4-yl)-3,3-dimethyl-3H-benzo[g]indoles". Organic Chemistry Research, 2, 2, 2016, 120-126. doi: 10.22036/org.chem..2016.14824
HARVARD
Khezri, M., Afghan, A., Roohi, L., Baradarani, M. M. (2016). 'Vilsmeier-Haack Reaction with 2,3,3-Trimethyl-3H-benzo[g]indole and Its Conversion into 2-(1-aryl-1H-pyrazol-4-yl)-3,3-dimethyl-3H-benzo[g]indoles', Organic Chemistry Research, 2(2), pp. 120-126. doi: 10.22036/org.chem..2016.14824
VANCOUVER
Khezri, M., Afghan, A., Roohi, L., Baradarani, M. M. Vilsmeier-Haack Reaction with 2,3,3-Trimethyl-3H-benzo[g]indole and Its Conversion into 2-(1-aryl-1H-pyrazol-4-yl)-3,3-dimethyl-3H-benzo[g]indoles. Organic Chemistry Research, 2016; 2(2): 120-126. doi: 10.22036/org.chem..2016.14824
)