Synthesis and Reactions of Some New Thieno[2,3-C]pyridazine Derivatives
作者:Ahmed S. N. Al-Kamali
DOI:10.1080/10426500802353213
日期:2009.7.13
The alkylation of 4-cyano-5,6-dimethylpyridazin-3(2H)-thione 3 with some halo compounds gave the S-alkylated products 4a–c , which upon treatment with ethanolic sodium ethoxide afforded the cyclized thienopyridazines 5a–c as products. Pyridazothienotriazines 6a–c were prepared by the treatment of compounds 5a–c with nitrous acid, while their reaction with triethyl orthoformate and with carbon disulfide