Cyclocondensation of [1-Cyano-2-(methylsulfanyl)vinyl]triphenylphosphonium Iodide with Amidine Nucleophiles
作者:O. B. Smolii、L. V. Muzychka、A. N. Chernega、B. S. Drach
DOI:10.1007/s11176-005-0266-2
日期:2005.4
The substituted vinylphosphonium salt ( E )-MeSCH=C(CN)P+Ph3I− readily cyclizes under the action of benzamidine and 3-amino- s -triazole, but it does not enter cyclocondensation with 2-aminopyridine. The structure of the cyclization product with 3-amino- s -triazole was confirmed by its transformation to 7-imino-6-(triphenylphosphoranylidene)-6,7-dihydro-s-triazolo[1,5]pyrimidine which was identified