Efficient Synthesis and Fungicidal Activities of 2-Alkylthiobenzofuro[3,2-<i>d</i>]Pyrimidinones
作者:Yang-Gen Hu、Wen-Qing Wang、Ming-Wu Ding
DOI:10.1080/10426500903008922
日期:2010.3.24
2-Alkylthiobenzofuro[3,2-d]pyrimidinones 5 and 6 were synthesized by S-alkylation of 2,3-dihydro-2-thioxobenzofuro[3,2-d]pyrimidin-4(1H)-ones 4, which were obtained via aza-Wittig reaction of iminophosphorane 2 with CS2 and further reaction of the product with various amines. Compounds 5 and 6 exhibited fungicidal activity. For example, compound 6a, which has a small N-substituted methyl group, showed the best inhibitive activity (91%) against Dothiorella gregaria at 50 mg/L. Supplemental materials are available for this article. Go to the publisher's online edition of Phosphorus, Sulfur, and Silicon and the Related Elements to view the free supplemental file.