作者:S. Abouricha、E. M. Rakib、N. Benchat、M. Alaoui、H. Allouchi、B. El Bali
DOI:10.1080/00397910500182697
日期:2005.8.1
Abstract New derivatives of the spiro type of pyridazines have been synthesized by 1,3‐dipolar cycloaddition of N‐aryl‐C‐ethoxycarbonylnitrile imines with pyridazin‐3(2H)‐thiones. When the nitrile oxide was used, the corresponding pyridazin‐3(2H)‐one was obtained from the intermediate spirooxathiazole by elimination of isothiocyanate group. The peri‐ and regioselectivity of the reaction were ascertained
摘要 通过 N-芳基-C-乙氧基羰基腈亚胺与哒嗪-3(2H)-硫酮的 1,3-偶极环加成反应合成了新的螺型哒嗪衍生物。当使用氧化腈时,通过消除异硫氰酸酯基团,从中间体螺恶噻唑中得到相应的哒嗪-3(2H)-one。通过环加合物 3-9 的 X 射线分析和 13C NMR 光谱确定反应的周边和区域选择性。