A New and Efficient Method for the Generation of Sulfene (Thioformaldehyde Dioxide)
作者:Dipak Prajapati、Satyendra P. Singh、Asha R. Mahajan、Jagir S. Sandhu
DOI:10.1055/s-1993-25882
日期:——
Chlorosulfonylmethylene(dimethyl)ammonium chloride (1) is a highly reactive dehydrating agent which provides an efficient entry to 3, 4-dihydro-3-phenyl-2H-benzothiazine 1,1-dioxides 4, 4, 5-dihydro-4-(4-oxo-4H-1-benzopyran-3-yl)-3H-1,2, 5-benzoxathiazepine 2,2-dioxides 6 and 2-aryl-5-dimethylamino-5, 6-dihydro-2H-1,2,4-thiadiazine 1,1-dioxides 8 via cycloaddition reactions of imines 3, nitrones 5 and 1,3-diazabutadiene derivatives 7 with in situ generated sulfene directly from the corresponding sulfonic acids. The seven-membered azasultone structural assignments are supported by spectroscopic data.
氯磺酰亚甲基(二甲基)氯化铵 (1) 是一种高反应性脱水剂,可有效生成 3, 4-二氢-3-苯基-2H-苯并噻嗪 1,1-二氧化物 4, 4, 5-二氢-4-( 4-氧代-4H-1-苯并吡喃-3-基)-3H-1,2, 5-苯并氧氮杂 2,2-二氧化物 6 和 2-芳基-5-二甲基氨基-5, 6-二氢-2H-1,2 ,4-噻二嗪1,1-二氧化物8通过亚胺3、硝酮5和1,3-二氮杂丁二烯衍生物7的环加成反应直接从相应的磺酸原位生成亚磺酰。七元氮磺内酯结构分配得到光谱数据的支持。