3-dichlorobenzosultams in good yields. Thermal extrusion of SO2 from 3,3-dichloropyridosultams generates dichloro derivatives of aza-ortho-xylylenes which do not enter [4+2] cycloaddition reactions, but add amines to form amidines. With aromatic diamines and aminophenols, benzimidazole and benzoxazole derivatives are formed in good yields.
在50%NaOH
水溶液和四烷基
铵盐的存在下,在相转移催化条件下用
六氯乙烷氯化2,1-
苯并噻唑啉2,2-二氧化物(苯并sultams),得到3,3-二
氯苯并sultams,收率很好。从3,3-二
氯吡啶并杜仲中热挤出SO 2生成的氮杂
邻二甲苯基二
氯衍
生物不会进入[4 + 2]环加成反应,但会加成胺形成to。与芳族二胺和
氨基
酚一起,以良好的产率形成
苯并咪唑和
苯并恶唑衍
生物。