A facile synthesis of 5(6)‐(chloromethyl)benzimidazoles: Replacement of a sulfonic acid functionality by chlorine
作者:Béla Pete、Bálint Szokol、László Toőke
DOI:10.1002/jhet.5570450208
日期:2008.3
5(6)-(chloromethyl)benzimidazoles, were prepared by the facile elimination of sulfur dioxide under the influence of thionyl chloride from benzimidazole-5(6)-methane-sulfonic acids easily obtained from (3,4-diaminophenyl)methanesulfonic acid with formic-, or trifluoroacetic acid. Both reaction steps involved only acidic conditions, thus the synthesis of polysubstituted 5(6)-(chloromethyl)benzimidazoles
通过从易于从(3,4-二氨基苯基)甲磺酸与甲酸或三氟乙酸。这两个反应步骤仅涉及酸性条件,因此可以合成掺有碱敏感取代基的多取代5(6)-(氯甲基)苯并咪唑。