一些4-(2′-羟基)-5-乙基-2-(N, N-二烷基氨基)-1,3-二硫鎓盐的合成

M. Birsa
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引用次数: 4

摘要

4-(2′-羟基)-5-乙基-2-(N,N-二烷基胺)-1,3-二硫代盐(6a-e)是通过相应的碳二硫代酸盐(3a-e)的杂环化合成的。所需的起始材料(1a,b)是通过1-(2 ' -羟基)丁酮(4a,b)的区域选择性溴化制备的。在碱性条件下,盐6a-e产生无氢氢氧化物7a-e,这是一种介离子化合物,具有分子内电荷转移UV/Vis吸收,供体部分通过σ键桥(C5-S1, C4-S3)连接到受体部分。
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Synthesis of some 4-(2′-hydroxyaryl)-5-ethyl-2-(N, N-dialkylamino)-1,3-dithiolium salts
The synthesis of 4-(2′-hydroxyaryl)-5-ethyl-2-(N,N-dialkylamino)-1,3-dithiolium salts (6a–e) has been accomplished by the heterocyclization of the corresponding carbodithioates (3a–e). The required starting materials (1a,b) have been prepared by regioselective bromination of 1-(2′-hydroxyaryl)butanones (4a,b). Under basic conditions, salts 6a–e afford anhydro-hydroxides 7a–e, which are mesoionic compounds with an intramolecular charge-transfer UV/Vis absorption where the donor moiety is linked through σ-bonded bridges (C5-S1, C4-S3) to the acceptor moiety.
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