Tropones. Part III. The mechanism of the production of m-hydroxybenzaldehydes from 2-chlorotropones
作者:E. J. Forbes、M. J. Gregory、D. C. Warrell
DOI:10.1039/j39680001969
日期:——
Using a variety of oxidising agents, nitro-2-chlorotropones are converted into m-hydroxybenzaldehydes in which all the substituents of the original tropone are retained. Thus, 2-chloro-7-nitrotropone gives 4-chloro-3-hydroxy-2-nitrobenzaldehyde, and 2-chloro-5-nitrotropone, gives 2-chloro-3-hydroxy-6-nitrobenzaldehyde. 2-Chloro-5,7-dinitrotropone, obtained by nitrating 2-chloro-5-nitrotropone, gives
采用各种氧化剂的,硝基-2- chlorotropones被转换成米-hydroxybenzaldehydes其中原始环庚三烯酮的所有取代基都将保留。因此,2-氯-7-硝基硝酮产生4-氯-3-羟基-2-硝基苯甲醛,并且2-氯-5-硝基硝酮产生2-氯-3-羟基-6-硝基苯甲醛。通过将2-氯-5-硝基硝酮硝化而获得的2-氯-5,7-二硝基萘酮在氧化剂水溶液中但在乙酸水溶液中处理时,可得到2-氯-3-羟基-4,6-二硝基苯甲醛作为唯一的醛。氯化物的消除与氧化竞争并获得5-羟基-2,4-二硝基苯甲醛。氘代研究表明,当2-氯-7-硝基酮转化为4-氯-3-羟基-2-硝基苯甲醛时,C-6成为醛碳。