Reduction of nitro- and nitroso-compounds by tervalent phosphorus reagents. Part IX. The ‘blocked ortho’ effect in reactions of 2,6-di-substituted aryl 2-nitrophenyl and 2,6-disubstituted aryl 2-azidophenyl sulphides: a new series of nitrene-induced aromatic rearrangements
作者:J. I. G. Cadogan、S. Kulik
DOI:10.1039/j39710002621
日期:——
thermolysis of the corresponding 2-azido-derivatives proceed via rearrangement involving a free ortho-position in the aryl group to give phenothiazines, corresponding reactions involving nitro-compounds and azides in which both ortho-positions are blocked have been carried out. These have led to a new series of aromatic rearrangements whereby 2-nitrophenyl 2,6-dimethyl-, 2,6-dimethoxy-, 2,6-dichloro-
鉴于有证据表明,将芳基2-硝基苯基硫化物与亚磷酸三乙酯脱氧并进行相应的2-叠氮基衍生物的热解是通过重排进行的,该重排涉及芳基中的游离邻位,从而产生吩噻嗪,相应的反应涉及硝基化合物和已经完成了两个邻位都被阻断的叠氮化物。这些导致了一系列新的芳族重排,其中2-硝基苯基2,6-二甲基-,2,6-二甲氧基-,2,6-二氯-,2-氯-6-甲基-,2,4,6-三甲基和2,6-二乙氧基羰基苯基硫化物以及(除了姓氏例外)相应的2-叠氮基衍生物分别转化为5,11-二氢-4-甲基二苯并[ b,e] [1,4] thiazepine(17),1-和1,2-二甲氧基吩噻嗪(通过新型的脱甲氧基作用和1,4-甲氧基基团转移),1-和4-氯吩噻嗪,1-和4-甲基吩噻嗪, 5,11-二氢-2,4-二甲基二苯并[ b,e ] [1,4]噻嗪(23)和4a H-吩噻嗪-1,4a-二羧酸二乙酯(50)。在两种氯取代的衍生物的情