Aromatic Sulfonation, 130. – Relative Intramolecular Reactivity of the Insulated π Double Bond and the 14π Annulene Perimeter toward Sulfur Trioxide in the Sulfonation of Isopyrenes
作者:Hans Cerfontain、Bert H. Bakker、Ankie Koeberg-Telder、Oswald Wilmes
DOI:10.1002/jlac.199719970110
日期:1997.1
The sulfonation of isopyrene (1) and its 5-methyl- and 5,10-dimethyl derivative 2 and 3 with SO3 in both dichloromethane and nitromethane as solvent has been studied. Reaction of 1 and 2 leads to sulfodehydrogenation in which SO3 reacts as a monodentate electrophile, the initial products being 1-5-sulfonic acid (1-5-S) and 2-10-S, respectively. In the presence of a sufficiently large amount of SO31-5-S
isopyrene的(磺化1)和它的5-甲基-5,10-和二甲基衍生物2和3与SO 3在两个二氯甲烷和硝基甲烷作为溶剂进行了研究。1和2的反应导致磺基加氢,其中SO 3以单齿亲电体的形式发生反应,初始产物分别为1 -5-磺酸(1 -5-S)和2 -10-S。在足够大量的SO 3 1 -5-S存在下,随后将其转化为1 -5,10-S 2。与3使用2.0摩尔倍的二氯甲烷中的磺化试剂,SO 3作为双齿亲电子体加入“中心C = C键”,形成7,14-二甲基-1,6:8,13-乙二亚甲基-[14 ] annulene- 15,16-磺内酯(5)和相应的焦磺内酯6。在随后的水解和用KOH水溶液中和后,最终获得的产物是钾16-羟基-7,14-二甲基-1,6:8,13-乙二亚基-[14]环戊烯-15-磺酸盐(4)。