Studies on nucleophilic substitution reactions with cyclopentadienyliron complexes of some chloroarenes and nitroarenes and syntheses of substituted arenes by demetallation of the substitution products
作者:A.S. Abd-El-Aziz、C.C. Lee、A. Piórko、R.G. Sutherland
DOI:10.1016/0022-328x(88)80343-7
日期:1988.6
SNAr products, without significant steric hindrance. However, no reaction was observed in the treatment of XIVa or XIVb with DBM, suggesting that only with a bulky nucleophile such as that derived from DBM were steric hindrance effects sufficiently large to prevent an SNAr reaction with XIV, a or XIVb. Pyrolytic sublimation of the various SNAr products was found to cause decomposition in some cases
与环戊二烯基(CpFe的量)配合物的亲核取代反应米或- p被发现与来自乙酰乙酸乙酯(EAA)衍生的碳阴离子亲核体,二苯甲酰甲烷(DBM)或diacetylmethane(DAM) -二氯苯,得到单取代仅如先前对于CpFe的量观察到复杂的的Ø二氯苯。2,6-二甲基氯苯(XIVa)或2,6-二甲基硝基苯(XIVb)的CpFe络合物与衍生自氨,二甲胺,正丁胺,吡咯烷,乙醇,苯酚,邻硫代甲酚和EAA的亲核试剂的反应均得到S N氩气产物,无明显的空间位阻。然而,没有反应在XIVA或XIVb的与DBM的治疗中观察到,这表明仅与一个亲核试剂笨重例如从DBM衍生为空间位阻的影响足够大以防止一个S Ñ与XIV,一个或XIVb的氩反应。在某些情况下,发现各种S N Ar产品的热升华会引起分解,但在大多数情况下,会发生脱金属,从而生成取代的芳烃。在本工作中以这种方式制备的新取代的芳烃包括RC 6 H 4 CH(COC