Reactions of 1,3-dihaloadamantanes with diphenylphosphide ions by theSRN1 mechanism. Competition between intermolecular and intramolecular electron transfer reactions
作者:Andres E. Lukach、Ana. N. Santiago、Roberto A. Rossi
DOI:10.1002/poc.610071104
日期:1994.11
under photostimulation by the SRN1 mechanism. Irradiation of 1c without Ph2P− ions gave no reaction (<5%). Three products were found: 1,3-bis(diphenyphosphinyl)adamantane (2), (3-X-1-adamantyl)diphenylphosphine (X = Cl, 3a; X = Br, 3b) and 1-adamantyldiphenylphosphine (4). Compounds 2 and 4 were formed by intramolecular electron transfer (ET) of the radical anion 3a−· (3b−·); whereas 3a (3b) were formed
1,3- dihaloadamantanes与二苯基磷化物离子(pH下反应2 P - )在液氨中进行了研究。1,3- Dichloroadamantane(1A),1-溴-3- chloroadamantane(1b)和1,3-二溴金刚烷(1c)中的Ph反应2 P -下光刺激由S离子RN 1机构。1c的照射不进行pH 2 P -离子没有给出反应(<5%)。发现三种产物:1,3-双(二苯膦基)金刚烷(2),(3-X-1-金刚烷基)二苯基膦(X = Cl,3a; X = Br,3b)和1-金刚烷基二苯基膦(4)。化合物2和4是通过自由基阴离子3a- ·(3b- ·); 而3a(3b)是由该自由基阴离子在底物上的分子间ET形成的。观察到产物分布取决于底物和反应条件。