as well as 13. It might reasonably be supposed that the formation of 13 proceeds in a process involving four steps: (i) the formation of the intermediate 6H-6-benzo[cd]pyren-6-ylmethyl cation (8); (ii) the conversion of 8 into the reactive 6-methylenebenzo[cd]pyrene (5) by the loss of a proton; (iii) the head-to-head self-Diels-Alder dimerization of 5 to the initial dimer, 6,7-dihydrospiro[benzo[ghi]perylene-5(4aH)
6-
甲磺酰氧基甲基-
6H-苯并[cd]芘(6)的乙酰化得到7,7a-二氢螺[
苯并[ghi]苝-5-(6H),6'-[6H]苯并[cd]
芘](13 ),而在甲解过程中,6 得到螺[
苯并[ghi]苝-5(6H),6'-[6H]苯并[cd]-
芘]、6-羟甲基-
6H-苯并[cd]芘和6 -甲基-
6H-苯并[cd]芘以及 13。可以合理地假设 13 的形成过程涉及四个步骤:(i) 中间体 6H-6-苯并[cd]
芘的形成-6-基甲基阳离子(8);(ii) 通过失去一个质子将 8 转化为反应性 6-亚甲基苯并[cd]
芘 (5);(iii) 5 到初始二聚体 6,7-dihydrospiro[benzo[ghi]perylene-5(4aH),6'-[cd]benzo[cd]pyrene 的头对头自狄尔斯-阿尔德二聚化],和 (iv) 1,3-氢转移形成 13。当在
氯仿中用
三乙胺处理 6-甲基苯并[cd]
芘-6-基四
氟硼酸酯