中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | (2,2'-dimethyl-benzhydryl)-malonic acid | 500794-59-2 | C18H18O4 | 298.339 |
—— | 2-(2,2'-Dimethylbenzhydryl)propane-1,3-diol | 172876-73-2 | C18H22O2 | 270.371 |
—— | β-(2,2'-Dimethylbenzhydryl)glutaric acid | 172876-76-5 | C20H22O4 | 326.392 |
—— | β-(2,2'-Dimethylbenzhydryl)glutaronitrile | 172876-75-4 | C20H20N2 | 288.392 |
Synthetic routes based on Newman's1-7 synthesis of a number of polycyclic aromatic hydrocarbons were modified and developed to give a convenient preparation (Scheme 1) of 11 helical molecules formally based on hexalindione (1). In contrast to Newman's work determined the stereochemistry at C6a-C12b in (1a-k) and in some cases, were able to control it. We also investigated the competitive formation of six- and seven- membered rings in the reaction yielding the hexacyclic derivatives (1d, e). In addition, we report an unusual fragmentation (Scheme 2) leading to the unexpected by-product 4-methoxyacetophenone (16) in the synthesis of (1h).