中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | β-(2-Methylbenzhydryl)glutaric acid | 102172-15-6 | C19H20O4 | 312.365 |
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).