中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
2-(2-硝基苯胺基)苯甲酸甲酯 | methyl 2-((2-nitrophenyl)amino)benzoate | 5814-39-1 | C14H12N2O4 | 272.26 |
试图将水合咪唑啉环扩展(HIRE)策略扩展到一系列二芳基融合的[1,4]二氮杂环酮(先前成功应用于双吡啶底物奈韦拉平)并未导致环扩展,而是导致2-氨基乙基侧链的排出。这一看似挫折(限制了HIRE方法的底物范围)导致了发现具有结构活性关系元素的选择性多巴胺D2配体。
试图将水合咪唑啉环扩展(HIRE)策略扩展到一系列二芳基融合的[1,4]二氮杂环酮(先前成功应用于双吡啶底物奈韦拉平)并未导致环扩展,而是导致2-氨基乙基侧链的排出。这一看似挫折(限制了HIRE方法的底物范围)导致了发现具有结构活性关系元素的选择性多巴胺D2配体。
Substrates that are insufficiently activated towards the hydrated imidazoline ring expansion (HIRE) process have been previously found to deliver exclusively the products of aminoalkyl side-chain ring expansion. Attempted reversal of the process by thermal activation towards HIRE failed. We have found that for such problematic substrates the HIRE-type ring expansion can be effectively achieved by applying lithium hexamethyldisilazide (LHMDS) in toluene. LHMDS is thought to promote intramolecular transamidation, which leads to ring-expanded 10- and 11-membered heterocyclic products in modest to good yields. The process significantly broadens the substrate scope amenable to the HIRE strategy.