Heterocyclic analogues of cyclopentadienylidenecycloheptatriene derived from 1,3,4-oxadiazole and 1,2,4-triazole
作者:G. V. Boyd、M. D. Harms
DOI:10.1039/j39700000807
日期:——
Heterocyclic systems having the same π-electron configuration as cyclopentadienylidenecycloheptatriene are of two types, covalent and dipolar. The stable covalent 2-fluoren-9-ylidene-3,5-dimethyl-Δ4-1,3,4-oxadiazoline (10) and 5-fluoren-9-ylidene-1,3,4-trimethyl-Δ2-1,2,4-triazoline (15) have been prepared starting with fluorene-9-carbohydrazide. The synthesis of the unstable dipolar anhydro-5-fluoren-9-yl-2
具有与环戊二烯基亚基环庚三烯相同的π-电子构型的杂环系统是共价的和双极性的两种。的稳定的共价2芴-9-亚基-3,5-二甲基- Δ 4 -1,3,4-恶二唑啉(10)和5-芴-9-亚基-1,3,4-三甲基- Δ 2 - 1,2,4-三唑啉(15)已从芴-9-碳酰肼开始制备。描述了不稳定的偶极二氢脱水5-芴-9-基-2,3-二苯基-1,3,4-氧二唑鎓氢氧化物(20)的合成以及试图获得其5-二苯基甲基类似物的尝试。