Spirofluoreneisothiazolidinone dioxides as aldose reductase inhibitors
申请人:——
公开号:US04968809A1
公开(公告)日:1990-11-06
New spirofluoreneisothiazolidinone dioxides and methods for their preparation are disclosed.
揭示了新的螺合芴异噻唑啉二氧化物及其制备方法。
CARBONYL AND THIOCARBONYL COMPOUNDS: VIII. SYNTHESIS OF FLUORENE ETHERS BY THE ACTION OF TETRAHALO-<i>o</i>-BENZOQUINONES
作者:N. Latif、N. Mishriky
DOI:10.1139/v64-427
日期:1964.12.1
The halogenated fluorene ethers Ic–If are directly produced by the action of tetrachloro-and tetrabromo-o-benzoquinone on the corresponding halofluorene in boiling dry benzene. The preparation of the fluorene ethers by the action of tetrahalo-o-benzoquinones on 2-chloro-and 2,7-dichloro-fluorenone hydrazone is described. The ketohydrazones are readily oxidized by mercuric oxide to the corresponding 9-diazofluorenes