The acylphosphonate function as an activating and masking moiety for the α-chlorination of fatty acids
作者:Christian Stevens、Laurent De Buyck、Norbert De Kimpe
DOI:10.1016/s0040-4039(98)01939-x
日期:1998.11
α-Chloroacylphosphonates were prepared in situ by chlorination of acylphosphonates using sulfurylchloride and were subsequently cleaved to the corresponding α-chlorinated fatty acids with hydrogen peroxide - sodium bicarbonate.
Halogenation is carried out regiospecifically in the presence of a cyanoquinone.
在存在氰基喹酮的情况下,卤代反应以区域特异性进行。
Thermographic materials processable at lower temperatures
申请人:Maskasky E. Joe
公开号:US20060019205A1
公开(公告)日:2006-01-26
Direct thermographic materials can be imaged at lower temperatures. These materials include a non-photosensitive, non-halogen-containing organic silver salt and a reducing agent for silver ions. The materials also contain a halogen-containing compound that has at least 2 carbon atoms and is capable of releasing its halogen to form silver halide when heated to a temperature between 60 and 141° C. in the presence of source of silver.
Halogenation process in the presence of cyanoquinone catalyst
申请人:The Procter & Gamble Company
公开号:US04368140A1
公开(公告)日:1983-01-11
Halogenation is carried out regiospecifically in the presence of a cyanoquinone.
在存在氰基喹酮的情况下,卤化反应以区域选择性进行。
Process for halogenating carboxylate compounds
申请人:THE PROCTER & GAMBLE COMPANY
公开号:EP0000414A1
公开(公告)日:1979-01-24
Process for halogenating carboxylate compounds having at least one reactive alpha hydrogen substituent, comprising contacting said carboxylate compound with a halogen or halogen source in the presence of an effective amount of a cyanoquinone compound and acidic auxiliary agent, a catalyse system comprising the cyanoquinone material and the acidic auxiliary agent, and a halogenation medium comprising a halogen, selected from chlorine and bromine and a catalyst system comprising a cyanoquinone material and an acidic auxiliary agent.