Enamide von Phosphorsäure- und Thiophosphorsäureestern. 22. Mitt. über Untersuchungen an Acyl-enaminen
作者:F. Eiden、E. Schönduve
DOI:10.1002/ardp.19723050702
日期:——
Phosphorsäure‐ und Thiophosphorsäureester‐amide (1a–c, 5) reagieren mit substituierten Acetaldehyden (3a–d) zu den Enamiden 4a–h sowie 6a–d. Diese können durch katalytisches Hydrieren in N‐substituierte Phosphorsäureester‐amide (7a, b), durch Reaktion mit Aldehyden (3b, d) in 3‐Azapentadiene (12a, b) umgewandelt werden.
The Synthesis and Evalution of Novel Aryl-Substituted Dithioimidophosphonates as an Extrantant for Metals
作者:Ruiren Tang、Cancheng Gou
DOI:10.1080/104265090968064
日期:2005.12
A novel series of O, O′, O″, O”′-tetraaryldithioimidophonates [(ArO) 2 PS] 2 NH 4 were synthesized by the reaction of O, O,-diaryl phosphorochlorothionates 2 and diarylphosphonothioic amide under a strong basic condition. The key intermediates 2a ∼ 2g were prepared from thiophosphyl chloride and substituted phenols under phasetransfercatalysis conditions for the first time. These teteraaryl dithioimidophonates
通过O,O,-二芳基氯硫代磷酸酯2和二芳基硫代膦酰胺在强碱性条件下反应合成了一系列新型O,O',O",O"'-四芳基二硫代亚氨基膦酸酯[(ArO)2PS]2NH4。以硫代磷酰氯和取代酚为原料,在相转移催化条件下首次制备了关键中间体2a~2g。这些四芳基二硫代亚氨基膦酸酯对来自硫酸盐溶液的 Zn 2 + 比 Fe 3 + 显示出高选择性。还讨论了取代基对标题化合物的 31 P NMR 的影响。
Non-toxic corrosion-protection pigments based on manganese
申请人:——
公开号:US20040011252A1
公开(公告)日:2004-01-22
Corrosion-inhibiting pigments based on manganese are described that contain a trivalent or tetravalent manganese/valence stabilizer complex. An inorganic or organic material is used to stabilize the trivalent or tetravalent manganese ion to form a compound that is sparingly soluble, exhibits low solubility, or is insoluble in water, depending upon the intended usage. Specific stabilizers are chosen to control the release rate of trivalent or tetravalent manganese during exposure to water and to tailor the compatibility of the powder when used as a pigment in a chosen binder system. Stabilizers may also modify the processing and handling characteristics of the formed powders. Manganese/valence stabilizer combinations are chosen based on the well-founded principles of manganese coordination chemistry. Many manganese-valence stabilizer combinations are presented that can equal the performance of conventional hexavalent chromium or tetravalent lead systems. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.
Non-toxic corrosion-protection pigments based on rare earth elements
申请人:——
公开号:US20040104377A1
公开(公告)日:2004-06-03
A corrosion-inhibiting pigment comprising a rare earth element and a valence stabilizer combinded to form a rare earth/valence stabilizer complex. The rare earth element is selected from cerium, terbium, praseodymium, or a combination thereof, and at least one rare earth element is in the tetravalent oxidation state. An inorganic or organic material is used to stabilize the tetravalent rare earth ion to form a compound that is sparingly soluble in water. Specific stabilizers are chosen to control the release rate of tetravalent cerium, terbium, or praseodymium during exposure to water and to tailor the compatibility of the powder when used as a pigment in a chosen binder system. Stabilizers may also modify the processing and handling characteristics of the formed powders. Many rare earth-valence stabilizer combinations are presented that can equal the performance of conventional hexavalent chromium systems.