Orthoamide, LXIX [1]. Beiträge zur Synthese N,N,N´,N´,N´´-peralkylierter Guanidine und N,N,N´,N´,N´´䞲,N´´-persubstituierter Guanidiniumsalze / Orthoamides, LXIX [1]. Contributions to the Synthesis of N, N, N´, N´, N´-peralkylated Guanidines and N, N, N´, N´, N´´, N´´-persubstituted Guanidinium Salts
作者:Willi Kantlehner、Jochen Mezger、Ralf Kreß、Horst Hartmann、Thorsten Moschny、Ioannis Tiritiris、Boyan Iliev、Oliver Scherr、Georg Ziegler、Bahari Souley、Wolfgang Frey、Ivo C. Ivanov、Milen G. Bogdanov、Ulrich Jäger、Günther Dospil、Tillmann Viefhaus
DOI:10.1515/znb-2010-0712
日期:2010.7.1
mixtures by addition of stoichiometric amounts of sodium hydroxide. A modified method is described for the preparation of guanidinium salts possessing dialkylamino substituents consisting of two long-chain alkyl groups (>C14). Some guanidines 9 were alkylated with allyl chloride and bromide, ethyl bromide, butyl bromide, benzyl bromide and chloride, dimethyl sulfate, diethyl sulfate, and methyl methansulfonate
N, N, N', N'-四烷基氯甲脒氯化物 6 由 N, N, N', N'-四烷基脲 5 和光气在乙腈中制备。亚胺盐 6 在三乙胺存在下与伯胺和仲胺反应,得到 N、N、N'、N'、N''-五取代和 N、N、N'、N'、N''、N'' - 六取代胍盐 7 和 8,分别用过量的氢氧化钠处理胍盐 7,得到 N、N、N'N'、N''-五取代的胍 9a-9aa。此外,N、N、N'、N'、N''-五取代和 N、N、N'、N'、N''、N''-六取代的胍盐 7l'、7p' 和 8a-c 可以通过加入化学计量量的氢氧化钠从反应混合物中获得。描述了一种用于制备具有由两个长链烷基 (> C14) 组成的二烷基氨基取代基的胍盐的改进方法。一些胍 9 与烯丙基氯和溴、乙基溴、丁基溴、苄基溴和氯、硫酸二甲酯、硫酸二乙酯和甲磺酸甲酯烷基化,得到相应的胍盐 11-15。 通过 N、N、N 的烷基化´, N´, N´´-五取代胍
A solvent having switchable hydrophilicity
作者:Philip G. Jessop、Lam Phan、Andrew Carrier、Shona Robinson、Christoph J. Dürr、Jitendra R. Harjani
DOI:10.1039/b926885e
日期:——
A new kind of switchable solvent, a switchable-hydrophilicity solvent, is hydrophobic and has very low miscibility with water when in air but is hydrophilic and has complete miscibility with water when under an atmosphere of CO2. We report here the first example of such a solvent, N,N,N′-tributylpentanamidine. Solvents such as these could be used for the extraction of low-polarity organic products, such as vegetable oils, followed by the removal of the solvent from the product by carbonated water. Carbonated water is able to extract the solvent from the product because the CO2 converts the solvent to its hydrophilic form. The solvent can then be separated from the carbonated water upon removal of the CO2, because this removal triggers the conversion of the solvent back to its hydrophobic, water-immiscible form. Importantly, distillation is not required for removal of the solvent from the product.
一种新型可切换溶剂--可切换亲水性溶剂--在空气中是疏水性的,与水的混溶性很低,但在二氧化碳环境下是亲水性的,与水完全混溶。我们在此报告了这种溶剂的第一个例子,即 N,N,N′-三丁基戊脒。这类溶剂可用于萃取植物油等低极性有机产品,然后用碳酸水去除产品中的溶剂。碳酸水能够从产品中萃取出溶剂,因为二氧化碳会将溶剂转化为亲水形式。移除二氧化碳后,溶剂又可以从碳酸水中分离出来,因为移除二氧化碳后,溶剂又会转化为疏水性、不溶于水的形式。重要的是,从产品中去除溶剂不需要蒸馏。
Orthoamide und Iminiumsalze, IC. Synthese und Reaktionen von <i>N,N,N′,N′,N′′-</i>Pentaalkyl-<i>N′′</i>-[2-(<i>N,N,N′,N′,N′′-</i>pentaalkylguanidinio)ethyl]-guanidiniumsalzen
作者:Willi Kantlehner、Ioannis Tiritiris、Wolfgang Frey、Ralf Kreß
DOI:10.1515/znb-2019-0230
日期:2020.8.27
Abstract Bis[bis(dibutylamino)methylen]hydrazine 8 is prepared from N,N,N′,N′-tetrabutylchloroformamidinium chloride (4c) and hydrazine. Bromine transforms 8 to the heterocyclic guanidinium salt 15a which is isolated as tetraphenylborate. From N,N,N′,N′-tetraalkylchloroformamidiniumchlorides and ethylendiamine the diguanidines are prepared which are alkylated to give diguanidinium salts, From these
摘要 双[双(二丁基氨基)亚甲基]肼 8 由 N,N,N',N'-四丁基氯甲脒氯化物 (4c) 和肼制备而成。溴将 8 转化为杂环胍盐 15a,以四苯基硼酸盐的形式分离。由 N,N,N',N'-四烷基氯甲脒氯化物和乙二胺制备二胍,将其烷基化得到二胍盐,从这些盐中可以通过阴离子复分解与四苯基硼酸盐-、碘化物-、六氟磷酸盐-、三氟甲磺酸盐-,双(三氟甲磺酰基)亚胺和三氰甲胺作为抗衡阴离子。化合物15和17b的结构由晶体结构分析证实。