Metal-free phosphonation of heteroarene N-oxides with trialkyl phosphite at room temperature
作者:Ming-Tao Chen、Xia You、Li-Gang Bai、Qun-Li Luo
DOI:10.1039/c7ob00402h
日期:——
A new protocol is described for the conversion of heteroarene N-oxides to heteroarylphosphonates through in situ activation with bromotrichloromethane. The N-oxides of isoquinoline, quinoline, quinoxaline and 1,10-phenanthroline were fast transformed into the corresponding heteroarylphosphonates in up to 92% yield under mild conditions in the absence of solvent and metal catalysts. The good functional
Synthesis of Diethyl Pyridin-2-ylphosphonates and Quinolin-2-ylphosphonates by Deoxygenative Phosphorylation of the Corresponding N-Oxides
作者:Sang-Jin Lee、Hyun-Soo Kim、Hae-Won Yang、Byung-Woo Yoo、Cheol Min Yoon
DOI:10.5012/bkcs.2014.35.7.2155
日期:2014.7.20
E-mail: cmyoon@korea.ac.krReceived November 4, 2013, Accepted March 7, 2014Key Words : Pyridine N-oxide, Ethyl chloroformate, Triethyl phosphite, Diethyl pyridin-2-ylphosphonateDialkyl pyridin-2-ylphosphonates widely used as corro-sion inhibitors, dispersing and emulsifying agents, antistaticsand lubricant additives in various technological fields
Microbiocidal process employing full quaternary nitrogen-heterocyclic
申请人:Petrolite Corporation
公开号:US04101654A1
公开(公告)日:1978-07-18
Quaternary nitrogen-heterocyclic phosphonates wherein the phosphonate group is ortho- or para- to the nitrogen heterocyclic group, where the compounds are characterized as follows: ##STR1## WHEREIN THE DOTTED LINE REPRESENTS A CYCLIC STRUCTURE WHICH CYCLIC STRUCTURE MAY BE THE SOLE CYCLIC STRUCTURE, OR MAY BE ATTACHED TO OTHER CYCLIC GROUPS, WHERE R is a hydrocarbon or a substituted hydrocarbon group such as alkyl, aryl, alkaryl, aralkyl, etc., and X is an anion such as halogen, a sulfite, a sulfate, s sulfonate-containing group, etc. These nitrogen-heterocyclic phosphonates are prepared by reacting an aromatic nitrogen-heterocyclic compound, wherein the nitrogen atom is in the form of a quaternary alkoxy derivative (N-OR hereinafter defined) with a phosphite salt, preferably in the form of an ester of the phosphite, as exemplified by the following equation: ##STR2## Quaternaries of these compounds are prepared by further reaction with a quaternizing agent. These compounds which may be characterized as quaternaries of phosphonates of nitrogen-heterocyclics have many uses including their use as biocides, such as bacteriocides, herbicides, corrosion inhibitors, chelating agents, etc.