24407-32-7Relevant articles and documents
Synthesis of N-unsubstituted cyclic imides from anhydride with urea in deep eutectic solvent (DES) choline chloride/urea
Liu, Luxiao,Zhang, Hong-Yu,Yin, Guohui,Zhang, Yuecheng,Zhao, Jiquan
, p. 1351 - 1357 (2019/11/19)
N-Unsubstituted cyclic imides were readily synthesized in deep eutectic solvent (DES) choline chloride (ChCl)/urea from anhydrides with urea. Urea serves as both a DES component and a nitrogen source, which endows the protocol with advantages of smooth reaction, easy separation of products, simple recovery and recycling of ChCl/urea.
Grinding imidation of anhydrides on smectite clays as recyclable and heterogeneous catalysts under solvent-free conditions
Marvi, Omid
, p. 3501 - 3504 (2017/08/14)
Imidation of various anhydrides employing solvent-free grindstone technique using smectite clays as recyclable and green catalysts was examined and obtained excellent yields.
An expedient and convenient approach for one-pot synthesis of 1H-isoindole-1,3(2H)-diones
Ekhtiari, Zeinab,Havasi, Forugh,Nikpour, Farzad
, p. 941 - 944 (2016/10/13)
An easy and expedient method for the one-pot synthesis of 1H-isoindole-1,3(2H)-diones has been developed by the reaction of the corresponding cyclic anhydrides with guanidinium chloride as a nitrogen source in the presence of FeCl3 as a catalyst under mild reaction conditions.
A facile and convenient synthesis of 1H-isoindole-1,3(2H)-diones
Nikpour, Farzad,Kazemi, Samira,Sheikh, Davood
, p. 1559 - 1564 (2007/10/03)
A facile synthesis of 1H-isoindole-1,3(2H)-diones (3a-h) has been developed by the reaction of the corresponding anhydrides (1a-h) with potassium cyanate (4a) or sodium thiocyanate (4b). The reactions were carried out in neutral media under reflux or under microwave irradiation without use of catalyst. Good to excellent yields of the products were obtained in high purity with very simple work-up.{A figure is presented}.
Benzocyclobutenes. Part 4. Synthesis of Benzocyclobutene-1,2-diones by Pyrolytic Methods
Gould, Ken J.,Hacker, Nigel P.,McOmie, John F. W.,Perry, David H.
, p. 1834 - 1840 (2007/10/02)
Oxidation of the cyclic hydrazides prepared from phthalic anhydrides in the presence of anthracene gives the corresponding Diels-Alder adducts which, on flash vacuum pyrolysis, give benzocyclobutene-1,2-dione (BBD) and its 4-chloro, 3,6- and 4,5-dichloro, 4,5-dibromo, and 4,5-dimethyl derivatives in 75-98percent yield.Cyclobuta- and cyclobuta-naphthalene-1,2-dione as well as cyclobuta- and cyclobuta-pyridine-1,2-dione have been prepared similarly; the last three of these diones are very unstable.Cyclobutanaphthalene-1,2-dione has also been made by pyrolysis of benzindene-1,2,3-trione.Attempts to make thiophen and furan analogues of BBD from appropriate anthracene adducts failed as did attempts to make tetrachloro- and tetrabromo-derivatives of BBD by the pyrolysis of tetrahalogenophthalimidosulphoximides.
Halobenzoyl tetrahalophthalimides
-
, (2008/06/13)
This invention discloses fire retardant chemical compounds of the formula SPC1 Wherein X and Y are each chlorine or bromine and n is an integer from 2 to 5 which are useful in polymeric compositions.