16597-38-9Relevant articles and documents
Macroheterocycles; VI. A Convenient Synthesis of Cyclic N,N'-Dialkylureas
Bogatsky, A. V.,Lukyanenko, N. G.,Kirichenko, T. I.
, p. 464 - 465 (1982)
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Catalytic oxidative carbonylation of primary and secondary α,ω-diamines to cyclic ureas
McCusker, Jennifer E.,Grasso, Cara A.,Main, Andrea D.,McEiwee-White, Lisa
, p. 961 - 964 (2008/02/09)
(matrix presented) Primary and secondary diamines can be catalytically carbonylated to cyclic ureas using W(CO)6 as the catalyst, I2 as the oxidant, and CO as the carbonyl source. Preparation of five-, six-, and seven-membered cyclic ureas from the diamines RNHCH2(CH2)nCH2NHR (n = 0-2; R = H, Me) and RNHCH2CH2NHR (R = Et, i-Pr, Bz) was achieved in moderate to good yields.
MACROHETEROCYCLES. XV. SYNTHESIS AND ION-SELECTIVE CHARACTERISTICS OF CYCLIC N,N'-DIALKYLUREAS
Bogat-skii, A. V.,Luk'yanenko, N. G.,Kirichenko, T. I.,Limich, V. V.,Karpenko, L. P.
, p. 89 - 95 (2007/10/02)
A convenient method is proposed for the production of cyclic N,N'-dialkylureas by the reaction of cyclic thioureas with alkyl halides in the presence of aqueous alkali and phase-transfer catalysts.It was established that the reaction takes place through the formation of isothioureas with subsequent alkylation of the nitrogen atoms and hydrolytic cleavage of the obtained N,N'-dialkylthiouronium salt.This method was used for the synthesis of macrocyclic N,N'-dimethylpolyoxyethyleneureas.The ion-selective characteristics of the obtained crown compounds were studied.
