1982
DOI: 10.1002/cber.19821151006
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Umsetzungen von Metall‐ und Metalloidverbindungen mit mehrfunktionellen Molekülen, XXXVI. Neue Synthesewege zu offenkettigen und cyclischen N‐Borylharnstoffen und ‐thioharnstoffen

Abstract: N,N,N'-Triorganylharnstoffe bzw. -thioharnstoffe werden entweder lithiiert oder nichtlithiiert rnit Bromdimethylboran umgesetzt. Im ersten Fall erhalt man die monomeren N-Borylharnstoffe bzw. -thioharnstoffe 1 -7; im zweiten treten als Nebenprodukte 1,3,5,2-Triazaborin-4,6-dion-(8, 13), 1,3,5,2,6-0xadiazadiborin-4-on-(10) sowie 1,3,5,7,2-Tetrazaborocin-4,6,8-trion-Derivate (9,12) auf. Mit N,N'-Diorganylharnstoffen bzw. -thioharnstoffen wurden folgende Synthesewege untersucht: 1. Lithiierung mit n-Butyllithium … Show more

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Cited by 13 publications
(3 citation statements)
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“…19 Although the present NMR data for 4a agree well with those reported in the literature, there is a significant discrepancy in the melting point datum (here: 78-80 'C; lit. : 19 105-109 'C). Similarly, 4d has also been obtained by treatment of N, N'--dimethylurea with nbutyllithium and subsequent reaction with C 6 H 5 BC 2 .…”
Section: Introductionsupporting
confidence: 88%
See 1 more Smart Citation
“…19 Although the present NMR data for 4a agree well with those reported in the literature, there is a significant discrepancy in the melting point datum (here: 78-80 'C; lit. : 19 105-109 'C). Similarly, 4d has also been obtained by treatment of N, N'--dimethylurea with nbutyllithium and subsequent reaction with C 6 H 5 BC 2 .…”
Section: Introductionsupporting
confidence: 88%
“…Similarly, 4d has also been obtained by treatment of N, N'--dimethylurea with nbutyllithium and subsequent reaction with C 6 H 5 BC 2 . 19 Again, the NMR spectra of the reported 19 material and those of the present product were essentially identical, but there is a substantial difference in the melting point of the products (here: 98-102 'C; lit. : 19 144-148 C).…”
Section: Introductionmentioning
confidence: 52%
“…Es sind cyclische Biuret-Verbindungen von Bor [9][10][11][12], Silicium [10], Arsen [13] und Nickel [14] bekannt. Diese Verbindungen wurden nicht immer durch Umsetzungen von Biuret-Verbindungen, sondern auch aus Harnstoffen erhalten.…”
Section: Introductionunclassified