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Reactions of Metal and Metalloid Compounds with Polyfunctional Molecules, XXXVIII. The Reaction of Ethanediamides with Bromodimethylborane
Maringgele, Walter,Sheldrick, George M.,Meller, Anton,Noltemeyer, Mathias
, p. 2112 - 2131 (2007/10/02)
Reactions of symmetrically substituted N,N'-dialkyl-(diaryl)ethanediamides A with bromodimethylborane are investigated.Reactions in the molar ratio of 1:2 yield the 2,6-dioxonia-4,8-diaza-3,7-diboratabicyclooctanes 1a-j, the N,N'-bis(dimethylboryl)-N,N'-diorganylethanediamides 4a, b, and the equilibrium mixtures 3a-d.By-products are 2-oxonia-4-oxa-6-azonia-8-aza-3,7-diboratabicyclooctanes 2a-j.By the reaction of N,N'-diorganylethanediamides with bromodimethylborane in the molar ratio 1:1 the 1-oxonia-3-aza-2-boratacyclopentan-4-one derivatives 5a-e, N-(dimethylboryl)-N,N'-diorganylethanediamides 6a-c, the equilibrium mixtures 7a-d, and the 5-(alkylamino)-4-(alkylimonio)-2,2-dimethyl-1-oxonia-3-oxa-2-boratacyclopentane bromides 8a-h are obtained.X-ray analyses have been carried out for 1a, 5a, e, and 8b.
