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1,3-Dihydro-1,3,2-diazaborole- and 1,3,2-diazaborolidine compounds from alkali metal complexes of aromatic nitrogen heterocycles and dichloro(diisopropylamino)borane 1)

✍ Scribed by Walter Maringgele; Dietmar Bromm; Anton Meller

Book ID
104203555
Publisher
Elsevier Science
Year
1988
Tongue
French
Weight
305 KB
Volume
44
Category
Article
ISSN
0040-4020

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✦ Synopsis

Reactions of complexes of Isoquinoline, 2,2'-dipyrldyl and phenanthridine and sodium or potassium with dichIoro(diisopropylamino)borane lead to new heterocycles containfng dlazaborole and diazaborolidine ring systems. The corresponding reaction starting from quinoline gives bis(l,4-dihydra-quinolInyl-l)diIsopropyIaminaborane, while with indole bis(l-indoIyI)diisopropylaminoborane Is the raduct. The new compounds are characterized by spectroscopic (MS; NMR 1H, lfB, 13C, 15N) data and elemental analyses.

Recently we reported carbene analogous reactions of the dehalogenation product of dIchloro(diIsopropylamI-

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Interaction of alkali metals with unsaturated heterocyclic compounds. The reductive metallation of 2,3,5,6-tetraphenylpyrazine and the synthesis of 1,2-dihydro-1,4-diazine derivatives
✍ Şeniz Kaban; NΓΌket Γ–cal πŸ“‚ Article πŸ“… 2010 πŸ› Elsevier Science 🌐 English βš– 458 KB

## Abstract Treatment of 2,3,5,6‐tetraphenylpyrazine (1) with sodium in tetrahydrofuran effected the formation of monomeric dianion 2. The chemical behaviour of this new disodium adduct was characterized by a variety of reagents. Generally, the protonation (water), alkylation (methyl iodide and ben