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Original Articles

PHOSPHOR(III)-VERBINDUNGEN UNGEWÖHNLICHER KOORDINATION, 2.1 ADDITION VON TERT-BUTYLLITHIUM AN 2H-1,2,3-DIAZAPHOSPHOLE

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Pages 97-104 | Received 04 Apr 1984, Published online: 13 Dec 2006
 

Abstract

The 2H-1,2,3-diazaphospholes 1a and b undergo 1,2-addition with tert-butyllithium onto the P/C-double bond under the formation of the lithium derivatives 6a and b, which are transformed into 3-tert-butyl-3,4-dihydro-1,2,3-diazaphospholes with formic acid (67) or tert-butylchloride (687). The lithium compound 6b may be methylated, silylated or carboxylated in the 4-position under the formation of trans-substitution products [10a(A). 10b(A) and 11a(A)]. Some 3,4-dihydro-1,2,3-diazaphospholes are oxidized at the phosphorus atom with hydrogen peroxide or oxygen, sulfur and selenium (12a-g).

Die 2H-1,2,3-Diazaphosphole 1a und b gehen mit tert-Butyllithium 1,2-Addition an die P/C-Doppelbindung unter Bildung der Lithiumderivate 6a und b ein, die mit Ameisensäure (6 → 7) oder tert-Butylchlorid (6 → 8 → 7) in 3-tert-Butyl-3,4-dihydro-1,2,3-diazaphosphole umgewandelt werden können. Die Lithiumverbindung 6b läßt sich in 4-Position methylieren, silylieren und carboxylieren, wobei trans-Substitutionsprodukte [10a(A), 10b(A) und 11a(A)] entstehen. Einige 3,4-Dihydro-1,2,3-diazaphosphole werden am Phosphor mit Wasserstoffperoxid bzw. Sauerstoff, Schwefel und Selen aufoxidiert (12a-g).

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