Réactions d'addition-élmination à partir d'hétérocycles germaniés du type . III. Cas des diéthyl-2,2-germa-2-oxazolidines-1,3 (R = et; X = O; Y = NH, NMe)

✍ Scribed by Gabriel Dousse; Hélène Lavayssière; Jacques Satgé

• Publisher: John Wiley and Sons
• Year: 1976
• Tongue: German
• Weight: 598 KB
• Volume: 59
• Category: Article
• ISSN: 0018-019X
• DOI: 10.1002/hlca.19760590834

✦ Synopsis

Addition-elimination reactions from germanium heterocycles RzGe

. 111. 2,2-Diethyl-2-germa-1,3-oxazolidines (R = Et; X = 0; Y = NH,NMe). -Summary. The reactions of Z,Z-diethyl-Z-germa-l, 3-oxazolidines with heterocumulenes (PhNCO, PhNCS, CSz, COz, CHz=C=O) and carbonyl compounds (aldehydes and ketones) are studied. Generally, monoinsertion derivatives are formed by addition of one molecule of the unsaturated compound accross the Ge-N bond. This bond is always the most reactive center of the molecule. In the case of the carbonyl compounds used, diinsertion may occur in a second step by a further addition across a Gc-0 bond. Generally, this latter reaction is reversible. By thermal elimination of (EtzGeO), or (Et2GcS)s the monoaddition derivatives yield the corresponding oxazolidines and thiooxazolidines. The mechanisms of these reactions are discussed.