Réactions d'addition-élimination à partir d'hétérocycles germaniés du type R2Ge. II. Les germa-2-diazolidines-1,3

Addition-elimination reactions from germanium heterocycles . II. 2-Germa-1,3-diazolidines (X ? Y ? NMe). The reactivity of 2-Germa-1,3-diazolidines with unsaturated compounds such as heterocumulenes (CS₂, PhNCO, PhNCS) and with carbonyl compounds (aldehydes and ketones) has been investigated. Generally the formation of mono- and diinsertion derivatives is observed. The elimination reactions of (Et₂GeO)_n and (Et₂GeS)₃ from these addition derivatives lead to corresponding carbon diazolidines. The mechanism of these addition-elimination reactions is precised. The interest of these reactions in organic synthesis is underlined.