D. Damour

Synthese et reactivite de silanes propargyliques ω-Fonctionnels : preparation de vinylidene-3 oxolannes, oxannes, oxepannes et oxocannes

Abstract The ω-silyloxypropargyltrimethylsilanes regiospecifically react with aliphatic and aromatic aldehydes to lead to vinylidene oxygen-containing heterocycles,such as 3-vinylidene oxolanes, oxanes, oxepanes and oxocanes.

Synthese regiospecifique d'allenes terminaux a partir de propargyltrimethylsilanes simples ou fonctionnels

Abstract Protodesilylation of varied propargyltrimethylsilanes, using boron trifluorideacetic acid as reagent, give regiospecifically terminal allenes with very good yields. Yet, particular ω-functional propargyltrimethylsilanes may lead to vinylsilanes resulting from a ring-closing cyclisation reaction.

Synthese d'heterocycles oxygenes a groupe vinylidene exocyclique par voie organosilicique - partie II: Preparation de vinylidene-5 dioxannes-1,3

Abstract The α-silyloxypropargyltrimethylsilanes regiospecifically react with aliphatic aldehydes to lead to alkyl-substituted 5-vinylidene-1,3-dioxanes, in a one-pot reaction.

Synthese de vinylidene-3 pyrrolidines, piperidines, perhydroazepines a partir D'ω-monoalkyl-aminopropargyltrimethylsilanes par processus D'aminomethylation-desilylation intramoleculaire

Abstract In acidic medium, the ω-monoalkylaminopropargyltrimethylsilanes regiospecifically reacted with formaldehyde, affording 3-vinylidene nitrogen-containing heterocycles, such as 3-vinylidene pyrrolidines, piperidines and perhydroazepines.

Synthèse régiosélective d'amines α-alléniques par aminométhylation-désilylation de propargyltriméthylsilanes

Abstract A very convenient method to prepare α-allenic amines from propargyltrimethyl-silanes and secondary amines via an aminomethylation-desilylation process is described.

Synthèse par voie organosilicique d'hétérocydes comportant deux hétéroatomes et un groupe vinylidène exocyclique

Abstract The ν-silyloxypropargyltrimethylsilanes: Me 3 SiCH 2 CCCH 2 X(CH 2 ) n OSiMe 3 (X = O, S, NR; n = 1, 2, 3) react regiospecifically with aliphatic aldehydes to give new vinylidene heterocyclic compounds, such as 6-alkyl-5-vinylidene-1,3-dioxanes, 7-alkyl-6-vinylidene-1,4-dioxepanes, 7-alkyl-4-thia-6-vinylidene-1-oxepanes, 7-alkyl-4-aza-6-vinylidene-1-oxepanes, and 8-alkyl-7-vinylidene-1,5-dioxocanes.