Réactions de cycloaddition-1,4 de germylènes cycliques soufrés et oxygénés sur divers hétéro-1,3 butadiènes siliciés ou germaniés et la 3,5-di t-butylorthoquinone
摘要:
Cycloaddition reactions of 1,2-dithiolane or 1,2-oxathiolanegermanediyls with 3,4-bis(methylene)sila- and germacycloalkanes are reported. Similarly, 3,5-di t-butylorthoquinone undergoes 1,4-cycloaddition with these heterocyclic germylenes. The reactivity of some new dimetalapentalenes with bromine or dichlorodicyanoquinone (DDQ) is also described.