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4.5- Dimethylene-2-oxazolidinones

Tamariz and coworkers [42] have described a versatile, efficient methodology for preparing N-substituted-4,5-dimethylene-2-oxazolidinones 42 (Figure 2.5) from a-diketones and isocyanates and have also studied their reactivity in Diels-Alder reactions. This is a method for synthesizing polycyclic heterocyclic compounds. Some of the reactions of diene 42 are summarized in Scheme 2.18. The nitrogen atom seems to control the regiochemistry of the reaction. [Pg.44]

Fig. 2.110. Synthesis of [Ir(Tp )(l-aryl-4,5-dimethylene-2-oxazolidinone)] and their reaction with aldehydes. Fig. 2.110. Synthesis of [Ir(Tp )(l-aryl-4,5-dimethylene-2-oxazolidinone)] and their reaction with aldehydes.
Dimethylene-2-oxazolidinones. Condensation of the diketone with N- ilkyl- or A -aryl isocyanates provides an access to the heterocycles in one step. [Pg.68]


See other pages where 4.5- Dimethylene-2-oxazolidinones is mentioned: [Pg.10]    [Pg.197]    [Pg.10]    [Pg.197]   
See also in sourсe #XX -- [ Pg.68 ]




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