Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Oxirane derivatives

The chiral oxirane derivative 185 (R = 4-BrCgH4CH2) and vinylmagnesium bromide yield the allylic amine 186 allylmagnesium bromide reacts in an analogous fashion192. [Pg.569]

Amides [41,44], thioamides [41 ] and amidines [45] are converted into nitriles by the reaction with dichlorocarbenes generated by Makosza s procedure (Table 7.16). Under similar conditions, monosubstituted and A.A-disubstituted ureas are converted into cyanamides (Table 7.17) JV,(V -disubstituted ureas produce carbodi-imides in low yield [41,46,47]. /V-Carbamoyl derivatives of dibenzo[/ /]diazepines and the related 10, l l-oxirane derivatives are converted into the corresponding... [Pg.353]

In contrast to the foregoing observations, there are other reactions that generate oxirane derivatives as intermediates that undergo further transformations to a variety of compounds. For example, oxidation of ketenes 15 gives polyesters 17 via the intermediacy of oxiranones 16. The conversion 15 16 probably involves a nucleophilic attack of oxygen end of the... [Pg.10]

Other examples include conversion of ketones to a-hydroxydimethylace-tals 1 (Scheme la), which result from a nucleophilic ring opening of the intermediate oxiranes 18 by methoxide ions, as shown in Scheme 10. Interestingly, it is possible to isolate such oxirane derivatives in a few cases such as that shown in Eq. (7) (85S326). [Pg.11]


See other pages where Oxirane derivatives is mentioned: [Pg.96]    [Pg.99]    [Pg.19]    [Pg.295]    [Pg.164]    [Pg.64]    [Pg.36]    [Pg.278]    [Pg.527]    [Pg.534]    [Pg.109]    [Pg.109]    [Pg.109]    [Pg.111]    [Pg.113]    [Pg.115]    [Pg.118]    [Pg.119]    [Pg.121]    [Pg.122]    [Pg.123]    [Pg.125]    [Pg.127]    [Pg.129]    [Pg.131]    [Pg.133]    [Pg.135]    [Pg.137]    [Pg.139]    [Pg.141]    [Pg.143]    [Pg.145]    [Pg.147]    [Pg.149]    [Pg.151]    [Pg.153]    [Pg.155]    [Pg.157]    [Pg.159]    [Pg.161]    [Pg.163]    [Pg.165]    [Pg.167]    [Pg.167]    [Pg.169]   
See also in sourсe #XX -- [ Pg.271 ]




SEARCH



Aldoses, oxirane derivatives

Endocyclic oxirane derivatives (epoxy sugars

Exocyclic Oxirane Derivatives 5,6-Anhydrohexofuranoses

Exocyclic oxirane derivatives

Oxirane derivatives, of aldoses

Oxirane derivatives, ring-opening reactions

Oxirane synthesis derivatives

Oxirane, and its derivatives

Spiro-oxirane ring derivatives

Sugars oxirane sugar derivatives from

Williams, Neil R., Oxirane Derivatives

Williams, Neil R., Oxirane Derivatives of Aldoses

© 2024 chempedia.info