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Shapiro reaction, modified

AUenic dianions.2 The allenic dianions 3a and 3b can be generated via a modified Shapiro reaction from la and lb by treatment with n-butyllithium in DME... [Pg.287]

Amino-alkyl amides form amidines reversibly on heating and under acidic conditions. In the latter case amidines are proposed as intermediates in transamidation reactions. A full paper on a modified Shapiro reaction of hydrazones derived from secondary or-keto-amides has appeared. Ultra sound is reported to produce improvements in the heterogeneous reaction between amides and P4Sio. °... [Pg.144]

So interpretation of the B-H vibration bands confirmed the different reactions of diborane with the hydroxylic surface groups put forward by Shapiro and Weiss.35,36,49 In addition the infrared analysis of the modified surface revealed (1) the reaction of B2H6 with siloxanes, explaining the low hydrolysis ratios found under certain reaction conditions and (2) the equilibration reaction existing between B2H6 in the gas phase and the monodentate groups formed through reaction of BH3 with a surface hydroxyl. [Pg.331]

See other pages where Shapiro reaction, modified is mentioned: [Pg.271]    [Pg.248]    [Pg.940]    [Pg.781]    [Pg.783]    [Pg.781]    [Pg.783]    [Pg.322]    [Pg.337]    [Pg.303]    [Pg.223]   
See also in sourсe #XX -- [ Pg.460 , Pg.461 ]

See also in sourсe #XX -- [ Pg.460 , Pg.461 ]



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Modified reaction

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