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sir plz give me the explanation about stephen's reaction

6 years ago


Answers : (3)


Stephen's reaction or Stephen Aldehyde Synthesis:

The Stephen's reaction is used to prepare aldehydes from nitriles or cyanides. The reduction of nitriles with stannous chloride and hydrogen chloride in ethyl acetate solvent produces imine intermediate. The hydrolysis of this intermediate with water gives the corresponding aldehyde.


           SnCl2                                            H2O

R-CN -----------------> [R-CH=NH2+ ][Cl-] ---------> R-CHO



Example :

Methyl cyanide to acetaldehyde preparation by stephen’s reaction is as follows:


CH3CN + 2[H] ---(SnCl2/HCl)----------> CH3-CH-NH ---(H2O)----> CH3CHO + NH3

6 years ago
Sir, can you explain with reaction mechanism involved  in reduction of azo compounds using stannous(II)chloride in presence of concentrated hydrochloric acid.
one year ago
Kindly mention your reference book
one year ago

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