[xshadow]

How can  reduce the C=O bond  in the presence of C=C bonds NOT conjugated to carbonyl ??

For example:

CHO-CH₂-CH₂-HC=CH-CH=CH₂ ?

Ps: reduce C=O to CH₂ , not to alcohol

Can I use wolff kishner?
I suppose I can't use hydrogenation because of C=C
Also NaBH4  is not good here because I get an alcohol. Not a total reduction

Another way can be mozingo reaction? Using a dithiol and then Ni raney...but I don't know if also the C=C will be reduced...usually H2 with Ni raney can reduce alkenes

Thanks

[rolnor]

I think you can use a deactivated Raney-Ni to reduce dithioacetal without reducing the alkene.

[xshadow]

I think you can use a deactivated Raney-Ni to reduce dithioacetal without reducing the alkene.

ook ,thanks!