Conversion of acetaldehyde to butane-1,4-diol How to convert acetaldehyde (ethanal) to butane-1,4-diol. I just tried doing aldol, but it leaves an alkyl group at the end. Also it cannot be done by oxidizing ethane with basic permanganate.
Cross Aldol and add H+






Oxidise Aldehyde to Carboxylic Acid


use any of the reagents 





3.Perform Arndt–Eistert reaction






Use LiAlH4 for reduction of acid to alcohol




And finally you get 1,4-dihydroxybutane.

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