迫 Experimental principle 1.Two molecule of carbonyl compounds with a-H. can condense to form B-hydroxy aldehyde(ketone). While rasing the reaction temperature, will form further form a, B unsaturated aldehyde(ketone) 2. A non-aH aromatic aldehyde can condense with carbonyl compounds containing a-h to form o, B-unsaturated aldehyde (ketone), it is so-called Clasien-Schmidt reaction1.Two molecule of carbonyl compounds with α-H, can condense to form β-hydroxy aldehyde(ketone). While rasing the reaction temperature, will form further form α,β- unsaturated aldehyde (ketone). 2. A non- α-H aromatic aldehyde can condense with carbonyl compounds containing α-H to form α,β-unsaturated aldehyde (ketone), it is so-called Clasien-Schmidt reaction. Experimental principle