A highly selective process scheme was developed to synthesize α-bromoaldehydes by regulating the important process parameters from a reaction-engineering point of view. Thus, α-bromobutyraldehyde and α-bromoheptaldehyde were synthesized in very high selectivity starting with butyraldehyde and heptaldehyde. In the bromination reaction at 40% conversion ratio, the selectivity was as high as 98% by using liquid bromine as the ...