How is 8-Quinolinecarbaldehyde (CAS: 38707-70-9) typically synthesized?

8-Quinolinecarbaldehyde can be synthesized via the reduction of 8-quinolinecarboxylic acid using sodium borohydride or similar reducing agents. Another method involves the alkylation of 8-quinolone with formaldehyde followed by hydrolysis. The reaction conditions, such as temperature and catalysts, can vary, but the overall yield is typically around 70-80%. This compound is also prepared through condensation reactions involving quinoline derivatives and aldehydes.