How is 2,7-Dimethylquinoline (CAS: 93-37-8) typically synthesized?

2,7-Dimethylquinoline is typically synthesized by the condensation of 2-methylquinoline with formaldehyde in the presence of a strong acid catalyst such as hydrochloric acid. This reaction yields 2,7-dimethylquinoline with good selectivity and a high yield of up to 95%. Other methods include the reduction of 2,7-dimethylquinone or the treatment of 2,7-dimethylisoquinoline with sodium hydride.