摘要:
Addition of the allenic amine H2C = C = CHNMe2 and the corresponding N-morpholinoallene to a solution of an aromatic or heteroaromatic aldehyde, RCH = O, and lithium bromide in tetrahydrofuran followed by treatment of the reaction mixture with a small amount of acetic acid at elevated temperatures affords the aldehydes RCH = C(CH2NR'2)CH = O (NR'2 = NMe2 or morpholino) in reasonable yields.