1,2,2,4-Tetramethyldihydroquinoline (TMDQ) is formylated at the 6-position and the resulting quinoline aldehyde is condensed with 3-methyl-1-phenyl-1H-pyrazol-5(4H)-one to obtain a merocyanine 6-pyrazolinyl TMDQ.
1,2,2,4-四甲基二氢喹啉(TMDQ)在6位进行甲酰化反应,得到喹啉醛,然后与3-甲基-1-苯基-1H-吡唑-5(4H)-酮缩合,得到一种6-吡唑烷基TMDQ的美洛显色剂。