桥链含苯并吡喃核的四甲川份菁染料的合成与应用研究

在感光胶片中,使用较多的光谱增感剂为菁染料.这类染料在胶片的保存和加工过程中容易产生灰雾,显影加工处理后卤化银层会残存染料,从而导致版面污染,成为影响产品质量的不利因素.当该类染料作为感红区尤其是红外区的光谱增感剂时,染料的稳定性较差,从而影响胶片的感光性能.     

Synthesis of 2H-chromenes and 1,2-dihydroquinolines from aryl aldehydes, amines, and alkenylboron compounds

The one-step reaction of salicylaldehydes with amines and alkenyl boronic acids or alkenyl trifluoroborates to form 2H-chromenes (2H-1-benzopyrans) has been investigated in more detail and new suitable conditions have been identified, including the use of tertiary amines and protic solvents including water. This process was applied to a concise synthesis of a tocopherol analog. The analogous condensation reaction between 2-sulfamidobenzaldehydes and alkenyl trifluoroborates provides an efficient synthesis of 1,2-dihydroquinoline derivatives.