作者:M. Amaravathi、B. Rajitha、M. Kanakalingeswara Rao、P. Sitadevi
DOI:10.1002/jhet.5570440411
日期:2007.7
meso-Tetrakis(4-chlorocoumarin-3-yl)porphyrins were prepared by condensation of corresponding 4-chlorocoumarin-3-carboxaldehydes and pyrrole in the presence of trifluoro acetic acid (TFA) in dichloromethane followed by oxidation with 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ). These porphyrins exhibited the atropisomerism due to ortho substituent of meso aryl groups. The atropisomers of meso-tetrakis(4-chl
内消旋-四(4-氯香豆素-3-基)卟啉是通过在二氯甲烷中在三氟乙酸(TFA)存在下缩合相应的4-氯香豆素-3-羧醛和吡咯,然后用2,3-二氯-氧化制备的。 5,6-二氰基-1,4-苯醌(DDQ)。这些卟啉由于内消旋芳基的邻位取代而表现出阻转异构性。分离并通过1 H-nmr光谱鉴定了内消旋-四(4-氯-6-甲基香豆素-3-基)卟啉的阻转异构体。合成了这些卟啉的锌配合物,并通过ms,1 H nmr,ir和uv-vis光谱进行了表征。