作者:Michele M. Jetter、Ned D. Heindel、Jeffrey D. Laskin
DOI:10.1002/jhet.5570270433
日期:1990.5
In a one-step alkylation, ring-closure 7-hydroxycoumarins are condensed in acid media with allyl and homoallyl halides or alcohols to linear 6,7-dihydro-2H,8H-benzo[1,2–6:5,4-b']dipyran-2-ones. If both carbon-6 and carbon-8 are unsubstituted in the original coumarin, cyclization to angular isomers 9,10-dihydro-2H,8H-benzo[1,2–6:3,4-b']dipyran-2-ones competes. These compounds are higher ring homologs
在一步式烷基化中,将闭环的7-羟基香豆素在酸介质中与烯丙基和高烯丙基卤化物或醇缩合成线性6,7-二氢-2 H,8 H-苯并[1,2–6:5,4 - b” ] dipyran -2-酮。如果原始香豆素中的碳6和碳8都未被取代,则环化成角异构体9,10-dihydro-2 H,8 H-苯并[1,2-6:3,4- b' ] dipyran-2 -竞争。这些化合物是通常用于皮肤疾病的光疗中的补骨脂素和当归素的较高环同系物。