Synthesis p. 387 - 388 (1990)
Update date:2022-08-03
Topics:
Laschober
Kappe
4-Aryloxy-3-iodocoumarins (4-aryloxy-3-iodo-2H-1-benzopyran-2-one), 4a-c, which are readily available by known procedures starting from 4-hydroxycoumarins 1 a,b and diacetoxyiodobenzenes 2a-c; are cyclized with palladium chloride in triethylamine to yield the coumestanes (6H-benzofuran[3,2-c][1]benzopyran-6-ones) 5a-c.
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Doi:10.1039/b006759h
(2000)Doi:10.1016/j.steroids.2011.01.005
(2011)Doi:10.1246/bcsj.63.640
(1990)Doi:10.1039/P29900000625
(1990)Doi:10.1055/s-1981-29479
(1981)Doi:10.1021/jo00309a013
(1990)
