Process for making ω-chloro-2,3,4-trihydroxyacetophenone
8-Methoxypsoralen is prepared in six steps from pyrogallol including condensation of pyrogallol with a two-fold excess of chloroacetic acid with boron trifluoride hydrogenation of 6,7-dihydroxy-2,3-dihydrobenzofuran and dehydrogenation of 2,3-dihydroxanthotoxin. Improvements in these three steps lead to a marked overall increase in yield.
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(2008/06/13)
8-Methoxypsoralen
8-Methoxypsoralen is prepared in six steps from pyrogallol including hydrogenation of 6,7-dihydroxy-2,3-dihydrobenzofuran and dehydrogenation of 2,3-dihydroxanthotoxin. Improvements in these two steps lead to a marked overall increase in yield.
-
(2008/06/13)
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