A one-pot synthesis of coumarins from dipotassium O-methoxybenzylidenemalonates
摘要:
o-Methoxybenzylidenemalonates 1, which are available from o-methoxybenzaldehydes and diethyl malonate, were hydrolysed to the dipotassium malonates 2. Treatment of the salts 2 with trifluoroacetic acid-trifluoroacetic anhydride gave the title coumarins by a demethylative ring-closure reaction in 60-80% yield.
A one-pot synthesis of coumarins from dipotassium O-methoxybenzylidenemalonates
摘要:
o-Methoxybenzylidenemalonates 1, which are available from o-methoxybenzaldehydes and diethyl malonate, were hydrolysed to the dipotassium malonates 2. Treatment of the salts 2 with trifluoroacetic acid-trifluoroacetic anhydride gave the title coumarins by a demethylative ring-closure reaction in 60-80% yield.
A one-pot synthesis of coumarins from dipotassium O-methoxybenzylidenemalonates
作者:Osmo E. O. Hormi、Carita Peltonen、Riitta Bergström (née Moisio)
DOI:10.1039/p19910000219
日期:——
o-Methoxybenzylidenemalonates 1, which are available from o-methoxybenzaldehydes and diethyl malonate, were hydrolysed to the dipotassium malonates 2. Treatment of the salts 2 with trifluoroacetic acid-trifluoroacetic anhydride gave the title coumarins by a demethylative ring-closure reaction in 60-80% yield.