Synthetic Communications p. 3678 - 3682 (2011)
Update date:2022-08-22
Topics:
Bhunia, Sankar C.
Patra, Gopal C.
Pal, Sudhir C.
Improved yields of aldehydes from the Reimer-Tiemann reaction of coumarin and two of its derivatives, namely 7-methylcoumarin and 3,4-benzocoumarin, are obtained by carrying the reaction in a two-step procedure. Using crown ether as phase transfer catalyst, a further improvement in the yield of products is achieved. Additionally, coumarin and 7- methylcoumarin are shown to give dialdehydes under this condition. Dialdehydes are reported for the first time from the Reimer-Tiemann reaction. Copyright Taylor & Francis Group, LLC.
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