Process for preparing polyalkyl-2-alkoxy-7-hydroxychroman...

Details Process for preparing polyalkyl-2-alkoxy-7-hydroxychroman... Process for preparing polyalkyl-2-alkoxy-7-hydroxychroman...

C - Chemistry, Metallurgy

07

D

260/360

C07D 311/58 (2006.01) C07D 311/20 (2006.01)

Patent

CA 2020232

Process for preparing polyalkyl-2-alkoxy-7- hydroxychroman derivative of the general formula(V): Image (V) wherein R1 denotes lower primary alkyl, R2 denotes hydrogen or lower primary alkyl and R3 denotes loweralkyl, by reacting resorcin with either an aliphatic ketone of the general formula(I): Image (I) wherein R1 and R2 are as defined above, and an alcohol of the formula(II): R3OH (II) wherein R3 is as defined above, in the presence of an acid catalyst, or an aliphatic ketone acetal of the general formula(III): Image (III) wherein R1, R2 and R3 are as defined above, in the presence of an acid catalyst.

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