When treated with cyanoacetic ester in conc. H2SO4 1-(4-hydroxy-3-methoxyphenyl)- and 1-(3-hydroxy-4-methoxyphenyl)-2-methylpropan-1-ol form ethyl 7-hydroxy-6-methoxy-3,3-dimethyl(or 6-hydroxy-7-methoxy- 3,3-dimethyl)-1,2,3,4-tetrahydroisoquinolylidene-1-acetate.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 3, pp. 421-425, March, 2009.
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Shklyaev, Y.V., Vshivkova, T.S. & Tolstikov, A.G. Synthesis of 7- (or 6-)hydroxy derivatives of 3,3-dimethyl-3,4-dihydroisoquinoline. Chem Heterocycl Comp 45, 341–344 (2009). https://doi.org/10.1007/s10593-009-0268-9
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DOI: https://doi.org/10.1007/s10593-009-0268-9