Synthesis, structure, and heck cyclization of the syn- and anti-atropisomers of N-acyl-N-(4-methyl-3,6-dihydro-2H-pyran-3-yl)-2-iodo-4,6-dimethylaniline
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The reaction of 2-iodo-2,4-dimethylaniline with 3,4-dibromo-4-methyltetrahydro-2H-pyran, followed by treatment with acetyl bromide or 4-nitrobenzoyl chloride, gave syn- and anti-atropisomers of N-(2-iodo-4,6-dimethylphenyl)-N-(4-methyl-3,6-dihydro-2H-pyran-3-yl)acetamide and N-(2-iodo-4,6-dimethylphenyl)-N-(4-methyl-3,6-dihydro-2H-pyran-3-yl)-4-nitrobenzamide. Heating of the acetamide derivative with palladium(II) acetate in the presence of copper(II) acetate and N,N,N′,N′-tetramethylethane-1,2-diamine resulted in heterocyclization to N-acetyl-4a,6,8-trimethyl-1,4a,9,9a-tetrahydropyrano[3,4-b]indole.
KeywordsEtOAc Dimethylaniline Dimethylphenyl Acetyl Bromide Nitrobenzamide
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- 4.Zhang, J.-W., Cai, Q., Shi, X.-B., Zhang, W., and You, S.-L., Synlett, 2011, p. 1239.Google Scholar
- 6.Kosynkin, D.V. and Tour, J.M., Org. Lett., 2001, vol. 3, p. 991.Google Scholar
- 7.Allen, F.H., Kennard, O., Watson, D.G., Brammer, L., Orpen, A.G., and Taylor, R., J. Chem. Soc., Perkin Trans. 2, 1987, p. S1.Google Scholar
- 8.APEX2 and SAINT, Madison, Wisconsin, USA: Bruker AXS, 2005.Google Scholar