rac-8a'-Methyl-3′,4′,8′,8a'-tetrahydro-2′H-spiro[[1,3]dioxolane-2,1′-naphthalen]-6′(7′H)-one
نویسندگان
چکیده
منابع مشابه
rac-8a’-Methyl-3′,4′,8′,8a’-tetrahydro-2′H-spiro[[1,3]dioxolane-2,1′-naphthalen]-6′(7′H)-one
The title racemic compound, C(13)H(18)O(3), a common precursor in the total synthesis of terpenes, crystallizes with two molecules in the asymmetric unit. The crystal structure is made up of triple chains, formed by weak inter-molecular C-H⋯O contacts, propagating in the a-axis direction.
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In the title compound, C(22)H(21)NOS, the thio-pyran-one ring adopts a chair-like conformation with the substituent in the axial position. The relative configuration of the racemic compound is 3R,7S according to the numbering scheme used in this publication. In the crystal packing, centrosymmetric dimers are built up via N-H⋯O hydrogen bonds, with graph set R(2) (2)(8).
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The title compound, C21H14N2O2, was prepared by Pictet-Spengler cyclization of tryptamine and 4-formyl coumarin. In the mol-ecule, the dihedral angle between the mean planes of the coumarin and β-carboline ring systems is 63.8 (2)°. In the crystal, mol-ecules are linked via N-H⋯N hydrogen bonds, forming chains along the b-axis direction. Within the chains, there are a number of offset π-π inter...
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In the title compound, C(10)H(9)IO, the asymmetric unit contains two mol-ecules, in which the iodo-bearing six-membered rings adopt envelope conformations [displacements of the flap atoms = 0.419 (3) and 0.431 (3) Å]. In both mol-ecules, the I atoms are disordered over two set of sites in 0.54 (4):0.46 (4) and 0.71 (3):0.29 (3) ratios. In the crystal, the packing features a weak C-H⋯π inter-act...
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ژورنال
عنوان ژورنال: Acta Crystallographica Section E Structure Reports Online
سال: 2011
ISSN: 1600-5368
DOI: 10.1107/s1600536811034349