Crystal Structure of 1,7,7-Trimethyl-4-(4-methylphenyl)-1,2,3,4,5,6,7,8-octahydroquinazoline-2,5-dione.

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Crystal structure of 1,7,7-trimethyl-4-(4-methylphenyl)-1,2,3,4,5,6,7,8- octahydroquinazoline-2,5-dione.

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Crystal structure of 4-(4-bromophenyl)-1,7,7-trimethyl-1,2,3,4,5,6,7,8- octahydroquinazoline-2,5-dione.

hydroquinazoline-2,5-dione was obtained from Biginelli-type cyclocondensation1 of 5,5-dimethylcyclohexane-1,3-dione with urea and 4-bromobenzaldehyde: yield 1.16 g (62.19%), m.p. 174 – 175 ̊C. A summary of the key crystallographic information is given in Table 1. The atomic coordinates and equivalent isotropic displacement parameters with estimated standard deviations for atoms except H are list...

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Crystal structure of 3-(4-bromo­phenyl­sulfon­yl)-2,5,6-trimethyl-1-benzo­furan

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In the title compound, C20H14BrN3O3, the benzene ring makes dihedral angles of 71.30 (11) and 68.95 (14)° with the naphthalene ring system and the triazole ring, respectively. The latter two ring systems are coplanar, with a dihedral angle of 2.92 (12)°. The O atoms deviate from the naphthalene ring system by 0.029 (2) and -0.051 (2) Å. In the crystal, mol-ecules are linked by C-H⋯O and C-H⋯N h...

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Synthesis and crystal structure of Schiff-base compound (E)-4-methoxy-N- (4-hydroxybenzylidene) aniline

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ژورنال

عنوان ژورنال: Analytical Sciences

سال: 2001

ISSN: 0910-6340,1348-2246

DOI: 10.2116/analsci.17.681