1-(2,6-Dihydroxy-4-methoxyphenyl)-3-phenylpropan-1-one

(E)-3-(2,3-Dimethoxyphenyl)-1-(2-hydroxy-4-methoxyphenyl)prop-2-en-1-one

The mol-ecular conformation of the title compound, C(18)H(18)O(5), is stabilized by a strong intra-molecular hydrogen bond between the hydroxyl and carbonyl groups. The C=C double bond displays an E configuration while the carbonyl group shows an S-cis configuration relative to the double bond. The dihedral angle between the two rings is 15.0 (1)°.

Foreword Introduction 4 , 5 - Dihydroxy - 1 , 3 - Bis ( Hydroxymethyl ) Imidazolidin - 2 - One Cas N ° : 1854 - 26 - 8

3-(4-Bromo­anilino)-3-(4-chloro­phen­yl)-1-phenyl­propan-1-one

The asymmetric C atom in the title compound, C(21)H(17)BrClNO, is in a slightly distorted tetra-hedral environment and the NH unit adopts a gauche orientation with respect to the CO group. In the crystal, pairs of inter-molecular N-H⋯O hydrogen bonds form centrosymmetric dimers.

6 - ( 1 , 3 - Dihydroxy - 3 - phenylpropylidene ) - 5 - hydroxy - 2 , 2 , 4 - trimethylcyclohex - 4 - ene - 1 , 3 - dione

A novel compound involved in the aroma of the fruit Campomanesia lineatifolia was isolated; the structure was determined by spectroscopic methods, mainly 1D and 2D NMR.

Ethyl 1’-[1-(4-methoxyphenyl)-3-phenoxy-4-phenylazetidin-1-yl]-1,3-dioxo-2′,3′,5′,6′,7′,7a′-hexahydroindan-2-spiro-3′-1′H-pyrrolizine-2′-carboxylate

In the title compound, C(34)H(32)N(2)O(7), the methyl group and methylene H atoms of the ethoxycarbonyl substituent are disordered over two positions with site occupancy factors for the major and minor conformers of 0.594 (8) and 0.406 (8), respectively. The unsubstituted ring of the pyrrolizine ring system exhibits a twist conformation, the other an envelope conformation. In the crystal struct...