The title compound, C(15)H(16)ClNO(3)S, was obtained by the organocatalytic asymmetric Michael addition of thian-4-one to 1-chloro-4-[(1E,3E)-4-nitro-buta-1,3-dien-yl]benzene. The double bond has an E configuration and the thian-4-one six-membered ring adopts a chair conformation. The crystal structure is stabilized by weak inter-molecular C-H⋯O hydrogen bonds.

A method, quantitative analysis of multicomponents by single marker (QAMS), was established in this article to investigate the quality control of a traditional Chinese medicine, Oviductus Ranae. 7-Hydroxycholesterol, 7-ketocholesterol, 4-cholesten-3-one, stigmasterol, 7-dehydrocholesterol, and cholesterol were selected as the indexes of quality evaluation of Oviductus Rana. The determination wa...

polygonatum orientale desf. (asparagaceae) is herbaceous and perennial plant grown in northern parts of iran. the rhizomes of polygonatum, known as iranian shaghagho, is used in iranian traditional medicine as tonic, aphrodisiac, wound healing, lightening, kidney stone remedy, gynecological and internal wounds healing, anti-gout and rheumatism, and anti-diabetic. the aim of this study was to ev...

The title enamino ketone, C(12)H(15)NO, a derivative of 4-(phenyl-amino)-pent-3-en-2-one, presents a roughly planar [greatest displacement of an atom from the pentenone plane is 0.033 (2) Å] pentenone backbone, enhanced by an intra-molecular N-H⋯O hydrogen bond; the asymmetry in C-C distances in the group suggests the presence of unsaturated bonds. The overall geometry in the free ligand differ...

In the title compound, C22H26O2, the aromatic rings are inclined to one another by 8.39 (9)° and the mol-ecule has an E conformation about the C=C bond. In the crystal, mol-ecules stack head-to-tail along the b-axis direction. They are linked by very weak C-H⋯O contacts, forming C(4) chains along [100]. Two chains are linked by a pair of very weak C-H⋯O contacts, enclosing inversion-dimeric R 2...

Irradiation of &methyl spiro [2.5] oct-7-en-4-one through its singlet excited state resulted in the formation of 4-methyl spirO [2.5] oct-4-en -6-one. We have used the cyclopropyl moiety in the molecule as a probe to study the operating mechanism in the photochemistry of ?, ?-unsaturated compounds. The results showed that this photoisomerization probably occurs through a concerted process.