نتایج جستجو برای: benzofuran chalcones

تعداد نتایج: 2418  

2009
Hong Dae Choi Pil Ja Seo Byeng Wha Son Uk Lee

In the title compound, C(21)H(15)ClO(2)S, the O atom and the phenyl group of the phenyl-sulfinyl substituent lie on opposite sides of the plane of the benzofuran fragment; the phenyl ring is almost perpendicular to this plane [82.24 (7)°]. The phenyl ring in the 2-position is rotated out of the benzofuran plane, making a dihedral angle of 11.50 (9)°. The crystal structure is stabilized by inter...

2011
Pil Ja Seo Hong Dae Choi Byeng Wha Son Uk Lee

In the title compound, C(20)H(12)BrFO(2)S, the 4-fluoro-phenyl ring makes a dihedral angle of 2.63 (6)° with the mean plane of the benzofuran fragment. The dihedral angle between the phenyl ring and the mean plane of the benzofuran fragment is 84.60 (6)°. In the crystal, mol-ecules are linked by weak inter-molecular C-H⋯O hydrogen bonds, and slipped π-π inter-actions between the benzene rings o...

Journal: :Journal of the Brazilian Chemical Society 2015

2014
Rammohan Pal Taradas Sarkar Tapas Sarkar

Various indolyl chalcones have been synthesized in unsealed vessels in a domestic microwave oven. Considerable increase in the reaction rate has been observed with better yields.

2009
Hong Dae Choi Pil Ja Seo Byeng Wha Son Uk Lee

The title compound, C(12)H(11)FO(3)S, was prepared by alkaline hydrolysis of ethyl 2-(3-ethyl-sulfan-yl-5-fluoro-1-benzofuran-2--yl) acetate. In the crystal structure, the carboxyl groups are involved in inter-molecular O-H⋯O hydrogen bonds, which link the mol-ecules into centrosymmetric dimers. These dimers are further packed into stacks along the b axis by aromatic π-π inter-actions between t...

Journal: :European journal of medicinal chemistry 2005
Imthyaz A Khan Manohar V Kulkarni Chung-Ming Sun

A one pot synthesis of an array of angularly linked tri-heterocycles with coumarin, benzofuran and furan rings is described. This high yielding synthesis is achieved by the reaction of various 4-bromomethylcoumarins with furyl o-hydroxyphenyl ketones involving benzylic nucleophilic displacement and intramolecular aldolization. All the compounds have been tested in vitro for their anti-microbial...

2009
Hong Dae Choi Pil Ja Seo Byeng Wha Son Uk Lee

In the title compound, C(15)H(17)BrO(4)S, the methyl-sulfinyl O atom and the methyl substituents lie on opposite sides of the plane through the benzofuran fragment. The crystal structure is stabilized by π-π inter-actions between the benzene rings of neighbouring mol-ecules [centroid-centroid distance = 3.698 (4) Å], and by C-H⋯π inter-actions between a methyl-ene H atom of the butyl group and ...

2008
Hong Dae Choi Pil Ja Seo Byeng Wha Son Uk Lee

In the title compound, C(18)H(18)O(2)S, the O atom and the phenyl group of the phenyl-sulfinyl substituent lie on opposite sides of the planar benzofuran fragment. The phenyl ring is nearly perpendicular to the benzofuran system [88.56 (7)°] and is tilted slightly towards it. Molecules form pseudo-helices along the a axis. The crystal structure is stabilized by a C-H⋯π inter-action between a me...

2008
Hong Dae Choi Pil Ja Seo Byeng Wha Son Uk Lee

The title compound, C(18)H(18)O(3)S, was prepared by the oxidation of 5-isopropyl-2-methyl-3-phenyl-sulfanyl-1-benzofuran with 3-chloro-peroxy-benzoic acid. The phenyl ring makes a dihedral angle of 79.37 (6)° with the plane of the benzofuran fragment. The crystal structure is stabilized by aromatic π-π stacking inter-actions between the benzene and furan rings of neighbouring mol-ecules [centr...

Journal: :Chemical communications 2004
Jiaxi Xu Linge Ma Peng Jiao

Highly enantioselective aziridination of chalcones catalyzed by a novel backbone 1,8-bisoxazolidinylanthracene (AnBOX) and CuOTf with up to >99% ee and the opposite enantioselectivity compared with the ligands of Evans are described.

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