Structure-activity relationship of antiestrogens. A study using triarylbutenone, benzofuran, and triarylfuran analogs as models for triarylethylenes and triarylpropenones
摘要:
In a study of the structure-activity relationship (SAR) of antiestrogens use has been made of certain 1,2,3-triarylbutenones, of 2-arylbenzofurans carrying aryl or aroyl substituents at C3, and of 2,3,4-triarylfurans as conformationally constrained models for triarylethylene (TAE) and triarylpropenone (TAP) prototypes. The position-specific contributions of substituents to receptor affinity and to agonist-antagonist profiles were used as aids in characterizing the relative binding orientation of the prototypes. Although most compounds were found to be weak receptor ligands and poorly active in vivo, the following conclusions could be drawn about their SAR: (i) (Z)-TAPs and TAEs interact with the receptor in an analogous manner using the trans-stilbene core, with their agonist-antagonist profiles depending on the nature of other substructures. (ii) Incorporation into the benzofuran framework introduces a stereoelectronic constraint that compromises the normal binding interactions of TAE, as well as TAP, prototypes, resulting in their poor affinities and weak biological activities. (iii) (E)-TAPs can interact with the receptor through their S-cis conformation, but such a binding mode is unlikely to account for their behavior as antagonists.
Structure-activity relationship of antiestrogens. A study using triarylbutenone, benzofuran, and triarylfuran analogs as models for triarylethylenes and triarylpropenones
摘要:
In a study of the structure-activity relationship (SAR) of antiestrogens use has been made of certain 1,2,3-triarylbutenones, of 2-arylbenzofurans carrying aryl or aroyl substituents at C3, and of 2,3,4-triarylfurans as conformationally constrained models for triarylethylene (TAE) and triarylpropenone (TAP) prototypes. The position-specific contributions of substituents to receptor affinity and to agonist-antagonist profiles were used as aids in characterizing the relative binding orientation of the prototypes. Although most compounds were found to be weak receptor ligands and poorly active in vivo, the following conclusions could be drawn about their SAR: (i) (Z)-TAPs and TAEs interact with the receptor in an analogous manner using the trans-stilbene core, with their agonist-antagonist profiles depending on the nature of other substructures. (ii) Incorporation into the benzofuran framework introduces a stereoelectronic constraint that compromises the normal binding interactions of TAE, as well as TAP, prototypes, resulting in their poor affinities and weak biological activities. (iii) (E)-TAPs can interact with the receptor through their S-cis conformation, but such a binding mode is unlikely to account for their behavior as antagonists.
Gallium Phthalocyanine Crystal, Production Process Thereof, Photoreceptor, Process Cartridge and Image Forming Apparatus
申请人:HONGO Kazuya
公开号:US20120322998A1
公开(公告)日:2012-12-20
A gallium phthalocyanine crystal has a peak of spectral absorption spectrum within a wavelength range of from about 760 nm to about 773 nm or within a wavelength range of from about 790 nm to about 809 nm.
Photoconductive organic pigment, photoconductive organic pigment dispersion liquid, electrophotographic photoreceptor and electrophotographic device using the same
申请人:Fuji Xerox Co., Ltd.
公开号:US20040063013A1
公开(公告)日:2004-04-01
The present invention relates to a photoconductive organic pigment comprising granular cores and an organic pigment having photoconductive properties which organic pigment adheres to the surfaces of the granular cores, a photoconductive organic pigment dispersion liquid comprising the photoconductive organic pigment, and an electrophotographic photoreceptor comprising an electroconductive substrate laminated with a photosensitive layer containing the photoconductive organic pigment and an electrophotographic device using the electrophotographic photoreceptor.
Hydroxygallium phthalocyanine pigment and process for the production thereof, process for the production of photosensitive layer-forming coating solution, electrophotographic photoreceptor, process cartridge, electrophotographic device and image formation method
申请人:Hongo Kazuya
公开号:US20050100806A1
公开(公告)日:2005-05-12
A hydroxygallium phthalocyanine pigment is characterized by having a maximum peak wavelength within a range of from 810 nm to 839 nm in optical absorption spectrum in a wavelength range of from 600 nm to 900 nm.
872. Polymerisation of flavans. Part II. The condensation of 4′-methoxyflavan with phenols
作者:B. R. Brown、W. Cummings
DOI:10.1039/jr9580004302
日期:——
Hishmat, O. H.; Rahman, A. H. Abd el; El-Ebrashi, N. M. A., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1983, vol. 22, # 3, p. 313 - 315
作者:Hishmat, O. H.、Rahman, A. H. Abd el、El-Ebrashi, N. M. A.、El-Diwani, H. I.、El-Diwani, A. I.