worldwide are researching to develop non-ER binding starting compounds to fulfill unmet market needs. In line with this trending research topic, the current paper highlights the development of tetrazole derivatives bearing a bisphenol structure (TbB) as a novel weak binder or potential inactive to the estrogen receptor (ER) and androgen receptor (AR). The structure and ligand-based approach supported by binding
4-aminophenol derivatives and processes for preparing the same
申请人:Tanabe Seiyaku Co., Ltd.
公开号:US05047555A1
公开(公告)日:1991-09-10
There are disclosed a 4-aminophenol derivative of the formula: ##STR1## (wherein R.sup.1 and R.sup.2 each represent a lower alkyl group, Y represents a single bonding arm, a lower alkylene group or a lower alkenylene group, R.sup.3 represents a thienyl group or pyrrolyl group which may be also substituted with a lower alkyl group; benzothienyl group, indolyl group; or a phenol group which is substituted with 1 to 2 groups selected from a lower alkoxy group and a lower alkanoyloxy group; or Y-R.sup.3 represents integrally an alkyl group with 6 to 9 carbon atoms; or a hydrocarbon group with 5 to 14 carbon atoms having 2 or 3 double bonds) or a pharmacologically acceptable salt thereof, and processes for preparing the same.
4-Aminophenol derivatives and processes for preparing the same
申请人:TANABE SEIYAKU CO., LTD.
公开号:EP0374048A1
公开(公告)日:1990-06-20
There are disclosed a 4-aminophenol derivative of the formula:
(wherein R¹ and R² each represent a lower alkyl group, Y represents a single bonding arm, a lower alkylene group or a lower alkenylene group, R³ represents a thienyl group or pyrrolyl group which may be also substituted with a lower alkyl group; benzothienyl group, indolyl group; or a phenyl group which is substituted with 1 to 2 groups selected from a lower alkoxy group and a lower alkanoyloxy group; or Y-R³ represents integrally an alkyl group with 6 to 9 carbon atoms; or a hydrocarbon group with 5 to 14 carbon atoms having 2 or 3 double bonds) or a pharmacologically acceptable salt thereof, and processes for preparing the same.
Polymer-Supported Organocatalysts: Asymmetric Reduction of Imines with Trichlorosilane Catalyzed by an Amino Acid-Derived Formamide Anchored to a Polymer
作者:Andrei V. Malkov、Marek Figlus、Pavel Kočovský
DOI:10.1021/jo800094q
日期:2008.6.1
Asymmetricreduction of ketimines 1a−e with trichlorosilane can be catalyzed by the N-methylvaline-derived Lewis basic formamideanchored to a polymeric support (5a and 5b) with good enantioselectivity (≤82% ee) and low catalyst loading (typically 15 mol %) at room temperature. This protocol represents a considerable simplification of the isolation procedure and is particularly suitable for a parallel