Total Synthesis of 3′,3′′′-Binaringenin and Related Biflavonoids
作者:Gustavo Seoane、Gabriel Sagrera
DOI:10.1055/s-0030-1258140
日期:2010.8
The synthesis of natural 3′,3′′′-binaringenin and four related biflavonoids was performed in good overall yield (15-35%) starting from readily available phloroglucinol and 4-hydroxy- or 4-methoxybenzaldehyde. Preliminary results indicate that some of these compounds have an interesting activity against S. aureus. binaringenin - biapigenin - protecting groups - antibacterial activity
Hydrogenation of substituted aromatic aldehydes: nucleophilic trapping of the reaction intermediate, application to the efficient synthesis of methylene linked flavanol dimers
作者:François-Didier Boyer、Paul-Henri Ducrot
DOI:10.1016/j.tetlet.2005.05.132
日期:2005.8
The synthesis of dimeric flavanols is the consequence of the possible trapping of the reaction intermediates generated in the course of the reductive hydrogenation of substituted benzaldehydes. The scope of this reaction is investigated.
tridactyla), is a promising orally effective atrium-selective antiarrhythmic agent for the treatment of atrial fibrillation (AF). Here we describe an efficient two-component method for the synthesis of acacetin and its derivatives.
BIS(AMINOPHENOL) DERIVATIVE, PROCESS FOR PRODUCING SAME, POLYAMIDE RESIN, POSITIVE PHOTOSENSITIVE RESIN COMPOSITION, PROTECTIVE FILM, INTERLAYER DIELECTRIC FILM, SEMICONDUCTOR DEVICE, AND DISPLAY ELEMENT
申请人:Terakawa Koji
公开号:US20100044888A1
公开(公告)日:2010-02-25
A bis(aminophenol) derivative having substituents at positions adjacent to two amino groups is provided. The bis(aminophenol) derivative is used as a raw material of a polyamide resin for a positive-tone photosensitive resin composition. A polyamide resin comprising bis(aminophenol) and a structure derived from a carboxylic acid is also provided, the bis(aminophenol) having substituents at positions adjacent to the two amino groups. A positive-tone photosensitive resin composition comprising a polybenzooxazole precursor resin, exhibiting high sensitivity and a high cyclization rate even when cured at a low temperature is provided. Also provided is a positive-tone photosensitive resin composition comprising a polyamide resin having an imide structure, an imide precursor structure, or an amide acid ester structure. The composition exhibits high sensitivity and produces a cured product having low water absorption even when cured at a low temperature.
An agent for hair deforming treatment comprising the following components (A), (B) and (C) :
(A) glyoxylic acid, or a hydrate or a salt thereof,
(B) resorcin, and
(C) water,
wherein the molar ratio of the content of the component (B) to the content of the component (A), (B)/(A), is 0.2 or more and 5 or less.