Bicyclo[1.1.1]pentane (BCP) replacement as a bioisostere in drug molecules has an influence on their permeability, aqueous solubility and in vitro metabolic stability. Thus, the chemical installation of the BCP unit into a chemical entity remains a significant challenge from a synthetic point of view. Here, we have presented a new approach for the installation of the BCP unit on the xanthate moiety
One-pot synthesis of symmetric 1,7-dicarbonyl compounds via a tandem radical addition–elimination–addition reaction
作者:Zhongyan Huang、Jiaxi Xu
DOI:10.1039/c3ra42932f
日期:——
A novel approach to synthesize symmetric 1,7-dicarbonyl compounds via a tandem radical additionâeliminationâaddition reaction of S-carbonylmethyl xanthates with allylmethylsulfone and its analogues has been developed. Radicals were produced from S-carbonylmethyl xanthates by adding dilauroyl peroxide and reacted with allylmethylsulfone or analogues to generate terminal olefins as intermediates. The excessive radicals reacted with the intermediate olefins immediately to give adducts of symmetric 1,7-dicarbonyl compounds. This is an efficient method to synthesize 1,7-dicarbonyl compounds under mild conditions.
PRODRUGS OF METHYL HYDROGEN FUMARATE, PHARMACEUTICAL COMPOSITIONS THEREOF, AND METHODS OF USE
申请人:Gangakhedkar Archana
公开号:US20100048651A1
公开(公告)日:2010-02-25
Prodrugs of methyl hydrogen fumarate, pharmaceutical compositions comprising prodrugs of methyl hydrogen fumarate, and methods of using prodrugs of methyl hydrogen fumarate and pharmaceutical compositions thereof for treating diseases such as psoriasis, asthma, multiple sclerosis, inflammatory bowel disease, and arthritis are disclosed.
Total Synthesis of (+)-Rishirilide B: Development and Application of General Processes for Enantioselective Oxidative Dearomatization of Resorcinol Derivatives
作者:Lupe H. Mejorado、Thomas R. R. Pettus
DOI:10.1021/ja062987w
日期:2006.12.1
amide of dimethylhydrazine for opening and cleavage of a [1,4]-dioxan-2-one is also described. This procedure unmasks the hydroxy dione 36 by jettisoning the chiral directing group. Regioselective O-carbamylation of the 1,3-dione 36 enables the transformation of the remaining carbonyl into the alpha-hydroxy carboxylicacid found in 2. The total synthesis of (+)-rishirilide B (2) requires 15 pots from
METHODS OF USING PRODRUGS OF METHYL HYDROGEN FUMARATE AND PHARMACEUTICAL COMPOSITIONS THEREOF
申请人:Gangakhedkar Archana
公开号:US20120095003A1
公开(公告)日:2012-04-19
Prodrugs of methyl hydrogen fumarate, pharmaceutical compositions comprising prodrugs of methyl hydrogen fumarate, and methods of using prodrugs of methyl hydrogen fumarate and pharmaceutical compositions thereof for treating diseases such as psoriasis, asthma, multiple sclerosis, inflammatory bowel disease, and arthritis are disclosed.