Rh(DHTANa) is a new water-soluble catalyst easily obtained by mixing in water the catalytic precursor [Rh(COD)Cl]2 and the dihydrothioctic acid sodium salt (DHTANa). This catalyst showed to be very active in the hydrogenation of unsaturated substrates as 2-cyclohexen-1-one, the biomass-derived furfural and acetophenone. In this last case the catalytic system obtained by using as water-soluble ligand (R)-(DHTANa)
The invention relates to compounds of the general formula (I)
to a method for the production thereof, to pharmaceutical, cosmetic compositions or dosage forms which contain these compounds, and to a method for contraception by administration of these compounds.
An Efficient, Economical Synthesis of the Novel Anti-tumor Agent CPI-613
作者:Frank S. Gibson、Deepak Gupta、Robert Shorr、Robert Rodriguez
DOI:10.1021/op200091t
日期:2011.7.15
An efficient and practical synthesis of the novel anti-tumor compound 6,8-dithiobenzyl octanoic acid, CPI-613 (2), was developed and executed on a practical scale. CPI-613 can be made in a single vessel from (±)-lipoic acid (1) via reductive opening of the disulfide ring followed by benzylation of the sulfhydryls with benzyl bromide. CPI-613 was isolated by simple crystallization in high yield and
A melanin eliminator preparation comprising a metal chelate compound represented by the following formula (I),
wherein M denotes a metal, and R denotes hydroxyl, O-lower alkyl, an amine bonded at N, an amino acid bonded at N, or a peptide bonded at N, or a pharmacologically acceptable salt thereof.