Synthesis of phthalic acid derivatives <i>via</i> Pd-catalyzed alkoxycarbonylation of aromatic C–H bonds with alkyl chloroformates
作者:Gang Liao、Hao-Ming Chen、Bing-Feng Shi
DOI:10.1039/c8cc06663a
日期:——
A Pd(II)-catalyzed alkoxycarbonylation of aromatic C–H bonds with alkylchloroformates has been developed. A broad range of benzamides and alkylchloroformates are compatible with this protocol. The reaction is operationally simple and scalable. The direct group could be readily removed to access substituted phthalic acid esters (PAEs), 1,2-dibenzyl alcohols and phthalamides. Besides alkoxycarbonylation
Assessment of the regioselectivity in the condensation reaction of unsymmetrical o -phthaldialdehydes with alanine
作者:Agathe C.A. D'Hollander、Nicholas J. Westwood
DOI:10.1016/j.tet.2017.11.035
日期:2018.1
context of the use of o-phthaldialdehydes that contain additional substituents in the aromatic ring leading to a detailed analysis of the regioselectivity of the reaction. Eleven monosubstituted o-phthaldialdehydes were synthesised and reacted with alanine. The regioselectivity observed across the eleven substrates led to the design of a disubstituted substrate that reacted with very high control. A gram-scale
CS-758 was selected as a candidate for clinical trials, but since its water-solubility was insufficient for an injectable formulation, phosphoryl ester prodrugs were designed. In this study, the synthesis and evaluation of these injectable prodrugs are described. Phosphoryl ester 17h was soluble in water, and was stable in both water and in a solid state. 17h was converted to CS-758 in human liver microsome and was also converted to CS-758 in rats after intravenous (i.v.) administration with good conversion speed and efficiency. 17h (i.v.) reduced the viable cell counts in kidneys in a murine hematogenous Candida albicans infection model and in lungs in a murine pulmonary Aspergillus fumigatus infection model, wherein the effects were comparable to or slightly superior to that of CS-758 (per os).
Dehydrogenative Lactonization of Diols in Aqueous Media Catalyzed by a Water-Soluble Iridium Complex Bearing a Functional Bipyridine Ligand
作者:Ken-ichi Fujita、Wataru Ito、Ryohei Yamaguchi
DOI:10.1002/cctc.201300717
日期:2014.1
A new catalytic system for the dehydrogenativelactonization of a variety of benzylic and aliphatic diols in aqueousmedia was developed. By using a water‐soluble, dicationic iridium catalyst bearing 6,6′‐dihydroxy‐2,2′‐bipyridine as a functionalligand, highly atom economical and environmentally benign synthesis of various lactones was achieved in good to excellent yields. Recovery and reuse of the
A triazole compound of the formula (I) or a pharmacologically salt thereof:
1
wherein X represents a group of formula X—OH which has antifungal activity, L represents an -(adjacently substituted C
6
-C
10
aryl)-CH
2
group and R represents a —P(═O)(OH)
2
group.