such as 7α-acetylthio-17-hydroxy-3-oxo-17α-pregn-4-ene-21-carboxylic acid γ-lactone (spironolactone) which is an antialdosteronic diuretic effective in therapy is prepared by contacting a steroidal material which contains a 7β-acylthio-4-en-3-oxosteroid with a thiocarboxylic acid.Hiromi...
The carbon black dispersed polyamide acid solution composition, reacting with the biphenyl tetra- carboxylic acid two anhydride and aromatic diamine production method of the semi-The present invention provides a carbon black-dispersed polyamic ... 西浦 直樹,市野 晃,鞍岡 隆志,... 被引量: 0发表:...
Preparing aromatic carboxylic acid derivatives by aromatic nucleophilic substitution, comprises reacting aromatic carboxylic acid derivatives with metal co... Preparing aromatic carboxylic acid derivatives by aromatic nucleophilic substitution, comprises: reacting aromatic carboxylic acid derivatives or its salts.....
N-BOCprotectChemicalbooked95%;tert-Butyl4-bromo-1H-indole-1-carboxylate,4-Bromo-1-(tert-butoxycarbonyl)-1H-indole;4-BROMOINDOLE-1-CARBOXYLICACIDTERT-BUTYLESTER;4-BROMOINDOLE,N-BOCPROTECTED
Severely sterically hindered secondary aminoether alcohols are prepared by reacting an organic carboxylic acid or alkali metal salt of an organic carboxylic acid with a sulfonyl halide, a sulfuryl halide, a mixed sulfuryl ester halide or a mixed sulfuryl amide halide to yield a sulfonic-carboxylic ...
Synthesis of Cefdinir from 7-Amino-3-vinyl Cephem-4-carboxylic Acid Using N-Methyl Morpholine as Base In this paper, synthesis of cefdinir (I) from 7-amino-3-vinyl cephem-4-carboxylic acid (V) is reported by reacting with 2-mercapto benzothiazolyl (Z)-2-(2-... D Muralikrishna,A ...
Prepn. of 2-oxazoles of formula (I) comprises reacting a carboxylic acid deriv. of formula (II) with an aminoacetal of formula (III) and then cyclising the obtd. amidoacetal condensation prod. of formula (IV) in polyphosphoric acid. R1 = aryl or 1-21C (cyclo)alk(en)yl; R2, R3,...
Enzyme sourceTime(h)Carboxylic acid yield(%)Carboxylic acid ee(%) Rhizopus japonicus48179 Pseudomonas fluorescens1.77073 The stereoselective synthesis of (E)-3-fluoro-2-alkenoic acids, for example172, in good yields (65–70%) has been undertaken by reactingGrignard reagentswith lithium 3,3,3-tri...
A method of making low molecular weight polyethylene glycol carboxylic acids comprises reacting lower molecular weight polyethylene glycols with monohalogen-substituted aliphatic acid esters in base, and then saponifying the resulting intermediates. The polyethylene glycol carboxylic acids are then extracted ...
Catalysts for the production of carboxylic acid salts from alcohols, which consist of or contain Copper b) 99.9 to 10% by weight of copper and 0.01 to 90% by weight of Iron and 0 to 50% by weight of one or several other metals, possibly hydroxides are endowed with the By precipitation...