摘要:
Polymorphic forms of the angiotensin II receptor antagonist, 3-�2'-(N-benzoyl)sulfonamidobiphenyl-4-yl!methyl-5,7-dimethyl-2-ethyl-3H-imidazo�4,5-b!pyridine and a method for the preparation of these crystal forms.
摘要:
This invention relates to a method for the preparation of a compound of formula I: ##STR1## a key intermediate in the synthesis of a series of Angiotensin II receptor antagonists. The invention also relates to a selective reagent for conducting the Hofmann rearrangement, particularly in the formation of a pyridinoimidazolone, which is a percursor to the formation of an imidazopyfidine of formula I. This invention also relates to a method for the preparation of imidazolutidine, a key intermediate in the synthesis of 3-(2'-(N-benzoyl)sulfonamidobiphen-4-yl)-methyl-5,7 -dimethyl-2-ethyl-3H-imidazo[4,5-b]pyridine, using pyridinoimidazolone, an unreactive urea.
摘要:
A process is disclosed that bioconverts indene to (1S)-amino-(2R)-indanol substantially free of any of its stereoisomers, by the action of a strain of P. putida or Rhodococcus sp., followed by various chemical step(s), e.g., chiral specific crystallization, treatment with strong acid in the presence of acetonitrile.
摘要:
The natural stereochemistry at the 13-position of avermectin aglycones, normally .alpha.-oriented or below the plane of the molecule, is inverted or epimerized into the .beta.-position. The procedure starts with the avermectin aglycone compounds where the 13.alpha.-hydroxy group is activated to a mesylate leaving group. The resultant 13-.alpha.-mesylate is then displaced with a cesium carboxylate and one equivalent of the respective carboxylic acid, ending with the ester group being converted to the 13-.beta.-hydroxy configuration by transesterification in high yield.
摘要:
Compositions containing β2 adrenergic agonists in combination with carbonates and carbamates of the formula. and in combination with related steroid carbonates and carbamates are disclosed. The compositions are useful for treating bronchospasm, for inducing bronchodilation and for treating rhinitis, asthma, and chronic obstructive pulmonary disease (COPD) and inflammatory diseases, particularly by inhalation.
摘要:
Disclosed is a process for preparing a macrocyclic compound of the formula (I) wherein a hydroxyl-substituted macrocyclic compound of formula (3) is reacted with a sulfonyl-substituted compound of formula QUIN: The compounds of formula (I) are potent active agents for the treatment of hepatitis C virus (HCV) infection.
摘要:
A method of preparation of a highly pure salt of R,R-formoterol L-tartrate is disclosed. The process provides the most thermodynamically stable polymorph by recrystallization of a novel polymorph.
摘要:
A method of preparation of a highly pure salt of R,R-formoterol L-tartrate is disclosed. The process provides the most thermodynamically stable polymorph by recrystallization of a novel polymorph.