Abstract: A process for the preparation of a compound of formula (I): which is useful as an intermediate in the preparation of pharmaceutically active compounds.

Abstract: The present invention discloses a process for dimethylation of active methylene groups. Specifically, the invention discloses a process for preparing 3-amino-2,2-dimethylpropanamide. Compounds produced by the present dimethylation process such as 3-amino-2,2-dimethylpropanamide can be used as intermediates in the route of synthesis of therapeutic, prophylactic or diagnostic agent, for example aliskiren or cryptophycin. Particularly, the invention relates to embodiments further extending to processes for preparing pharmaceutical dosage form comprising said therapeutic, prophylactic or diagnostic agents. More specifically, the invention relates to the use of compounds produced by the present dimethylation process for the manufacture of therapeutic, prophylactic or diagnostic agents or for the manufacture of pharmaceutical dosage forms comprising said therapeutic, prophylactic or diagnostic agents.

Abstract: A process for the preparation of a compound of formula (I): which is useful as an intermediate in the preparation of pharmaceutically active compounds.

Abstract: This invention relates to processes and intermediates for the stereoselective alkylation of carbonyl groups. The invention in particular allows the stereoselective preparation of the antidepressant drug escitalopram. It has been found that boric or boronic acid derivatives are useful bridging elements for the attachment of a chiral group to a compound containing a carbonyl group to be alkylated. The said borates and boronates are thus useful in a process for the asymmetric alkylation of a carbonyl group in a compound containing a carbonyl group and an anchor group capable of reacting with a boric or boronic acid derivative. The asymmetric alkylation can be carried out by admixing the compound containing a carbonyl group to be alkylated and the anchor group capable of reacting with a boric or boronic acid derivative with a boric or boronic acid derivative, adding a chiral alcohol, and adding an organometallic compound. After the alkylation reaction, the borate and boronate can be easily removed by hydrolysis.

Abstract: Efficient synthetic routes for the preparation of rhinovirus protease inhibitors of formula I, as well as key intermediates useful in those synthetic routes. These compounds of formula I, as well as pharmaceutical compositions that contain these compounds, are suitable for treating patients or hosts infected with one or more picornaviruses.

Abstract: A reaction of a para-substituted aryl composition with cyclohexanone is facilitated by a metal hydride, such as NaH, KH, LiH, MgH2, CaH2, AlH3, and/or LiAlH4 to make first intermediates useful in producing a drug commonly known as Venlafaxine. Alternatively, lithium diisopropylamide (diisopropylamino lithium) may be used in place of the metal hydride. The first intermediates may be further reacted to form second intermediates in a reduction that is facilitated by Rainey nickel or a metal hydride. These reaction processes may each occur in an organic solvent, which delivers highly pure reaction products in high yield.

Abstract: The invention relates to a process for the preparation of aralkylated aromatic compound with both small and large size aralkylating agents; wherein the catalyst used is heterogeneous solid catalyst removable from the reaction products by simple filtration, thus allowing the separated catalyst to be reused in the process. The catalyst is selected from micro or mesoporous gallosilicates and galloaluminosilicates, having structure similar to that of zeolites known in the prior art.

Abstract: A process is described for the preparation of (+)-2-(3,4-dichlorophenyl)-4-hydroxybutylamine (I) by reaction of 3,4-dichlorophenylacetonitrile (II) with an alkali metal halogenoacetate, treatment of the 3-cyano-3-(3,4-dichlorophenyl)propionic acid (III) with D-(-)-N-methylglucamine, with second-order asymmetric conversion, hydrolysis of the D-(-)-N-methylglucamine salt of (-)-3-cyano-3-(3,4-dichlorophenyl)propionic acid and enantioconservative reduction of the resulting levorotatory cyanoacid with a borane.

Abstract: A method and apparatus for conducting chemical reactions in polyphase systems by using emulsifying means for the liquid components consisting of ultrasound emitters or turbines, in the absence or presence of a solid catalyst in fixed bed form with which the emulsified liquid components are brought into immediate contact by continuous circulation.

Abstract: Novel 3-halo-2,2-disubstituted propanenitriles of formula ##STR1## wherein Z represents bromo or chloro and A, together with the carbon atom to which it is attached, represents a 5,6 or 7 membered saturated carbocyclic or heterocyclic ring, are useful as intermediates for preparing substituted pyrimido[1,2-a]indoles. The intermediates can be prepared by a novel process which comprises condensing a 2,2-disubstituted ethanenitrile with a dihalomethane in the presence of a non-nucleophilic strong base.