Cis and trans ruthenium complexes that can be used as catalysts for ring opening metathesis polymerization (ROMP) are described. The complexes are generally square pyramidal in nature, having two anionic ligands X. Corresponding cationic complexes where one or both of the anionic ligands X are replaced by a non-co-ordinating anionic ligand are also described. Polymers such as polydicyclopentadiene (PDCPD) can be prepared using the catalysts.

Cis and trans ruthenium complexes that can be used as catalysts for ring opening metathesis polymerization (ROMP) are described. The complexes are generally square pyramidal in nature, having two anionic ligands X. Corresponding cationic complexes where one or both of the anionic ligands X are replaced by a non-co-ordinating anionic ligand are also described. Polymers such as polydicyclopentadiene (PDCPD) can be prepared using the catalysts.

Disclosed is a chemical process of preparing dehydrohedione from Hedione via α-chlorination and elimination steps. The process can be conducted in a one-pot process or in a continuous reactor system. Accordingly, a simple and cost effective process of preparing cis-Hedione enriched products is developed through reduction of dehydrohedione in the presence of a chiral catalyst system.

Disclosed is a chemical process of preparing dehydrohedione from Hedione via α-chlorination and elimination steps. The process can be conducted in a one-pot process or in a continuous reactor system. Accordingly, a simple and cost effective process of preparing cis-Hedione enriched products is developed through reduction of dehydrohedione in the presence of a chiral catalyst system.

Disclosed is a chemical process of preparing dehydrohedione from Hedione via α-chlorination and elimination steps. The process can be conducted in a one-pot process or in a continuous reactor system. Accordingly, a simple and cost effective process of preparing cis-Hedione enriched products is developed through reduction of dehydrohedione in the presence of a chiral catalyst system.

The present invention relates to a sacubitril intermediate and a preparation method thereof. The sacubitril intermediate disclosed herein can be prepared by a deprotection reaction of a compound. In addition, the intermediate can be used as a raw material to synthesize sacubitril.

The present invention relates to a sacubitril intermediate and a preparation method thereof. The sacubitril intermediate disclosed herein can be prepared by a deprotection reaction of a compound. In addition, the intermediate can be used as a raw material to synthesize sacubitril.

A novel process for preparation of compounds of formula (I) used in the synthesis of Pinoxaden. The intermediate is a substituted phenyl malonic esters of formula (I), where R is C.sub.1-C.sub.4 alkyl, straight or branched chain.

A novel process for preparation of compounds of formula (I) used in the synthesis of Pinoxaden. The intermediate is a substituted phenyl malonic esters of formula (I), where R is C.sub.1-C.sub.4 alkyl, straight or branched chain.

A novel process for preparation of compounds of formula (I) used in the synthesis of Pinoxaden. The intermediate is a substituted phenyl malonic esters of formula (I), where R is C.sub.1-C.sub.4 alkyl, straight or branched chain.