摘要:
The present invention encompasses a recombinant bacterium that is capable of producing L-homoserine and methods of using the bacterium for producing L-homoserine.
摘要:
This invention is directed to a process for making a salt of a carboxylic acid. The process comprises contacting a catalyst with an alkaline mixture comprising a primary alcohol. In one embodiment, for example, the catalyst comprises a metal support (preferably a metal sponge support) having a copper-containing active phase at the surface thereof. The support is resistant to deformation under the conditions of the dehydrogenation reaction. In another embodiment, the catalyst comprises a metal sponge having a copper-containing active phase at the surface thereof and a supporting structure containing at least 10% non-copper metal. This invention is also directed to copper-containing catalysts which may, for example, be used in the above process. This invention is further directed to processes for making such catalysts.
摘要:
Provided herein are processes for the production of methionine or selenomethionine from homosehne. In particular, the processes proceed via the production of lactone intermediates.
摘要:
Among its several embodiments, the present invention provides an improved process for the preparation of tetrahydrobenzothiepine-1,1-dioxide compounds; the provision of a process for preparing a diastereomeric mixture of tetrahydrobenzothiepine-1,1-dioxide compounds from a single diastereomer of such compounds; the provision of a process for the preparation of 3-bromo-2-substituted propionaldehyde compounds; and the provision of a process for the preparation of 3-thio-2-substituted propionaldehyde compounds.
摘要:
The present invention relates to the synthesis of a hydrazone beta -keto ester by the reaction of an alkyl diazo ester with a hydrazone aldehyde in the presence of a Lewis acid. In a preferred embodiment, the hydrazone beta -keto ester is then converted into a pyridazinone compound by the reaction with an alkyl acid chloride in the presence of a base, followed by acidification. The present invention also relates to a continuous process for the production of a hydrazone aldehyde comprising contacting a hydrazine and glyoxal, wherein the hydrazine and the glyoxal are added simultaneously to a reactor at a controlled rate.
摘要:
Provided herein are processes for the preparation of N-acylated amines. In particular, the processes comprise contacting an amine with an acid comprising a carboxylic acid group to form the N-acylated amine.
摘要:
This invention is directed to a process for making a salt of a carboxylic acid. The process comprises contacting a catalyst with an alkaline mixture comprising a primary alcohol. In one embodiment, the catalyst comprises a metal supporting structure (preferably a metal sponge supporting structure comprising at least about 10% by weight nickel) having a copper-containing active phase at the surface thereof and iron as a catalyst modifier. The supporting structure is resistant to deformation under the conditions of the dehydrogenation reaction. This invention is also directed to novel nickel-containing catalysts having a copper-containing active phase and iron as a catalyst modifier which may, for example, be used in the above process. This invention is further directed to processes for making such catalysts.