摘要:
Materials and methods for preparing (S)-(+)-3-aminomethyl-5-methyl-hexanoic acid and structurally related compounds via enzymatic kinetic resolution are disclosed.
摘要:
The present invention relates to methods of preparing a stereoisomerically enriched compound of formula (I), wherein R6 is hydrogen, comprising treating a compound of formula (I), wherein R6 is chosen from C1-C10 alkyl, C2-C10 alkenyl, C2-C10 alkynyl, —(CR7R8)t(C6-C14 aryl), and —(CR7R8)t(4-10 membered heterocyclic), and wherein said C6-C14 aryl and 4-10 membered heterocyclic are optionally substituted with at least one substituent chosen from halo, C1-C10 alkyl, —OR7, and —N(R7R8), with a biocatalyst in an aqueous solution, an organic solvent, or a mixture of organic and aqueous solvents wherein at least one stereoisomer is selectively hydrolyzed.
摘要:
The invention relates to biocatalytic methods for preparing enantiomerically pure stereoisomers of 1-(2,6-dichloro-3-fluorophenyl)ethanol. Disclosed are methods of preparation of the desired (S)-enantiomer, which methods are based on a combination of enzymatic resolution, chemical esterification and chemical hydrolysis with inversion of 1-(2,6-dichloro-3-fluorophenyl)ethyl esters or stereoselective bio-reduction of 2,6-dichloro-3-fluoro-acetophenone with a biocatalyst such as an enzyme or a microorganism. The chiral (S)-enantiomer can be used in the synthesis of certain enantiomerically enriched, ether linked 2-aminopyridine compounds that potently inhibit auto-phosphorylation of human heptocyte growth factor receptor.
摘要:
The invention relates to biocatalytic methods for preparing enantiomerically pure stereoisomers of 1-(2,6-dichloro-3-fluorophenyl)ethanol. Disclosed are methods of preparation of the desired (S)-enantiomer, which methods are based on a combination of enzymatic resolution, chemical esterification and chemical hydrolysis with inversion of 1-(2,6-dichloro-3-fluorophenyl)ethyl esters or stereoselective bio-reduction of 2,6-dichloro-3-fluoro-acetophenone with a biocatalyst such as an enzyme or a microorganism. The chiral (S)-enantiomer can be used in the synthesis of certain enantiomerically enriched, ether linked 2-aminopyridine compounds that potently inhibit auto-phosphorylation of human heptocyte growth factor receptor.
摘要:
An apparatus comprises an integrated circuit and an open connection detection circuit within the integrated circuit. The integrated circuit includes a plurality of inputs for connecting with a plurality of outputs of a multi-cell battery pack. The open connection detection circuit within the integrated circuit detects an open connection on at least one of the plurality of inputs from the multi-cell battery and generates a fault condition responsive thereto.
摘要:
A robot is used to pick parts from a bin. The robot has a compliant apparatus and one or more tools are connected to the apparatus to perform the picking. The compliant apparatus has mechanisms for monitoring and/or controlling its compliance. The compliant apparatus can have various embodiments. Force sensing can be used during removal of grasped parts from the bin to determine the force exerted on the picking tool(s). The signal indicative of the exerted force can be used by the robot controller to determine the weight of the parts that may be held by the picking tool(s). The robot has one or more devices which can be the picking tool to stir the parts in the bin.
摘要:
A microtray for handling biosubstances comprises a fluid holding structure and a fluid ejection structure. The fluid holding structure includes an array of wells with each well configured to contain at least one biosubstance. The fluid ejection structure is in communication with the fluid holding structure and configured to dispense the at least one biosubstance onto a target media.
摘要:
A holder for a discharge lamp having a bi-pin base includes a housing with two pairs of opposed walls connected to form a lamp base receiving recess therebetween, a resilient clip and an opposed pair of electrical conductors. The clip and the conductor pair are disposed in the housing for gripping the lamp base and for electrically engaging the lamp pins, respectively, of a lamp received into the holder.The housing further includes four internal cooling passages partly formed by two directly facing and opposed rib pairs provided on the respective housing walls. The passages open to the ambient atmosphere. The resilient clip has good thermally conductive properties.