摘要:
The present invention relates to a whole cell catalytic system for the preparation of an enantiomerically enriched a-amino acid from a corresponding hydantoin wherein hydantoinase, L-carbamoylase and hydantoin racemase are coexpressed in a recombinant micro-organism wherein the genes coding for these three enzymes are located on a single replicon. The present invention further relates to the use of such a whole cell catalytic system according in the preparation of an enantiomerically enriched L-α-amino acid from a corresponding hydantoin.
摘要:
A processes which is industrially advantageous in producing antibacterial agents. An industrially advantageous process for producing an intermediate useful in producing antibactrial agents is provided by producing compound (VI-a) in accordance with the following reaction schema.
A process for producing the compound represented by the above formulae and production intermediates thereof.
摘要:
The present invention relates to a process for preparing hydrochloride-free 2-dihaloacyl-3-aminoacrylic esters by reacting acid fluorides with dialkylaminoacrylic acid derivatives.
摘要:
The invention relates to novel compounds according to formula Ia and Ib; (Formula Ia and Ib) wherein A represents substituted or unsubstituted C1-10heteroaryl, C6-14aryl or C6- 10heterocycloalkylaryl; R1 is C1-6alkyl, C2-6alkenyl, C2-6alkynyl, C1-6hydroxyalkyl, C1-6haloalkyl, C1-6amino, C3-6 cycloalkyl, or C1-6heterocycloalkyl, each of which are optionally substituted; X represents -CR3R4-(CR5R6)n-(CR7=CR8)m-(C6-14aryl)r-(C1-10heteroaryl)s-(CR9R10)p- (CR11 = CR12)q, R2 represents C1-6alkyl, C2-6alkenyl, C2-6alkynyl, C1-6hydroxyalkyl, C1-6haloalkyl, C1-6amino, C1-12alkylsilyl, C6-30alkylarylsilyl, C1-10heteroaryl, C6-14aryl, C1-10heterocycloalkyl, C1-10heterocycloalkenyl, C1-8cycloalkyl, C1-18cycloalkenyl, each of which is optionally substituted, or R2 represents hydrogen, carboxy, or hydroxy; or a pharmaceutically acceptable salt, solvate, or ester thereof; to processes for the preparation thereof, to said compounds for use in therapy, to pharmaceutical compositions comprising said compounds, wherein said compounds being useful, e.g. in the treatment of diseases associated with disturbances of CaSR activity, such as hyperparathyroidism.
摘要:
The instant invention is a series of novel mono- and disubstituted 3-propyl gamma aminobutyric acids of Formula (I). The compounds are useful as therapeutic agents in the treatment of epilepsy, faintness attacks, hypokinesia, cranial disorders, neurodegenerative disorders, depression, anxiety, panic, pain, neuropathological disorders, arthritis, sleep disorders, IBS, and gastric damage. Methods of preparing the compounds and useful intermediates are also part of the invention.
摘要:
The radiolabeled non-natural amino acid 1-amino-3- cyclobutane-1-carboxylic acid (ACBC) and its analogs are candidate tumor imaging agents useful for positron emission tomography and single photon emission computed tomography due to their selective affinity for tumor cells. The present invention provides methods for stereo-selective synthesis of syn-ACBC analogs. The disclosed synthetic strategy is reliable and efficient and can be used to synthesize a gram quantity of various syn-isomers of the ACBC analogs, particularly, syn- [18F]-1-amino-3-fluorocyclobutane-1-carboxylic acid (FACBC) and syn- [123I]-1-amino-3-iodocyclobutane-1-carboxylic (IACBC) acid analogs.
摘要:
Selected olefins such as ethylene and α-olefins are polymerized by nickel [II] complexes of certain monoanionic ligands. The polyolefins are useful in many applications such as molding resins, film, fibers and others. Also described are many novel nickel compounds and their precursors, as well as novel ligands.