摘要:
Processes are disclosed for preparing 3-hydroxymethylcyclopentanone compounds, which are useful as intermediates in the preparation of HIV chemokine CCR-5 receptor antagonists. A process is described in which the compounds are prepared by opening the cyclopropyl ring of a (1-alkoxycarbonyl-2-oxo)-trans-bicyclo[3.1.0]hexane compound by addition of a nucleophile to the cyclopropyl ring, and then decarboxylating the resulting 2-alkoxycarbonyl-3-(Nu-methyl)-cyclopentanone (Nu=the added nucleophilic group) via base solvolysis. Also described is a process for preparing the bicyclo[3.1.0]hexane precursors by the catalyzed cyclopropanation of a suitable alpha-diazo-beta-ketoester. The preparation of the alpha-diazo-beta-ketoesters and precursors thereto are also disclosed.
摘要:
A novel process is provided for the preparation of 3-(5,6,7,8-tetrahydro-[1,8]-naphthyridin-2-yl)-propylamine which is useful in the synthesis of &agr;v integrin receptor antagonists. Also provided are useful intermediates obtained from the process.
摘要:
A process of synthesizing a compound of formula 1: ##STR1## wherein P and P' each independently represent H or a protecting group, R.sup.1 represents H or C.sub.1-4 alkyl, andHal represents a halogen selected from Cl, Br and I, comprising: reacting a compound of formula 2: ##STR2## wherein P, P' and R.sub.1 are as defined above with an N,O-di-C.sub.1-4 alkyl hydroxylamine in the presence of a carbodiimide to produce a compound of formula 3: ##STR3## reacting compound 3 with a compound of formula 4:MetCH.sub.2 SiR.sub.2 R.sub.3 R.sub.4 4wherein Met represents lithium or halomagnesium;R.sub.2, R.sub.3 and R.sub.4 are C.sub.1-4 alkyl or C.sub.1-4 alkoxy, and the halo portion of halomagnesium is Cl, Br or I, to produce a compound of formula 5: ##STR4## and reacting compound 5 with a halogenating agent to produce a compound of formula 1.
摘要翻译:合成式1化合物的方法:其中P和P'各自独立地表示H或保护基,R 1表示H或C 1-4烷基,Hal表示选自Cl,Br和I的卤素,其包括:使 式2的化合物:其中P,P'和R 1如上所定义,与碳原子数为3的化合物反应形成式III化合物:使化合物3与化合物 式4:MetCH 2 SiR 2 R 3 R 44,其中Met表示锂或卤代镁; R2,R3和R4是C1-4烷基或C1-4烷氧基,卤代卤素的卤代部分是Cl,Br或I,以产生式5的化合物:使化合物5与卤化剂反应,生成化合物 公式1。
摘要:
A chiral resolution process is described for the purification of a substituted chiral quinazoline, by salt formation with a resolving agent, followed by crystallization.
摘要:
This invention relates to novel cephem compounds of high antimicrobial activity of the formula ##STR1## wherein R.sup.1 is amino;R.sup.2 is carboxy or a protected carboxy group;A is hydroxy (lower) alkylene, amino (lower) alkylene, protected amino (lower) alkylene, lower alkenylene, hydroxyimino (lower) alkylene, lower alkoxyimino (lower) alkylene, or lower alkenyloxyimino (lower) alkylene; andR.sup.3 is carboxy or a protected carboxy group,and pharmaceutically acceptable salts thereof.
摘要:
This invention relates to novel cephem compounds of high antimicrobial activity, said compounds being of the formula: ##STR1## wherein R.sup.1 is a group of the formula: ##STR2## in which R.sup.5 is amino or a protected amino group; and R.sup.6 is lower alkyl, lower alkenyl, lower alkynyl, cycloalkyl, cyclo(lower)alkenyl, aryl, ar(lower)alkyl, or halogen-substituted ar(lower)alkyl;R.sup.2 is carboxy or a protected carboxy group;A is hydroxy(lower)alkylene, amino(lower)alkylene, protected amino(lower)alkylene, lower alkenylene, hydroxyimino(lower)alkylene, lower alkoxyimino(lower)alkylene, or lower alkenyloxyimino(lower)alkylene; andR.sup.3 is carboxy or a protected carboxy group, and pharmaceutically acceptable salts thereof.
摘要:
Processes for the preparation of certain [3.1.0]hexane derivatives which are useful as mGluR agonists, and intermediates prepared during such processes.
摘要:
The present invention is directed to a process for preparing α,α disubstituted γ-lactam derivatives of formula (I) that are useful as neurokinin-1 (NK-1) receptor antagonists, and inhibitors of tachykinin and in particular substance P. The compounds are useful in the treatment of certain disorders, including emesis, urinary incontinence, depression, and anxiety.
摘要:
A process of synthesizing a carbapenem compound of formula (6) is disclosed, wherein R represents H or methyl, P and P* independently represent H or protecting groups and each R1 is independently selected from: H, halo, OH, OP wherein P is a protecting group, C1-6 alkyl or C1-6 alkyl substituted with 1-3 of halo, OH, OP, NH2, NHC1-4 alkyl or N(C1-4 alkyl)2, comprising reacting a carbapenem of formula (4′) with a compound of formula (7), wherein R, R1, P and P* are as previously defined and R2 represents acetate, C(O)OR′ or P(O)(OR″)2, wherein R′ and R″ independently represent Clot alkyl, benzyl or aryl, in the presence of a catalyst to produce a compound of formula (6).
摘要:
A second optical component is an optical fiber bundle charged in a clearance between an inner cylinder and an outer cylindrical outer peripheral part in the form of a ring. These elements are integrated with each other, and forward-end-surfaces thereof are on concentric circles. A ring of the forward-end-surface of the outer peripheral part is larger in width than the ring of the forward-end-surface of the second optical component. A first optical component charged with an optical fiber bundle is slidably inserted into and engaged in the cylinder inside the second optical component, so that the forward-end-surface of the first optical component can project or retract from the forward-end-surface of the outer peripheral part. The outer peripheral part is brought into contact with a human body and force for pressing a measured region is changed by sliding the first optical component for measuring absorption spectra between the first and second optical components under different values of pressing force, thereby obtaining a difference absorbance spectrum under different states of pressurization.