摘要:
A medicament for prophylaxis or treatment of bone marrow suppression, for treatment of infectious diseases and for increasing the number of leukocytes, which comprise as an active ingredient a sulphostin-related compound represented by general formula (I): wherein n is an integer of 0 to 3, or a pharmacologically acceptable salt thereof.
摘要:
Provided are novel processes for the efficient production of L-epi-2-inosose and epi-inositol which are useful either as various medicines or intermediates for the syntheses of various medicines. In the processes, there is used inexpensive myo-inositol as a starting compound. That is, there is now developed a new process which comprises reacting myo-inositol with a gram-negative bacterium capable of converting myo-inositol into L-epi-2-inosose, and thereby producing L-epi-2-inosose by conversion of myo-inositol into L-epi-2-inosose. Further, a novel process is provided, which comprises reacting the so produced L-epi-2-inosose with a reducing agent made of an alkali metal boron hydride or any other alkali metal hydride in an aqueous reaction medium, to produce epi-inositol and myo-inositol, and then isolating epi-inositol from the resulting reaction product composed of the epi-inositol and myo-inositol.
摘要:
Provided is a process for producing an isocoumarin-3-yl-acetic acid derivative, characterized by reacting a homophthalic acid derivative represented by a formula: (wherein Rc, R2 and R are mainly protecting groups) with a malonic acid derivating represented by a formula: (wherein R is an organic group including a lower alkyl group; R3 is a protecting group for a carboxyl group; and X is a halogen atom or a —OM group (wherein M is alkaline metal or alkaline earth metal)). According to the above process, various isocoumarin-3-yl-acetic acid derivatives can efficiently be provided.
摘要:
A novel amino acid derivative represented by the general formula (I) shown below or a salt thereof have now been provided by chemical synthesis, and it has been found that these new compounds stimulate proliferation and physiological activities of the T cells of mammals, have an immunomodulating activity and also have an antitumor activity or a carcinostatic activity. It has also been found that these new compounds have an effect of stimulating the proliferation of hematopoietic stem cells. wherein y is 0 or 1; R1 represents an unsubstituted C1-C8 alkyl group or others; R2 represents a hydrogen atom, a C1-C5 alkyl group or others; R3 represents a hydrogen atom, a C1-C8 alkyl group or others; R4 represents a hydrogen atom, a C1-C3 alkyl group or others; R5 represents a group —OR42, a group or others.
摘要翻译:现在已经通过化学合成提供了由下述通式(I)表示的新型氨基酸衍生物或其盐,并且已经发现这些新化合物刺激哺乳动物T细胞的增殖和生理活性,具有 免疫调节活性,也具有抗肿瘤活性或制癌活性。 还发现这些新化合物具有刺激造血干细胞增殖的作用,其中0或1; R1代表未取代的C 1 -C 8烷基或其它; R 2表示氢原子,C 1 -C 5烷基 基团或其它基团; R 3表示氢原子,C 1〜C 8烷基等; R 4表示氢原子,C 1〜C 3烷基等; R 5表示基团-OR 42,基团等。
摘要:
7-O-(4-Amino-2,4,6-trideoxy-2-fluoro-&agr;-L-talopyranosyl)-daunomycinone or -adriamycinone is now synthesized as a novel daunomycinone or adriamycinone derivative having the general formula wherein R is a hydrogen atom or hydroxyl group. These novel compounds according to this invention exhibit excellent antitumor activities and have a high solubility in water, and hence they are useful as an antitumor agent.
摘要:
Novel amide derivatives of amythiamicin are now provided, which are soluble in water and exhibit antibacterial activities, some of which exhibit an excellent antibacterial activity against methicillin-resistant Staphylococcus aureus (MRSA).
摘要:
Compounds of the formula (I) ##STR1## wherein R is a hydrogen atom or a C.sub.1-6 alkyl group and n is an integer of 0 or 1, and pharmaceutical preparations thereof are provided. These pharmaceutical preparations are useful for the prevention or treatment of diseases associated with an abnormality in immunological regulatory function or vascularization.
摘要:
A pharmaceutical composition for treating diarrhea comprising an anti-diarrhea effective amount of conagenin or a salt thereof, and a pharmaceutically acceptable carrier. The pharmaceutical composition is particularly useful against diarrhea caused by the administration of cancer chemotherapeutic agents.
摘要:
Now are provided (R)-3,6-diamino-N-(.omega.-aminoalkyl)-hexanamides which are novel compounds having the general formula (I): ##STR1## wherein n stands for 2-5, and which may be for example, (R)-3,6-diamino-N-(2-aminoethyl)hexanamide (n=2) and (R)-3,6-diamino-N-(3-aminopropyl)hexanamide (n=3). Their preparation process is also provided. These novel compounds and acid addition salts thereof have activities inhibitory against Gram-positive bacteria, Gram-negative bacteria and AIDS virus, as well as tumor cells and are chemically stable. These novel compounds and their salts are useful as chemotherapeutic agents for diseases caused by these bacteria or virus and also as antitumor agent.
摘要:
An object of this invention is to provide a novel process for the synthesis of a 2'-deoxy-2'-halocoformycin having an inhibitory activity against adenosine deaminase in a practically high yield. Thus, there is provided a process comprising multi-stage reactions with using as the starting intermediate a tert-butyl 1-(3,5-di-O-acyl-2-deoxy-2-halo-.beta.-D-ribofuranosyl or arabinofuranosyl)-5-aminoimidazole-4-carboxylate of formula (II) ##STR1## whereby there are produced a 2'-deoxy-2'-halocoformycin or a 2'-deoxy-2'-epi-2'-halocoformycin of formula (I-a) ##STR2## and also a 2'-deoxy-8-epi-2'-halocoformycin or a 2'-deoxy-8,2'-diepi-2'-halocoformycin of formula (I-b) ##STR3## It is expectable that a 2'-deoxy-2'-halocoformycin and epimers thereof are useful as a drug for lymphocytic leukemias and as drugs for various diseases attributable to the actions of adenosine deaminase.