This invention provides a prophylactic or therapeutic method for cancer.
A prophylactic or therapeutic method for cancer, which is characterized by selectively inhibiting ErbB-2 (HER2) to block information signals of multimers of the epithelial growth factor receptor family.
A compound represented by the formula:
1
wherein m is 1 or 2, R
1
is a halogen or an optionally halogenated C
1-2
alkyl; one of R
2
and R
3
is a hydrogen atom and the other is a group represented by the formula:
2
wherein n is 3 or 4; R
4
is a C
1-4
alkyl group substituted by 1 or 2 hydroxy groups, or a salt thereof shows tyrosine kinase-inhibiting activity.
Selective Monoalkylation of Acyclic Diols by Means of Dibutyltin Oxide and Fluoride Salts.
作者:Nobuo NAGASHIMA、Masaji OHNO
DOI:10.1248/cpb.39.1972
日期:——
Fluoride anion was found to promote monoalkylation reaction of diols by the stannylene acetal method, and selective monoalkylation of various acyclic diols was accomplished in good yields under mild conditions by employing this new method. Functional groups such as carboxylic acid ester, carboxamide, carbamate, nitrile, alkyl chloride, and ether were not affected under the reaction conditions.
Lipase-Catalyzed Enantiomer Separation of 3-Hydroxy-4-(tosyloxy)butanenitrile: Synthesis of (R)-GABOB (=(3R)-4-Amino-3-hydroxybutanoic Acid) and (R)-Carnitine Hydrochloride (=(2R)-3-Carboxy-2-hydroxy-N,N,N-trimethylpropan-1-aminium Chloride)
作者:Ahmed Kamal、G. B. Ramesh Khanna、Tadiparthi Krishnaji
DOI:10.1002/hlca.200790180
日期:2007.9
Enzymatic resolution of racemic 3-hydroxy-4-(tosyloxy)butanenitrile ((±)-5) by using various lipases in different solvents were studied. The obtained optically pure (3R)-3-(acetyloxy)-4-(tosyloxy)butanenitrile ((R)-6), upon treatment with aqueous ammonia followed by conc. HCl solution, provided (R)-GABOB (=(3R)-4-amino-3-hydroxybutanoic acid; (R)-1). Similarly, reaction of (R)-6 with aqueous trimethylamine
Method for preparing optically active 3,4-dihydroxy butyric acid
申请人:Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
公开号:US04994597A1
公开(公告)日:1991-02-19
The present invention presents a method for preparation of S-3,4-dihydroxy butyronitrile expressed by the structural formula (II) ##STR1## characterized by causing R-3-chloro-1,2-propanediol expressed by the structural formula (I) ##STR2## to react with a cyanating agent. According to this invention, optically active 3,4-dihydroxy butyronitrile and 3,4-dihydroxy butyric acid derivatives may be manufactured economically and efficiently.