[EN] A PROCESS FOR PREPARING 4-METHYL-4-IMIDAZOLIN-2-ONE AND DERIVATIVES THEREOF
申请人:PFIZER INC.
公开号:WO1986002070A1
公开(公告)日:1986-04-10
(EN) 4-Methyl-4-imidazolin-2-one, useful as a biotin intermediate, is prepared by reacting acetol and urea.(FR) Le 4-méthyl-4-imidazolin-2-one, utile en tant qu'intermédiaire de la biotine, est préparé en faisant réagir de l'acétol avec de l'urée.
(中文) 4-甲基-4-咪唑啉-2-酮是一种有用的生物素中间体,通过将乙醇和尿素反应制备而成。
Biotin intermediates
申请人:Pfizer Inc.
公开号:US04709044A1
公开(公告)日:1987-11-24
In the synthesis of biotin and decarboxybiotin, a more direct method for the conversion of 1,3-diacyl-4-(bromomethyl)-5-[(5-alkoxycarbonylpentanoyl) or hexanoyl]-4-imidazolin-2-ones to 1,3-diacyl-4-[(4-alkoxybutanoyl) or pentanoyl]-1H,3H-thieno(3,4-b)imidazol-2-one via the Bunte salt of the formula ##STR1## wherein R is (C.sub.1 -C.sub.5)alkanoyl or (C.sub.2 -C.sub.5)alkoxycarbonyl, X is methyl or (C.sub.2 -C.sub.5)alkoxycarbonyl and Y is an alkali metal.
Inhibitors of retroviral propagation, methods of treatment and prevention of retroviral infections using the inhibitors, and pharmaceutical compositions including the inhibitors, are disclosed.
Inhibitors of retroviral propagation, methods of treatment and prevention of retroviral infections using the inhibitors, and pharmaceutical compositions including the inhibitors, are disclosed.
POLY(CARBONATE-CO-UREA) COPOLYMERS AND MELT TRANSESTERIFICATION METHOD OF PREPARING THESE COPOLYMERS
申请人:Kamps Jan Henk
公开号:US20080275206A1
公开(公告)日:2008-11-06
Disclosed herein is a poly(carbonate-co-urea-co-ester) copolymer comprising incorporated urea compound, dihydroxy compound and diacid compound residues. Also disclosed herein is a poly(carbonate-co-urea) copolymer comprising incorporated urea compound and dihydroxy compound residues.