专利号:US-6639059-B1 优先权日:1999-03-24 标 题 :Synthesis of [2.2.1]bicyclo nucleosides 发明人:KOCHKINE ALEXEI; FENSHOLDT JEF; PFUNDHELLER HENRIK M 权利人:EXIQON AS 摘要:A synthesis of [2.2.1]bicyclo nucleosides which is shorter and provides higher overall yields proceeds via the key intermediate of the general formula III, wherein R4 and R5 are, for instance, sulfonates and R7 is, for instance, a halogen or an acetate. From compounds of the general formula II, such as 3-O-aryl-4-C-hydroxymethyl-1,2-O-isopropylidene-alpha-D-ribofuranose, intermediates of the general formula III are suitable for coupling with silylated nucleobases. Upon one-pot base-induced ring-closure and desulfonation of the formed [2.2.1]bicyclo nucleoside, a short route to each the LNA (Locked Nucleic Acid) derivatives of adenosine, cytosine, uridine, thymidine and guanidine is demonstrated. The use of the 5'-sulfonated ring-closed intermediate also allows for synthesis of 5'-amino- and thio-LNAs.
专利号:US-6734291-B2 优先权日:1999-03-24 标题:Synthesis of [2.2.1]bicyclo nucleosides 发明人:KOCHKINE ALEXEI; FENSHOLDT JEF; PFUNDHELLER HENRIK M 权利人:EXIQON AS 摘要:A synthesis of [2.2.1]bicyclo nucleosides which is shorter and provides higher overall yields proceeds via the key intermediate of the general formula III, wherein R4 and R5 are, for instance, sulfonates and R7 is, for instance, a halogen or an acetate. From compounds of the general formula II, such as 3-O-aryl-4-C-hydroxymethyl-1,2-O-isopropylidene-alpha-D-ribofuranose, intermediates of the general formula III are suitable for coupling with silylated nucleobases. Upon one-pot base-induced ring-closure and desulfonation of the formed [2.2.1]bicyclo nucleoside, a short route to each the LNA (Locked Nucleic Acid) derivatives of adenosine, cytosine, uridine, thymidine and guanidine is demonstrated. The use of the 5'-sulfonated ring-closed intermediate also allows for synthesis of 5'-amino- and thio-LNAs
专利号:US-10125226-B2 优先权日:2013-06-05 标 题 :Scale-up process of bifunctionalized triblock copolymers with secondary and tertiary amines, with application in dewatering and desalting of heavy crude oils 发明人:FLORES SANDOVAL CESAR ANDRES; FLORES OROPEZA EUGENIO ALEJANDRO; LOPEZ ORTEGA ALFONSO; HERNANDEZ CORTEZ JOSE GONZALO; ESTRADA BUENDIA ARISTEO; CASTRO SOTELO LAURA VERONICA; REYES MARTINEZ REYNA; ALVAREZ RAMIREZ FERNANDO; ESTRADA MARTINEZ ARQUIMEDES; VAZQUEZ MORENO FLAVIO SALVADOR 权利人:MEXICANO INST PETROL 摘要:A chemical synthesis process is provided for the functionalization of monodispersed triblock copolymer (POEw-POPy-POEw) with secondary or tertiary amines at a semi-industrial level in glass reactors having a capacity between 1 L and 100 L. The process includes two stages where the first stage uses an alkylsulfonyl or arylsulfonyl chloride to obtain better leaving groups, and the second stage is the nucleophilic substitution with secondary or tertiary amines, to obtain the bifunctionalized triblock copolymers. The main advantage for this process is to reduce the quantity of unitary process done in each stage, the optimization of reaction times, and the stoichiometric relationships.
专利号:US-2003092905-A1 优先权日:1999-03-24 标 题:Synthesis of [2.2.1]bicyclo nucleosides
专利号:WO-2010115869-A1 优先权日:2009-04-03 标 题 :Propofol phosphonyl derivatives, synthesis, and use in long acting formulations 发明人:GONNISSEN YVES RENE JOHANNA PAUL 权利人:SEPS PHARMA N V; GONNISSEN YVES RENE JOHANNA PAUL 摘要:This invention relates to compounds represented by the structural formula (I), and the salts and stereoisomers thereof, wherein: - L is a linker selected from the group consisting of -(CH 2 ) P -O-, a single bond, formula (IA), -(CH 2 ) 1-8 -O-X(O)-, and - p is an integer from 1 to 8, - each R 3 and each R 4 is independently selected from the group consisting of C 1-20 alkyl, C 3-12 alkyl, C 3-12 cycloalkyl-C 1-4 alkyl, saturated heterocyclyl and saturated heterocyclyl-C 1-4 alkyl, and - X and Y are each independently C or S(O), - Z is selected from the group consisting of O, S(O) and NR 5 , - W is selected from the group consisting of halogen, OH, S(O)H and O - M + wherein M + is a monovalent cation; and - R 5 is selected from the group consisting of hydrogen and C 1-10 alkyl. These compounds are useful pharmaceutical agents with improved oral bioavailability.
专利号:WO-0056746-A2 优先权日:1999-03-24 标题 :Improved synthesis of [2.2.1]bicyclo nucleosides