Abstract: Using a computer system, an instruction is received to define or modify a permission constraint corresponding to one or more files. A permission-instruction data set representing the permission constraint is stored in a data store. Subsequent to storing the permission-instruction data, a user request to access a particular file is intercepted. The data store is queried to determine whether any pending permission-instruction data set corresponds to the particular file. In response to the query, it is determined that the permission-instruction data set corresponds to the particular file. A permission constraint of the particular file is added or modified based on the permission-instruction data set. Based on the modified or added permission constraint, it is determined whether and/or an extent to which the user request is authorized. A response to the user request based on the determination as to whether and/or an extent to which the user request is authorized.

Abstract: An instruction is received to define or modify a permission constraint corresponding to one or more file. A period of time is determined, where the period is one during which the defined or modified permission constraint is to apply to the one or more files. It is determined that the one or more files are to be deleted following completion of the period of time. A permission-instruction data set representing the permission constraint and a flag indicating that the one or more files are to be deleted following completion of the period of time are stored in a data store. It is detected that the period of time has ended. The one or more files are deleted in response to the detection.

Abstract: Using a computer system, an instruction is received to define or modify a permission constraint corresponding to one or more files. A permission-instruction data set representing the permission constraint is stored in a data store. Subsequent to storing the permission-instruction data, a user request to access a particular file is intercepted. The data store is queried to determine whether any pending permission-instruction data set corresponds to the particular file. In response to the query, it is determined that the permission-instruction data set corresponds to the particular file. A permission constraint of the particular file is added or modified based on the permission-instruction data set. Based on the modified or added permission constraint, it is determined whether and/or an extent to which the user request is authorized. A response to the user request based on the determination as to whether and/or an extent to which the user request is authorized.

Abstract: This invention relates to novel precursors suitable for 18F radiolabeling of glutamate derivatives, methods for preparing such compounds and its intermediates, compositions comprising such compounds, kits comprising such compounds or compositions and methods for 18F radiolabeling of glutamate derivatives wherein the obtained 18F radiolabeled glutamate derivatives are suitable for diagnostic imaging by Positron Emission Tomography (PET) of proliferative diseases e.g. tumor in mammals.

Abstract: This invention relates to novel precursors suitable for 18F radiolabeling of glutamate derivatives, methods for preparing such compounds and its intermediates, compositions comprising such compounds, kits comprising such compounds or compositions and methods for 18F radiolabeling of glutamate derivatives wherein the obtained 18F radiolabeled glutamate derivatives are suitable for diagnostic imaging by Positron Emission Tomography (PET) of proliferative diseases e.g. tumor in mammals.

Abstract: The present invention relates to a process for preparing 1-O-acyl-2-deoxy-2-fluoro-4-thio-?-D-arabinofuranoses having formula I and intermediates thereof: wherein R1 represents —C(O)—C1-C6-alkyl or —C(O)-aryl; and R2 represents C1-C6-alkyl, C1-C4-perfluoroalkyl or aryl.

Abstract: The present invention relates to a process for preparing 1-O-acyl-2-deoxy-2-fluoro-4-thio-?-D-arabinofuranoses having formula I and intermediates thereof: wherein R1 represents —C(O)—C1-C6-alkyl or —C(O)-aryl; and R2 represents C1-C6-alkyl, C1-C4-perfluoroalkyl or aryl.

Abstract: The present invention relates to a process for preparing 1-O-acyl-2-deoxy-2-fluoro-4-thio-?-D-arabinofuranoses having formula I and intermediates thereof: wherein R1 represents —C(O)—C1-C6-alkyl or —C(O)-aryl; and R2 represents C1-C6-alkyl, C1-C4-perfluoroalkyl or aryl.

Abstract: The present invention relates to a process for preparing 1-O-acyl-2-deoxy-2-fluoro-4-thio-?-D-arabinofuranoses having formula I and intermediates thereof: wherein R1 represents —C(O)—C1-C6-alkyl or —C(O)-aryl; and R2 represents C1-C6-alkyl, C1-C4-perfluoroalkyl or aryl.

Abstract: The new intermediate products of general formula I ##STR1## in which R.sup.1 stands for a hydrogen atom or a straight-chain or branched alkyl group with 1 to 4 carbon atoms,R.sup.2 stands for a hydrogen atom or a methyl group,R.sup.3 stands for a hydrogen atom,R.sup.4 stands for an acyloxy group with 1 to 4 carbon atoms in the acyl radical orR.sup.3 and R.sup.4 together stand for a keto-oxygen atom, are suitable in an excellent way for introducing a .DELTA..sup.1 double bond in the steroid skelton with the simultaneous presence of a .DELTA..sup.4 double bond, as well as a saturated carbonyl group, by clevage of hydrogen iodide with a base in an amidic solvent at elevated temperature. If R.sup.2 stands for a hydrogen atom, the A-ring is aromatized after the hydrogen iodide cleavage. For the production of a new intermediate products, special iodization processes, which partially also allow a stereoselective control of the iodization, are used.

Abstract: The invention concerns a process for preparing (1S,2S,3R,5R)-2-[(3S)-2-halo-3-hydroxy-1-alken(ynyl)]-3-trialkylsilyloxy-7 ,7-(2,2-dimethyltrimethylenedioxy)-bicyclo[3.3.0]octane compounds of general Formula I ##STR1## wherein X is chlorine or bromine,R.sub.1 can mean straight-chain or branched alkyl of up to 6 carbon atoms, straight-chain or branched alkenyl of up to 6 carbon atoms, straight-chain or branched alkynyl of up to 6 carbon atoms,R.sub.2, R.sub.3, R.sub.4 can be in each case identical or different and can mean C.sub.1 -C.sub.4 -alkyl and phenyl optionally substituted by C.sub.1 -C.sub.4 -alkyl groups, wherein the 13,14-double bond has the trans configuration with respect to the C chain, by stereoselective reduction of an .alpha.-halo-enone of general Formula II ##STR2## wherein X, R.sub.1, R.sub.2, R.sub.3, R.sub.4 have the meanings given above,with a reagent produced from diisobutyl aluminum hydride and 2,6-di-tert-butyl-4-methylphenol.

Abstract: Novel 7-(Aryloxy)-2-naphthoxyalkanecarboxylic acid derivatives of the formula I ##STR1## in racemic or separated isomeric form, have herbicidal activity.