摘要:
Antileukemic compounds of formula (I): ##STR1## in which: R.sup.1 represents hydrogen, linear or branched (C.sub.1 -C.sub.6)-alkoxycarbonyl or substituted or unsubstituted phenylalkoxycarbonyl,R.sup.2 represents any one of the following groups: ##STR2## in which: R.sub.3 or R.sub.4, which are identical or different, represent linear or branched (C.sub.6 -C.sub.19)-alkyl or linear or branched (C.sub.6 -C.sub.19)-alkenyl, and antileukemic products containing the same.
摘要:
Compounds having the structure ##STR1## wherein (Z--COO is the residue of an iodinated aromatic acid;R.sup.1 and R.sup.2 are independently alkyl, fluoroalkyl, cycloalkyl, aryl or aralkyl; andR.sup.3 is H, alkyl, fluoroalkyl, cycloalkyl, aryl, aralkyl, alkoxy, aryloxy, cyano, sulfonate, carboxamido, sulfonamido, CO.sub.2 -alkyl, CO.sub.2 -aryl or CO.sub.2 -aralkyl;are useful as contrast agents in x-ray imaging compositions and methods.
摘要:
3-(3,4,5,6-tetrahydrophthalimido)cinnamic esters I ##STR1## (R.sup.1 =H, halogen; R.sup.2, R.sup.3 =halogen; R.sup.4 =C-organic radical, R.sup.5 =H, CH.sub.3) are prepared by reducing 3-nitrocinnamic esters II ##STR2## with hydrogen in the presence of a catalyst and condensing the resulting 3-aminocinnamic esters III ##STR3## with a 3,4,5,6-tetrahydrophthalic anhydride IV ##STR4## and are valuable active ingredients in crop protection.
摘要:
Compounds having the structure ##STR1## where (Z--COO is the residue of an iodinated aromatic acid;R.sup.1 and R.sup.2 are independently alkyl, fluoroalkyl, cycloalkyl, aryl or aralkyl; andR.sup.3 is H, alkyl, fluoroalkyl, cycloalkyl, aryl, aralkyl, alkoxy, aryloxy, cyano, sulfonate, carboxamido, sulfonamido, CO.sub.2 -alkyl, CO.sub.2 -aryl or CO.sub.2 -aralkyl;are useful as contrast agents in x-ray imaging compositions and methods.
摘要:
The invention relates to a process for the preparation of D-(-)-4-hydroxyphenylglycine and L-(+)-4-hydroxyphenylglycine starting from D.L.-4-hydroxyphenylglycine. According to the invention the D.L.-4-hydroxyphenylglycine is dissolved in a suitable solvent or a mixture of solvents at an increased temperature, which solvent mixture comprises an organic solvent, H.sub.2 SO.sub.4 and water. Then the solution obtained is cooled and to the cooled solution are added D-(-)-4-hydroxyphenylglycine sulphate inoculation crystals for crystallizing the D-(-)-4-hydroxyphenylglycine sulphate, followed by filtering of the formed crystals. For recovery of L-(+)-4-hydroxyphenylglycine sulphate remaining in the mother liquor, the mother liquor is heated, followed by addition of D.L.-4-hydroxyphenylglycine and a solution of H.sub.2 SO.sub.4 and water. The resulting solution is cooled down, followed by addition of L-(+)-4-hydroxyphenylglycine sulphate inoculation crystals, from which mixture after further cooling the L-(+)-4-hydroxyphenylglycine sulphate crystallizes.
摘要:
Comounds having the formula ##STR1## wherein: a is 2 or 3; b is an integer from 0 to 4;Me.sup.(a+) is an ion of an element of atomic number from 57 to 70 or an ion of a transition metal of atomic number 21-29, 42 or 44;E.sup.(b+) is one or more physiologically biocompatible cation of an inorganic or an organic base or amino acid, said cation representing a total positive charge of b units;S is the group --A--O--R wherein:A is --(CH.sub.2).sub.m --; --CH.sub.2 --C(CH.sub.3).sub.2 --; m is an integer from 1 to 5; R is H; linear or branched alkyl of 1 to 8 carbon atoms, said carbon atoms being unsubstituted or substituted by one or more hyroxy group; aralkyl of 1 to 4 aliphatic carbon atoms; phenyl or phenyl substituted by halogen, amino, hydroxy or trifluoromethyl; (poly)-oxa-alkyl of 1 to 10 oxygen atoms and from 3 to 30 carbon atoms;R.sub.1 is R.sub.2 or --CH.sub.2 COOZ; --CH(CH.sub.3)COOZ; --(CH.sub.2).sub.n --N(CH.sub.2 COOZ).sub.2 ; hydroxy-arylalkyl radical in which the aryl radical is unsubstituted or substituted by hydroxy;R.sub.2 is --CH.sub.2 COOZ; --CH(CH.sub.3)COOZ; with the proviso that when R.sub.1 is --CH.sub.2 COOZ or --CH(CH.sub.3)COOZ, R.sub.2 is other than --CH.sub.2 COOZ and --CH(CH.sub.3)--COOZ ##STR2## wherein: R.sub.3 is --CH.sub.2 COOZ; --CH(CH.sub.3)COOZ; a monovalent radical having the structure S--CH--COOZ;X is a direct chemical bond; --O--; --S--; --NH--; --N--CH.sub.2 COOZ; --N--CH(CH.sub.3)COOZ;n is the integer 2 or 3, with the proviso that when X is a direct chemical bond, n is 1, 2 or 3;Z is H or a negative charge;with the proviso that, unless R represents a trifluoromethyl substituted phenyl or R.sub.1 is R.sub.2, Me.sup.(a+) is different from Fe.sup.(2+), Fe.sup.(3+), Gd.sup.(3+) and Mn.sup.(2+) and with the proviso that when R.sub.1 is R.sub.2 every molecule can contain not more than 500 nitrogen atoms.
摘要:
Novel fluorinated diaminoalkyne derivatives are inhibitors of ornithine decarboxylase enzyme and have the following general Formula I: ##STR1## wherein R represents C.sub.1 -C.sub.4 alkyl, or preferably, hydrogen.
摘要:
The present invention relates to methods for the preparation of anilinofumarate, a useful intermediate in the preparation of quinoline-2,3-dicarboxylic acid and in the preparation of 2-(2-imidazolin-z-yl) quinoline-3-carboxylic acid herbicidal agents.
摘要:
The invention features a novel non-invasive approach for imaging, detecting and/or sensing metal ions with improved sensitivity and specificity in a biological sample or tissue. In certain embodiments, the invention provides a MR contrast-based approach for imaging, detecting and/or sensing metal ions in the biological sample/tissue containing various background ions by using 19F-based chemical exchange saturation transfer (CEST) technique.
摘要:
The present invention relates to the discovery of new class of hydrolysable amino acid derivatives and absorbable polyester amides, polyamides, polyepoxides, polyureas and polyurethanes prepared therefrom. The resultant absorbable polymers are useful for drug delivery, tissue engineering, tissue adhesives, adhesion prevention, bone wax formulations, medical device coatings, stents, stent coatings, highly porous foams, reticulated foams, wound care, cardiovascular applications, orthopedic devices, surface modifying agents and other implantable medical devices. In addition, these absorbable polymers should have a controlled degradation profile.