摘要:
A catalyst for isomerization consisting essentially of a salt or complex salt represented by the formula:[ML.sub.m ].sup.n+ [Y].sub.n.sup.- (I)where M is a metal of Group IB, IIA, IIB or VIII of the periodic table, L is a ligand, Y is a conjugated base of a Bronsted acid, m is 0, 1, 2, 3 or 4 and n is 1, 2 or 3.
摘要翻译:用于异构化的催化剂基本上由下式表示的盐或络合盐:[MLm] n + [Y] n-(I)其中M是元素周期表中IB,IIA,IIB或VIII族的金属,L是 配体Y是布朗斯台德酸的共轭碱,m是0,1,2,3或4,n是1,2或3。
摘要:
A process for the production of an N-acyl-.alpha.-amino acid represented by the general formula ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4, independently from each other, represent a hydrogen atom, an alkyl or cycloalkyl group which may be substituted, or an aryl or heteroaromatic group selected from the group consisting of furyl, pyrrolyl, pyridinyl, thienyl and indolyl which may be substituted, which comprises reacting an oxirane represented by the general formula ##STR2## wherein R.sup.1 and R.sup.2 are as defined above, an amide compound represented by the general formulaR.sup.3 CONHR.sup.4 (III)wherein R.sup.3 and R.sup.4 are as defined above, and carbon monoxide in the presence of hydrogen, a cobalt-containing catalyst, and a promoter composed of a compound containing a metal selected from Groups I, II, III and IV of the periodic table.
摘要:
The present invention provides a compound, and method of inhibiting the activity of a Fatty Acid Binding Protein (FABP) comprising contacting the FABP with a compound, having the structure:
摘要:
The invention relates to fluorinated second generation taxoid compounds, pharmaceutical formulations thereof, and their use for inhibiting the growth of cancer cells in a mammal.
摘要:
A compound having the formula Y-A-Z, wherein: A is a phenyl group which is unsubstituted or substituted; Y and Z are substituents at adjacent positions on ring A; Y represents: Z represents: and wherein the remaining variables are as defined in the specification.
摘要:
A compound having the formula Y-A-Z, wherein:A is a 5, 6, or 7 member ring that is monocyclic or is fused to 1 to 3 additional 4 to 8 member rings; wherein ring A and, independently, the fused additional rings are carbocyclic or heterocyclic, and saturated or unsaturated, wherein unsaturated rings are aromatic or non-aromatic; wherein Y and Z are substituents at adjacent positions on ring A;Y represents: Z represents: X and E represent O, S, or NRa or NRb; each of a, b, c, d, e and f independently represents 0 or 1; a+c equals 0, 1, or 2; b+d equals 0, 1, or 2; a+b+c+d+e+f equals 1, 2, or 3; provided that when f is 1, then d is 1, and when d is 0, then f is 0; and when both e and b are 0, then neither R1 nor R2 is chloro or bromo; v represents 0 or 1, provided that when v is 0, then J is hydrogen, a metal ion, or a quaternary ammonium ion, and X is O and G is H;either G is hydrogen, a metal ion, a quaternary ammonium ion, lower alkyl, or comprised of a pharmaceutically active chemical compound or the precursor thereof; or X-G represents a carbonyl-activating group;J is lower alkyl, aryl, heteroaryl, omega-hydroxycarbonyl-(lower alkyl), omega-(lower alkoxy)carbonyl-(lower alkyl), omega-(X-G)-carbonyl-(lower alkyl) group, or comprised of a specific binding agent; and Ra, Rb, R1, R2, R3, R4 are as defined in the specification.
摘要翻译:具有式Y-A-Z的化合物,其中:A为5,6或7元环,其为单环或稠合至1至3个另外的4至8个成员环; 其中环A和独立地稠合的另外的环是碳环或杂环的,饱和或不饱和的,其中不饱和环是芳族或非芳族的; 其中Y和Z是环A上相邻位置的取代基; Y表示:Z表示:X和E表示O,S或NR a或NR b。 a,b,c,d,e和f各自独立地表示0或1; a + c等于0,1或2; b + d等于0,1或2; a + b + c + d + e + f等于1,2或3; 条件是当f为1时,d为1,当d为0时,f为0; 当e和b都为0时,R 1和R 2都不是氯或溴; v表示0或1,条件是当v为0时,J为氢,金属离子或季铵离子,X为O且G为H; G是氢,金属离子,季铵离子,低级烷基,或由药物活性化合物或其前体组成; 或X-G表示羰基活化基团; J是低级烷基,芳基,杂芳基,ω-羟基羰基 - (低级烷基),ω-(低级烷氧基)羰基 - (低级烷基),ω-(XG) - 羰基 - (低级烷基) 粘合剂; R 1,R 2,R 1,R 2,R 3,R 3, R 4如本说明书中所定义。
摘要:
Methods of preparing methylthiomethyloxy taxoids of formula (XXXIV) from baccatin and &bgr;-lactam are presented. These new taxoids display noteworthy anti-tumor and anti-leukemic properties.
摘要:
This invention relates to a taxoid of the formula (I): ##STR1## wherein R.sup.1 is a C.sub.3 -C.sub.5 alkyl or alkenyl or trifluoromethyl radical;R.sup.2 is a C.sub.3 -C.sub.5 branched alkyl radical;R.sup.3 and R.sup.4 are independently selected from hydrogen and hydroxyl protecting groups including functional groups which increase the water solubility of the taxoid antitumor agent;R.sup.5 is a hydrogen, an acyl radical, or an alkoxylcarbonyl or carbamoyl radical; andR.sup.6 is an acyl radical.The compounds of formula I are useful as antitumor agents or their precursors. This invention also relates to a pharmaceutical composition having antineoplastic activity comprising the compound of formula (I) and a physiologically acceptable carrier and method of treatment using the compound of formula I.
摘要:
A process for preparing a 5-perfluoroalkyl-dihydrouracil derivative of the general formula ##STR1## wherein R.sub.f represents a perfluoroalkyl group, each of R.sup.1 and R.sup.2 represents a hydrogen atom, or an alkyl, cycloalkyl, aryl, aralkyl or heterocyclic group, and Y is an oxygen or sulfur atom, which comprises (a) reacting a compound of the general formula ##STR2## wherein X represents a halogen atom or hydroxyl group, with a urea derivative of the general formula ##STR3## provided that when X is a hydroxyl group and at least one of R.sup.1 and R.sup.2 is a hydrogen atom, said reaction is carried out in the presence of a condensing agent, or (b) cyclizing a compound of the general formula ##STR4## and a novel intermediate compound of the above formula (IV).
摘要:
There is provided a novel process for the preparation of a dipeptide represented by the formula: ##STR1## wherein Ar represents an aromatic group; R.sup.1 represents a hydrogen atom, an alkyl group or an aryl group; R.sup.2 represents a hydrogen atom, an alkyl group or an aromatic group; Y represents a hydroxy group, an amino group or an acylamino group, which comprises subjecting a .beta.-lactam compound represented by the formula: ##STR2## wherein Ar, R.sup.1 and R.sup.2 have the same meanings as defined above, and X represents a hydroxy group, an amino group or an acylamino group, an azido group or a benzyloxy group, to hydrogenolysis in the presence of a catalyst. The process can be practiced without any complicated procedure as seen in the conventional processes for the preparation of peptides.