Pyrimidinones as reversible metaphase arresting agents
摘要:
5-Halo-N(1)-substituted 2(1H)-pyrimidinones have the ability to cause reversible arrest of mitosis during metaphase, Highly active compounds have a heteroatom (O, S or N) in the beta-position of the N(1)-carbon chain which is further substituted by an aryl group. In vitro data have been provided. It is suggested that reversible metaphase inhibitors can be used as synchronizing agents of cell-cycles by applying them in a sequential manner when a phase-specific cytotoxic drug is used in the treatment of diseases caused by uncontrolled rapidly proliferating cells. The active compounds are prepared from 2-pyrimidinones by alkylation reactions. The key reactants are alpha-chloroalkyl ethers, sulfides and amides; methods for their syntheses have been described.
α-Trimethylsilyl-substitutedsulphoxides and sulphides undergo rearrangement with loss of the silyl group when treated respectively with trifluoroacetic anhydride and with N-halogenosuccinimide in the presence of trifluoroacetic acid, giving α-acyloxysulphides and α-halogenosulphides.
Substituted pyrimidin-2-ones and the salts thereof
申请人:Nyegaard & Co. A.S.
公开号:US04596870A1
公开(公告)日:1986-06-24
Compounds of the general formula: ##STR1## (wherein X represents a halogen atom or a trifluoromethyl group; R.sup.1 and R.sup.2 independently represent a hydrogen atom or a lower alkyl group; Z is --O--, --S--, --SO--, --SO.sub.2 -- or the group --NR.sup.4 -- wherein R.sup.4 is as defined for R hereinafter or represents the group COR.sup.5 in which R.sup.5 represents a hydrogen atom or an optionally substituted aryl, heterocyclic, aralkyl, lower alkyl or lower alkoxy group; R represents a C.sub.6-10 carbocyclic aromatic group or a heterocyclic group containing a 5-9 membered unsaturated or aromatic heterocyclic ring which ring contains one or more heteroatoms selected from O, N and S and optionally carries a fused ring which carbocyclic or heterocyclic group may carry one or more C.sub.1-4 alkyl or phenyl groups, said groups being optionally substituted; or, where Z represents the group >NR.sup.4, the group --ZR may represent a heterocyclic ring optionally carrying a fused ring and/or optionally substituted as defined for R; and R.sup.3 represents a hydrogen atom or a lower alkyl, lower alkenyl, lower alkynyl, lower alkanoyl, lower alkenoyl, C.sub.7-16 aralkyl or C.sub.6-10 arly group or a 5-9 membered unsaturated or aromatic heterocyclic ring); and, where acid or basic groups are present, the salts thereof; are useful in combating abnormal cell proliferation. The compounds of the invention are prepared by inter alia alkylation, ring closure and oxidation.
An expeditious and efficient bromomethylation of thiols: enabling bromomethyl sulfides as useful building blocks
作者:Carolina Silva-Cuevas、Ehecatl Paleo、David F. León-Rayo、J. Armando Lujan-Montelongo
DOI:10.1039/c8ra04002h
日期:——
A new method for the bromomethylation of thiols using paraformaldehyde and HBr/AcOH, minimizes the generation of toxic byproducts. Synthetic utility of α-bromomethyl sulfides was demonstrated through umpolung and free radical chemistry.
Disclosed is a novel process and novel intermediates to prepare [R-(R*,R*)]-N-[3-[1-[5,6-dihydro-4-hydroxy-2-oxo-6-(2-phenylethyl)-6-propy l-2H-pyran-3-yl]propyl]phenyl]-5-(trifluoromethyl)-2-pyridinesulfonamide (XIX) ##STR1## which is a protease inhibitor useful in treating humans infected with the HIV virus.
Anti-trypanosomatid benzofuroxans and deoxygenated analogues: Synthesis using polymer-supported triphenylphosphine, biological evaluation and mechanism of action studies
showed low micromolar IC50 values. The synthetic route to access to these derivatives was an efficient Wittig reaction performed in mild conditions with polymer-supported triphenylphosphine (PS-TPP). Additionally, the benzofurozan analogues, deoxygenated benzofuroxans, were prepared using PS-TPP as reductive reagent in excellent yields. The trypanosomicidal and leishmanocidal activities of the benzofuroxan