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21*Lukevits E.; Arsenyan P. Unsaturated germanes and stannanes in the synthesis of nitrogen-containing heterocycles by [2+3]-cycloaddition. Chem. Heterocycl. Compd. 1998, 34(9), 989-1000.      

22*Starchenkov I.B.; Andrianov V.G.; Mishnev A.F. Chemistry of furazano[3,4-b]pyrazine. 6. 1,2,3-triazolo[4,5-b]furazano[3,4-b]pyrazines. Chem. Heterocycl. Compd. 1998, 34(9), 1081-1085.      

23Ābele E.; Abele R.; Rubina K.; Popelis J.; Sleikša I.; *Lukevics E. Alkylation of aryl and hetaryl ketoximes with alkyl iodides prepared in situ from alkyl chlorides under phase transfer catalysis conditions. Synth. Commun. 1998, 28(14), 2621-2633.      

24*Ābele E.; Abele R.; Rubina K.; Lukevics E. Chlorination of pyridylacetylenes in the phase transfer catalytic system CCl4/KOH/18-crown-6. Chem. Heterocycl. Compd. 1998, 34(1), 122-123.      

25*Ābele E.; Abele R.; Gaukhman A.; Lukevics E. Synthesis of alkyl heteryl ethers from acetates under interphase catalysis conditions in a liquid/solid system. Chem. Heterocycl. Compd. 1998, 34(1), 40-43.      

26Rozhkov E.; Piskunova I.; Gol'd M.; Kalvin'sh I. Cyclic hydrazides. 2. synthesis of substituted 4-hydroxy-1-oxo-1,2-dihydropyridazino[4,5-b]quinoline 5-oxides. Chem. Heterocycl. Compd. 1998, 34(2), 222-231.      

27*Uhlen S.; Dambrova M.; Nasman J.; Schioth H.B.; Gu Y.; Wikberg-Matsson A.; Wikberg J.E.S. [3H]RS79948-197 binding to human, rat, guinea pig and pig α(2A)-, α(2B)- and α(2C)-adrenoceptors. Comparison with MK912, RX821002, rauwolscine and yohimbine. Eur. J. Pharmacol. 1998, 343(1), 93-101.      

28*Loja D.; Loļa D.; Beļakovs S.; Gavars M.; Turovskis I.; Kemme A. Synthesis of alkylidene cyclopentenones. Enolization of 4-substituted cyclopent-4-ene-1,3-diones. Tetrahedron 1998, 54(8), 1589-1600.      

29Sipyagin A.M.; Kolchanov V.V.; Aliev Z.G.; Karakhanova N.K.; Lebedev A.T. Reactions of polyhalogenopyridines. 15. Reaction of isomeric tetrachlorocyanopyridines and pentachloropyridine with potassium isopropyltrithiocarbonate. Chem. Heterocycl. Compd. 1998, 34(3), 297-307.      

30*Jansone D.; Leite L.; Fleisher M.; Popelis J.; Mazheika I.; Lukevics E.; Melikyan G.; Avetisyan A. Reaction of heterocyclic aldehydes with methyl derivatives of unsaturated γ- and δ-lactones. Chem. Heterocycl. Compd. 1998, 34(3), 267-270.      

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