Collect. Czech. Chem. Commun.
1986, 51, 1764-1771
https://doi.org/10.1135/cccc19861764
Synthesis of anomeric 5-cyclopropyl-2'-deoxyuridines and 1H NMR spectroscopic study of their conformation
Ivan Bašnák, Jiří Farkaš, Jaroslav Zajíček and Zdeněk Havlas
Institute of Organic Chemistry and Biochemistry, Czechoslovak Academy of Sciences, 166 10 Prague 6
Individual author index pages
Other CCCC articles of these authors
- Martin Lepšík, Martin Srnec, Drahomír Hnyk, Bohumír Grüner, Jaromír Plešek, Zdeněk Havlas and Lubomír Rulíšek*
exo-Substituent effects in halogenated icosahedral (B12H122–) and octahedral (B6H62–) closo-borane skeletons: chemical reactivity studied by experimental and quantum chemical methods
2009, Vol. 74, Issue 1, pp. 1–27 [Abstract] - Rudolf Zahradník, Martin Srnec and Zdeněk Havlas*
Electronic Spectra of Conjugated Polyynes, Cumulenes and Related Systems: A Theoretical Study
2005, Vol. 70, Issue 5, pp. 559–578 [Abstract] - Daniel Svozil*, Pavel Jungwirth and Zdeněk Havlas
Electron Binding to Nucleic Acid Bases. Experimental and Theoretical Studies. A Review
2004, Vol. 69, Issue 7, pp. 1395–1428 [Abstract] - Zdeněk Havlas*, Mojmír Kývala and Josef Michl
Spin-Orbit Coupling in Biradicals. 4. Zero-Field Splitting in Triplet Nitrenes, Phosphinidenes, and Arsinidenes
2003, Vol. 68, Issue 12, pp. 2335–2343 [Abstract] - Zdeněk Havlas* and Hans Bock
Enhanced Long-Range Si···N Interactions in Organosilicon Cations. A Theoretical Study
2001, Vol. 66, Issue 3, pp. 473–482 [Abstract] - Josef Růžička, Ludvík Streinz*, David Šaman, Zdeněk Havlas, Zdeněk Wimmer, Marie Zarevúcka, Bohumír Koutek and Ladislav Lešetický
Chlorofluoroacetic Acid as a Highly Versatile Derivatizing Agent: Assignment of Stereochemistry to Esters of Chiral Alcohols
2000, Vol. 65, Issue 5, pp. 695–707 [Abstract] - Pavel Vlček, Zdeněk Havlas* and Zdeněk Pavlíček
Are 1,4-Dihydropyrazines Antiaromatic? Ab initio Study of 1,4-Dihydropyrazines and Their Tetrahydro Derivatives
1999, Vol. 64, Issue 4, pp. 633–648 [Abstract] - Zdeněk Havlas and Josef Michl
Spin-Orbit Coupling in Biradicals. 3. Heavy Atom Effects in Carbenes
1998, Vol. 63, Issue 9, pp. 1485–1497 [Abstract] - Pavel Hobza and Zdeněk Havlas
Counterpoise-Corrected Potential Energy Surfaces of Simple Hydrogen-Bonded Systems
1998, Vol. 63, Issue 9, pp. 1343–1354 [Abstract] - Zdeněk Havlas and Hans Bock
Bare Molecular Anions of Unsaturated Hydrocarbons: Density Functional Charge and Spin Distributions Based on Their Single Crystal Structures
1998, Vol. 63, Issue 8, pp. 1245–1263 [Abstract] - Hubert Hřebabecký, Miloš Buděšínský, Milena Masojídková, Zdeněk Havlas and Antonín Holý
1-(3,5-O-Alkylidene-2-deoxy-4-C-hydroxymethyl-α-L-threo-pentofuranosyl)uracils
1997, Vol. 62, Issue 6, pp. 957–970 [Abstract] - Jaroslav Zajíček, Ivan Rosenberg, Radek Liboska, Zdeněk Točík, G. Victor Fazakerley, Wilhelm Guschlbauer and Antonín Holý
Conformational Studies on Diribonucleoside Monophosphate Analogs Containing a Nonisosteric, Isopolar, Phosphonate-Based Internucleotide Linkage
1997, Vol. 62, Issue 1, pp. 83–98 [Abstract] - Daniel Alexander, Petr Holý, Pavel Fiedler, Zdeněk Havlas and Jiří Závada
Symmetrical Tris(4,6-diamino-5-methylene-2-pyrimidones): New Building Blocks for Self-Assembly of Hollow Spherical Supramolecules Locked by Hydrogen Bonds
1996, Vol. 61, Issue 10, pp. 1464–1472 [Abstract] - Jaroslav Zajíček, Jeffrey F. Ellena, Gerald D. Williams, Mohammad A. Khadim and Michael F. Brown
Molecular Dynamics of Vesicles of Unsaturated Phosphatidylcholines Studied by 13C NMR Spin-Lattice Relaxation
1995, Vol. 60, Issue 5, pp. 719–735 [Abstract] - Miroslav Ledvina and Jiří Farkaš
Cyclization Dichotomy of Esters of 3-Ureido-2-cyano-2-propenoic and 3-Ureido-2-acyl-2-propenoic Acids
1994, Vol. 59, Issue 8, pp. 1841–1852 [Abstract] - Luboš Arnold, Jiří Smrt, Jaroslav Zajíček, Günther Ott, Michael Schiesswohl and Mathias Sprinzl
Dimethylaminomethylene protected purine H-phosphonates in the synthesis of biologically active RNA (24-mer)
1991, Vol. 56, Issue 9, pp. 1948–1956 [Abstract] - Alexander Kasal, Jenny Pokorná and Jaroslav Zajíček
3β,11α,17-Trihydroxy-5-pregnen-20-one 11-hemisuccinate as a haptene for RIA of "17α-hydroxypregnenolone"
1991, Vol. 56, Issue 6, pp. 1340–1347 [Abstract] - Alexander Kasal, Jaroslav Podlaha and Jaroslav Zajíček
A-homo-B,19-dinorandrostanes from 6β-methanesulfonyloxy-5-methyl-19-nor-5β-androst-9-ene derivatives
1991, Vol. 56, Issue 5, pp. 1070–1086 [Abstract] - Rudolf Zahradník, Zdeněk Havlas, B. Andes Hess, Jr. and Pavel Hobza
Properties and reactivity of first and second row hydrides. Introductory remarks, isomerizations, and inversion barriers of the AH2, AH3, AH4 and related systems
1990, Vol. 55, Issue 4, pp. 869–889 [Abstract] - Miroslav Ledvina, Jiří Farkaš, Jaroslav Zajíček, Jan Ježek and Milan Zaoral
An alternative synthesis of O-(2-acetamido-2-deoxy-β-D-glucopyranosyl)-(1→4)-N-acetylnormuramoyl-L-α-aminobutanoyl-D-isoglutamine
1989, Vol. 54, Issue 10, pp. 2784–2794 [Abstract] - Alois Pískala, Naeem B. Hanna, Jaroslav Zajíček and Alois Čihák
Synthesis, molecular conformation and biological activity of 6-amino-5-azacytidine
1989, Vol. 54, Issue 9, pp. 2502–2512 [Abstract] - Alexander Kasal and Jaroslav Zajíček
Spontaneous transannular reaction in Δ9-unsaturated A-homo-B,19-dinorsteroids
1989, Vol. 54, Issue 5, pp. 1327–1335 [Abstract] - Helena Petrusová, Zdeněk Havlas, Pavel Hobza and Rudolf Zahradník
A theoretical study on acetylene dimer, acetylene-s-tetrazine and acetylene-benzene associates
1988, Vol. 53, Issue 11, pp. 2495–2502 [Abstract] - Petr Pracna and Zdeněk Havlas
Ab initio study of the anharmonic properties of dipole moment functions of ammonia and the oxonium ion
1988, Vol. 53, Issue 10, pp. 2175–2190 [Abstract] - František Tureček, Libor Brabec, Tomáš Vondrák, Vladimír Hanuš, Josef Hájíček and Zdeněk Havlas
Sulfenic acids in the gas phase. Preparation, ionization energies and heats of formation of methane-, ethene-, and benzenesulfenic acid
1988, Vol. 53, Issue 9, pp. 2140–2158 [Abstract] - Václav Černý, Jaroslav Zajíček and Miroslav Strnad
2α,3α-Dihydroxy-7-oxa-6-oxo-B-homo-5α-pregnan-21-oic acid and its derivatives as brassinolide analogues
1987, Vol. 52, Issue 1, pp. 215–222 [Abstract] - Petr Kyselka, Zdeněk Havlas and Ivo Sláma
Ion solvation in mixed solvents. An ab initio study
1987, Vol. 52, Issue 1, pp. 14–21 [Abstract] - Petr Kyselka, Zdeněk Havlas and Ivo Sláma
Ion solvation by dipolar aprotic solvents. An ab initio study
1987, Vol. 52, Issue 1, pp. 6–13 [Abstract] - Alexander Kasal and Jaroslav Zajíček
Solvolysis of Westphalen-type compounds
1986, Vol. 51, Issue 7, pp. 1462–1475 [Abstract] - Ladislav Kohout, Vijay Kumar Sethi, Jaroslav Zajíček and Alexander Kasal
Solvolytic reactions of empiric 3-methanesulfonyloxy-7-benzoyloxy-5β,6β-cyclopropanocholestanes
1986, Vol. 51, Issue 2, pp. 436–446 [Abstract] - Petr Kyselka, Zdeněk Havlas and Ivo Sláma
Solvation of ions by dipolar aprotic solvents and water. A CNDO/2 study
1985, Vol. 50, Issue 11, pp. 2493–2508 [Abstract] - Helena Velgová and Jaroslav Zajíček
Reaction of 3,4a-disubstituted 4,4-dimethyl-5,6β-epoxy-A-homo-5β-cholestane derivatives with reducing agents
1985, Vol. 50, Issue 11, pp. 2457–2470 [Abstract] - Milena Masojídková, Jaroslav Zajíček, Miloš Buděšínský, Ivan Rosenberg and Antonín Holý
Conformational study on ribonucleoside O-phosphonylmethyl derivatives by 1H NMR spectroscopy
1985, Vol. 50, Issue 8, pp. 1899–1905 [Abstract] - Jiří Joska, Jan Fajkoš and Jaroslav Zajíček
Synthesis of 3β,4β-cyclopropano-19-nor-A-homosteroids
1985, Vol. 50, Issue 7, pp. 1611–1617 [Abstract] - Jiří Farkaš and Ivo Frič
Synthesis of 2,3,5-tri-O-benzoyl-D-pentofuranosyl cyanides and their CD spectra
1985, Vol. 50, Issue 6, pp. 1291–1299 [Abstract] - Jiří Závada, Václav Pechanec, Jaroslav Zajíček, Ivan Stibor and Antonín Vítek
Effects of salt concentration and counterion on stability of alkali ion-18-crown-6 complexes in aqueous and methanolic solution: A conflicting evidence from potentiometric and sodium-23 NMR studies
1985, Vol. 50, Issue 5, pp. 1184–1193 [Abstract] - Helena Velgová and Jaroslav Zajíček
Oxidation and epoxidation of 4,4-dimethyl-A-homo-5-cholesten-4a-ols
1985, Vol. 50, Issue 1, pp. 114–131 [Abstract] - Miroslav Ledvina and Jiří Farkaš
Alternative synthesis of 4-methyl-2H-1,2,6-thiadiazin-3(6H)-one 1,1-dioxide, a structural analogue of thymine
1984, Vol. 49, Issue 4, pp. 840–851 [Abstract] - Ladislav Kohout and Jaroslav Zajíček
Lead tetraacetate oxidation of 3β-acetoxy-B-homo-5α-cholestan-7aβ-ol
1984, Vol. 49, Issue 1, pp. 301–305 [Abstract] - Jaroslav Zajíček, Miloš Buděšínský and Jiří Farkaš
Conformational study of blocked pentofuranoses and their 1,5-anhydro derivatives by 1H NMR spectroscopy
1984, Vol. 49, Issue 1, pp. 235–243 [Abstract] - Jiří Joska, Jan Fajkoš and Jaroslav Zajíček
Bromination of 19-acetoxy-4β,5-cyclopropano-5β-cholestan-3-one
1983, Vol. 48, Issue 12, pp. 3474–3481 [Abstract] - Jan Fajkoš, Jiří Joska and Jaroslav Zajíček
The bromination of the epimeric 4,5-cyclopropanocholestan-3-ones
1983, Vol. 48, Issue 12, pp. 3455–3473 [Abstract] - Jiří Farkaš
Synthesis of 1,2,4-triazine-3,5(2H,4H)-diones containing electronegative substituents in position 6
1983, Vol. 48, Issue 9, pp. 2676–2681 [Abstract] - Jiří Farkaš, Jaroslav Hapala, Olga Jindrová and Jan Škoda
Reaction of 2,3-dihydro-1,3-6H-oxazine-2,6-dione with aliphatic amines and amino acids
1982, Vol. 47, Issue 11, pp. 2932–2945 [Abstract] - Miroslav Ledvina and Jiří Farkaš
Synthesis of methyl 3-(N'-alkylureido)-2-methyl-2-propenoates and their cyclization to 3-alkyl-5-methyluracils
1982, Vol. 47, Issue 2, pp. 676–688 [Abstract] - Vladimír Král, Zdeněk Arnold and Zdeněk Havlas
Semiempirical and ab initio study of the nature of the C-S bond in sulfonium ylides
1981, Vol. 46, Issue 4, pp. 883–891 [Abstract] - Zdeněk Havlas, Miroslava Synáčková, Hubert Hřebabecký, Jiří Farkaš and Jiří Beránek
NMR and quantum chemical study of empiric 2',3'-cyclic sulphites of nucleosides
1981, Vol. 46, Issue 2, pp. 400–408 [Abstract] - Zdeněk Havlas and Petr Maloň
Molecular geometries - Accuracy test of the PCILO method
1980, Vol. 45, Issue 2, pp. 321–329 [Abstract] - Ivan Bašnák and Jiří Farkaš
Synthesis of uracils substituted in the position 5 or 5,6 with alkyl or cycloalkyl groups and their UV spectra
1979, Vol. 44, Issue 8, pp. 2426–2437 [Abstract] - Tomáš Vaněk, Jiří Farkaš and Jiří Gut
Synthesis of 5-β-D-ribofuranosyl-1,3-thiazole-2-carboxamide - A thiazole analogue of ribavirin
1979, Vol. 44, Issue 4, pp. 1339–1342 [Abstract] - Tomáš Vaněk, Jiří Farkaš and Jiří Gut
Synthesis of 3,5-disubstituted 1,2,4-triazole derivatives - An alternative preparation of the C-analogue of ribavirin
1979, Vol. 44, Issue 4, pp. 1334–1338 [Abstract] - Jiří Farkaš
Synthesis of 5-methyl-2H-1,3-oxazine-2,4(3H)-dione
1979, Vol. 44, Issue 1, pp. 269–274 [Abstract] - Zdeněk Havlas, Pavel Hobza and Rudolf Zahradník
An attempt to construct a hybrid intermolecular potential
1978, Vol. 43, Issue 5, pp. 1356–1365 [Abstract]