• An NMR spectroscopic investigation of functional group selectivity of lipase-catalysed reactions of 11-acetyl prostaglandins E1 and E2Villo, Ly; Tamp, Sven; Vallikivi, Imre; Järving, Ivar; Pehk, Tõnis; Parve, OmarProceedings of the 9th International Symposium on Biocatalysis and Biotransformations - (Biotrans 2009) Held in Bern, Switzerland 5-9 July 20092010 / p. 66
• A chemoenzymatic approach to the preparation of optically active alpha-bromo-omega-hydroxy aldehyde hemiacetalsParve, Omar; Vallikivi, Imre; Lahe, Lilja; Sikk, Peeter; Käämbre, Tuuli; Lille, ÜloProceedings of the Estonian Academy of Sciences. Chemistry1997 / 4, p. 186-190
• Lipase action on some non-triglyceride substratesVallikivi, Imre; Lille, Ülo; Lõokene, Aivar; Metsala, Andrus; Sikk, Peeter; Tõugu, Vello; Vija, Heiki; Villo, Ly; Parve, OmarJournal of molecular catalysis B : enzymatic2003 / 5/6, p. 279-298 : ill https://www.sciencedirect.com/science/article/abs/pii/S1381117703000432
• Lipase-catalysed acylation of prostanoidsParve, Omar; Järving, Ivar; Martin, Ivar; Metsala, Andrus; Vallikivi, Imre; Aidnik, Madis; Pehk, Tõnis; Samel, NigulasBioorganic & medicinal chemistry letters1999 / p. 1853-1858: ill
• Lipase-catalysed derivatisation of prostanoidsParve, Omar; Vallikivi, Imre; Martin, Ivar; Järving, Ivar; Samel, Nigulas11th European Symposium on Organic Chemistry : Göteborg, Sweden, July 23-28, 1999 : programme and abstracts1999 / p. P179
• Lipase-catalysed enantioselective hydrolysis : interpretation of the kinetic results in terms of frontier orbital localisationParve, Omar; Vallikivi, Imre; Metsala, Andrus; Lille, Ülo; Tõugu, Vello; Sikk, Peeter; Käämbre, Tuuli; Vija, Heiki; Pehk, TõnisTetrahedron1997 / 13, p. 4889-4900
• Lipase-catalysed enantioselective hydrolysis of bicyclo[3.2.0]heptanol esters in supercritical carbon dioxideParve, Omar; Vallikivi, Imre; Lahe, Lilja; Metsala, Andrus; Lille, Ülo; Tõugu, Vello; Vija, Heiki; Pehk, TõnisBioorganic & medicinal chemistry letters1997 / 7, p. 811-816
• Lipase-catalysed reactions of prostaglandinsVallikivi, Imre2004 https://www.ester.ee/record=b1990575*est
• Lipase-catalysed regioselective acylation/deacylation of prostanoidsVallikivi, Imre; Järving, Ivar; Metsala, Andrus; Pehk, Tõnis; Parve, OmarInternational Conference on Organic Synthesis : Vilnius, 2000, June 26-29 : program and abstracts2000 / p. [82]
• Lipase-catalyzed stereoresolution of long-chain 1,2-alkanediols: a screening of preferable reaction conditionsParve, Jaan; Reile, Indrek; Aid, Tiina; Kudrjašova, Marina; Müürisepp, Aleksander-Mati; Vallikivi, Imre; Villo, Ly; Aav, Riina; Pehk, Tõnis; Vares, Lauri; Parve, OmarJournal of molecular catalysis B : enzymatic2015 / p. 60-69 : ill https://doi.org/10.1016/j.molcatb.2015.03.006 https://www.scopus.com/sourceid/17619 https://www.scopus.com/record/display.uri?eid=2-s2.0-84961358849&origin=inward&txGid=51d7ef33a6a9570f5596fff482b3e6fe https://jcr.clarivate.com/jcr-jp/journal-profile?journal=J%20MOL%20CATAL%20B-ENZYM&year=2015 https://www.webofscience.com/wos/woscc/full-record/WOS:000355055100009
• NMR monitoring of lipase-catalyzed reactions of prostaglandins : preliminary estimation of reaction velocitiesVallikivi, Imre; Järving, Ivar; Pehk, Tõnis; Samel, Nigulas; Tõugu, Vello; Parve, OmarJournal of molecular catalysis B : enzymatic2004 / p. 15-19 : ill
• Prostanoidide lipaas-katalüütiline atsüleerimineParve, Omar; Vallikivi, Imre; Martin, Ivar; Järving, Ivar; Samel, NigulasXXV Eesti keemiapäevad : teaduskonverentsi ettekannete referaadid = 25th Estonian Chemistry Days : abstracts of scientific conference1999 / lk. 129-130
• Prostanoidide reaktsioonid ja molekulaarmodelleerimine Candida antarctica lipaas B aktiivtsentrisVallikivi, Imre; Pehk, Tõnis; Fransson, Linda; Hult, Karl; Parve, OmarXXVI Eesti keemiapäevad : teaduskonverentsi ettekannete referaadid = 26th Estonian Chemistry Days : abstracts of scientific conference2000 / lk. 155-156
• Quantum chemical evaluation of the yield of hydroxybenzophenones in the Fries rearrangement of hydroxyphenyl benzoatesMetsala, Andrus; Usin, Eve; Vallikivi, Imre; Villo, Ly; Pehk, Tõnis; Parve, OmarJournal of molecular structure : THEOCHEM2004 / p. 215-221 : ill https://www.sciencedirect.com/science/article/pii/S016612800400750X
• Switched enantiopreference of Humicola lipase for 2-phenoxyalkanoic acid ester homologs can be rationalized by different substrate binding modesBerglund, P.; Vallikivi, Imre; Fransson, Linda; Dannacher, H.; Holmquist, M.; Martinelle, M.; Björkling, F.; Parve, Omar; Hunt, K.Tetrahedron : asymmetry1999 / p. 4191-4202 https://www.sciencedirect.com/science/article/pii/S0957416699004383
• Synthesis of deoxy sugar esters : a chemoenzymatic stereoselective approach affording deoxy sugar derivatives also in the form of aldehydeVillo, Ly; Danilas, Kady; Metsala, Andrus; Kreen, Malle; Vallikivi, Imre; Vija, Sirje; Pehk, Tõnis; Luciano, Saso; Parve, OmarJournal of organic chemistry2007 / p. 5813-5816 https://pubs.acs.org/doi/10.1021/jo062640b
• Tetrahüdropüranüül-blokitud mandelhappe kasutamine kiraalse derivatiseerimisagendinaParve, Omar; Pals, A.; Vallikivi, Imre; Lahe, Lilja; Lille, ÜloXVI Eesti keemiapäevad : teaduskonverentsi ettekannete referaadid = 16th Estonian chemistry days : abstracts of scientific conference1995 / lk. 106-108
• The modelling and kinetic investigation of the lipase-catalysed acetylation of steroisomeric prostaglandinsVallikivi, Imre; Fransson, Linda; Hult, Karl; Järving, Ivar; Pehk, Tõnis; Samel, Nigulas; Tõugu, Vello; Villo, Ly; Parve, OmarJournal of molecular catalysis B : enzymatic2005 / p. 62-69 : ill
• The tetrahydropyranyl-protected mandelic acid : a novel versatile chiral derivatising agentParve, Omar; Aidnik, Madis; Lille, Ülo; Martin, Ivar; Vallikivi, Imre; Vares, Lauri; Pehk, TõnisTetrahedron : asymmetry1998 / p. 885-896: ill https://www.sciencedirect.com/science/article/abs/pii/S0957416698000536
• Thermomyces lanuginosus lipase with closed lid catalyzes elimination of acetic acid from 11-acetyl-prostaglandin E2Villo, Ly; Metsala, Andrus; Tamp, Sven; Parve, Jaan; Vallikivi, Imre; Järving, Ivar; Nigulas, Samel; Lille, Ülo; Pehk, Tõnis; Parve, OmarChemCatChem2014 / p. 1998-2010 : ill https://doi.org/10.1002/cctc.201400019 https://www.scopus.com/sourceid/19900191733 https://www.scopus.com/record/display.uri?eid=2-s2.0-84904547664&origin=inward&txGid=4b17c1f141aaa2bddcd6760862757a53 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=CHEMCATCHEM&year=2014 https://www.webofscience.com/wos/woscc/full-record/WOS:000340573200024