0000000001316760
AUTHOR
K. Pihlaja
showing 5 related works from this author
New national and regional biological records for Finland 9:contributions to Bryophyta and Marchantiophyta 8
2018
Five species of mosses (Bryophyta: Oncophorus demetrii, Oncophorus integerrimus, Oxyrrhynchium speciosum, Sphagnum divinum and Sphagnum medium) and one of liverworts (Marchantiophyta: Kurzia trichoclados) are presented as new for Finland. Seligeria calcarea and Seligeria pusilla, previously thought to be regionally extinct from Finland, are reported to being found again. New records in biogeographical provinces for 74 species of mosses and 36 species of liverworts are listed. Finally, 17 occurrences in provinces are removed due to misidentifications or missing specimens. nonPeerReviewed
NMR, X-Ray and MS Investigations of Ethyl 2-Aroyl-and Ethyl 2-Arylcarbamoyl-4,5- dimethyl-1,2,3,6-tetrahydropyridazine-1- carboxylates: Flexible Mult…
1999
The 1H and 13C NMR spectral assignments of ethyl 2-aroyl-4,5-dimethyl-1,2,3,6-tetrahydropyridazine-1-carboxylates (1a-1h) and ethyl 2-arylcarbamoyl-4,5-dimethyl-1,2,3,6-tetrahydropyridazine-1-carboxylates (2a-2k) are given based on DQF COSY, 1H,13C HMQC and 1H,13C HMBC-measurements; the dynamics of the tetrahydropyridazine ring has been studied by 1H, 1H EXSY-technique and the structure of one congener (4′-methylphenyl-derivative, 2a) has been confirmed by X-ray structure analysis.
Synthesis and structural characterization of cis- and trans-fused 4a,5,6,7,8,8a-hexahydro-2H,4H-1,3-benzodithiines and their 2-methyl and 2,2-dimethy…
2002
Both cis- and trans-fused 4a,5,6,7,8,8a-hexahydro-2H,4H-1,3-benzodithiine together with their 2-methyl and 2,2-dimethyl derivatives were prepared as racemates from the appropriate dithiols obtained via multistep syntheses. The products were characterized by 1 H and 13 C NMR, mass spectrometry, and for two of the cis-fused compounds by X-ray diffraction. 1 H, 1 H vicinal coupling constants indicated that all compounds attain chair-chair conformations as their predominant conformations. All three trans-fused isomers exist in totally biased chair-chair conformations and are essentially conformationally locked, whereas the cis-fused compounds are conformationally mobile and can potentially atta…
CCDC 172657: Experimental Crystal Structure Determination
2002
Related Article: K.D.Klika, L.Janovec, J.Imrich, G.Suchar, P.Kristian, R.Sillanpaa, K.Pihlaja|2002|Eur.J.Org.Chem.|2002|1248|doi:10.1002/1099-0690(200204)2002:73.0.CO;2-H
CCDC 247963: Experimental Crystal Structure Determination
2005
Related Article: H.Kivela, Z.Zalan, P.Tahtinen, R.Sillanpaa, F.Fulop, K.Pihlaja|2005|Eur.J.Org.Chem.|2005|1189|doi:10.1002/ejoc.200400611