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1

Electron impact mass spectra of 2-(2-pyridyl)methylene-1,3-dicarbonyl compounds: Unusual abundance of the [M + 1]+ ion and the effect of stereochemistry

Esko K. Pohjala, Antti O. K. Nieminen

Journal:

Journal of Mass Spectrometry

Year:

1981

Language:

english

File:

PDF, 369 KB

english, 1981

2

ChemInform Abstract: Preparation of 1-Substituted-5-[(2-oxo-2-phenyl)ethyl]imidazoles.

Paula Aulaskari, Markku Ahlgren, Pirjo Vainiotalo, Esko Pohjala

Journal:

Year:

2000

File:

PDF, 28 KB

2000

3

Preparation of 1-substituted-5-[(2-oxo-2-phenyl)ethyl]imidazoles

Paula Aulaskari, Markku Ahlgrén, Pirjo Vainiotalo, Esko Pohjala

Journal:

Journal of Heterocyclic Chemistry

Year:

2000

File:

PDF, 478 KB

2000

4

Bisphosphonic compounds. I. Preparation of 13C- and 14C-labelled clodronate

Vepsäläinen Jouko, Nupponen Heikki, Pohjala Esko

Journal:

Journal of Labelled Compounds and Radiopharmaceuticals

Year:

1991

Language:

english

File:

PDF, 229 KB

english, 1991

5

An improved synthetic method and the first crystal structures for (dihalomethylene)bisphosphonate partial esters

Jouko J. Vepsäläinen, Jussi Kivikoski, Markku Ahlgrén, Heikki E. Nupponen, Esko K. Pohjala

Journal:

Year:

1995

Language:

english

File:

PDF, 866 KB

english, 1995

6

Bisphosphonic compounds v. selective preparation of (dichloromethylene)bisphosphonate partial esters.

Jouko Vepsäläien, Heikki Nupponen, Esko Pohjala

Journal:

Tetrahedron Letters

Year:

1993

Language:

english

File:

PDF, 286 KB

english, 1993

7

Bisphosphonic compounds VIII. A facile and selective one-pot synthesis of P,P-dialkyl (dichloromethylene)bisphosphonate partial esters

Jouko Vepsäläinen, Heikki Nupponen, Esko Pohjala

Journal:

Tetrahedron Letters

Year:

1996

Language:

english

File:

PDF, 206 KB

english, 1996

8

Solid state decomposition studies on some isopropyl clodronate sodium salts

Hannu Rönnkömäki, Lauri H.J. Lajunen, Esko Pohjala

Journal:

Thermochimica Acta

Year:

1991

Language:

english

File:

PDF, 390 KB

english, 1991

9

Synthesis and ocular effects of imidazole nitrolic acid and amidoxime esters

Larisa Oresmaa, Hanna Kotikoski, Matti Haukka, Olli Oksala, Esko Pohjala, Heikki Vapaatalo, Pirjo Vainiotalo, Paula Aulaskari

Journal:

Bioorganic & Medicinal Chemistry Letters

Year:

2006

Language:

english

File:

PDF, 227 KB

english, 2006

10

A facile synthesis of stable dihydroindolizines via intramolecular 1,5-cyclization of ylides

Journal:

Tetrahedron Letters

Year:

1972

Language:

english

File:

PDF, 186 KB

english, 1972

11

Timolol derivatives. I. X-ray, NMR and theoretical studies of the crystallization of (S)-timolol O,O-diacetyl-l-tartaric acid monoester

Jussi Kivikoski, Jouko Vepsäläinen, Reijo Suontamo, Esko Pohjala, Reino Laatikainen

Journal:

Tetrahedron: Asymmetry

Year:

1993

Language:

english

File:

PDF, 858 KB

english, 1993

12

A 31P CP/MAS NMR Study on Dehydration of Disodium Clodronate Tetrahydrate

Juha T. Timonen, Esko Pohjala, Hannu Nikander, Tuula T. Pakkanen

Journal:

Pharmaceutical Research

Year:

1998

File:

PDF, 528 KB

1998

13

Indolizine derivatives. VII. indolizines via cyclizations of 2-(2-Pyridyl)methylene-1,3-diketones and −1,3-Keto esters

Esko K. Pohjala

Journal:

Journal of Heterocyclic Chemistry

Year:

1977

File:

PDF, 306 KB

1977

14

Indolizine derivatives. IX. Preparation of 1-acylpyrrolo[2,1,5-cd]indolizines via cycloaddition of 3-acyloxyindolizines to active ethylenes and acetylenes

Esko K. Pohjala

Journal:

Journal of Heterocyclic Chemistry

Year:

1978

File:

PDF, 266 KB

1978

15

Preparation and structure determination of 1-benzyl-, 1-methyl- and 1H-5-[(2-nitro-2-phenyl)ethenyl]imidazoles

Paula Aulaskari, Markku Ahlgrén, Juha Rouvinen, Pirjo Vainiotalo, Esko Pohjala, Jouko Vepsäläinen

Journal:

Journal of Heterocyclic Chemistry

Year:

1996

File:

PDF, 771 KB

1996

16

Structural studies on beta-blockers Part I. Structural similarities of pronethalol and propranolol

Juha Rouvinen, Pentti Mälkönen, Esko Pohjala, Jouko Vepsäläinen

Journal:

Journal of Molecular Structure: THEOCHEM

Year:

1987

Language:

english

File:

PDF, 341 KB

english, 1987

17

BISPHOSPHONIC COMPOUNDS. IV. 1 PREPARATION AND IDENTIFICATION OF MIXED TETRAALKYL METHYLENE- AND (DICHLOROMETHYLENE)-BISPHOSPHONATES BY NMR SPECTROSCOPIC, MASS SPECTROMETRIC AND X-RAY CRYSTALLOGRAPHIC STUDIES

Vepsäläinen, Jouko, Pohjala, Esko, Nupponen, Heikki, Vainiotalo, Pirjo, Ahlgren, Markku

Journal:

Phosphorus Sulfur and Silicon and the Related Elements

Year:

1992

Language:

english

File:

PDF, 1.09 MB

english, 1992

18

Bisphosphonic Compounds. II. Preparation of Monophosphonic Starting Materials. Mixed Esters of Methylphosphonic Acid

Jouko, Vepsäläinen, Heikki, Nupponen, Esko, Pohjala

Journal:

Synthetic Communications

Year:

1992

Language:

english

File:

PDF, 214 KB

english, 1992

19

Synthesis of 1-Substituted-5-[(2-nitro-2-phenyl)-ethyl]imidazoles

Aulaskari, Paula, Pohjala, Esko, Vainiotalo, Pirjo

Journal:

Synthetic Communications

Year:

1997

Language:

english

File:

PDF, 263 KB

english, 1997

20

Ab Initio Studies on Organophosphorus Compounds. 5. Interactions of Dianionic Bisphosphonate Compounds with Magnesium and Calcium

Räsänen, Jari P., Pohjala, Esko, Nikander, Hannu, Pakkanen, Tapani A.

Journal:

Journal of Physical Chemistry

Year:

1996

Language:

english

File:

PDF, 409 KB

english, 1996

21

Bisphosphonic compounds. Part 3. Preparation and identification of tetraalkyl methylene- and (?-halomethylene)bisphosphonates by mass spectrometry, NMR spectroscopy and X-ray crystallography

Veps�l�inen, Jouko, Nupponen, Heikki, Pohjala, Esko, Ahlgren, Markku, Vainiotalo, Pirjo

Journal:

Journal of the Chemical Society Perkin Transactions 2

Year:

1992

Language:

english

File:

PDF, 1.14 MB

english, 1992

22

Synthesis and Ocular Effects of Imidazole Nitrolic Acids

Oresmaa, Larisa, Kotikoski, Hanna, Haukka, Matti, Salminen, Johanna, Oksala, Olli, Pohjala, Esko, Moilanen, Eeva, Vapaatalo, Heikki, Vainiotalo, Pirjo, Aulaskari, Paula

Journal:

Journal of Medicinal Chemistry

Year:

2005

Language:

english

File:

PDF, 88 KB

english, 2005

23

Ab Initio Studies on Organophosphorus Compounds. 6. 1-5 Interactions of Dimethylphosphinic and Dimethylphosphinothioic Acid Monoanions and Methylenebisphosphonic Acid Dianion with Calcium

Räsänen, Jari P., Pohjala, Esko, Nikander, Hannu, Pakkanen, Tapani A.

Journal:

Journal of Physical Chemistry A

Year:

1997

Language:

english

File:

PDF, 194 KB

english, 1997

24

Ab initio studies on organophosphorus compounds. Part 4. Intramolecular hydrogen bonding and water interactions of bisphosphonates

R�s�nen, Jari P., Pohjala, Esko, Pakkanen, Tapani A.

Journal:

Journal of the Chemical Society Perkin Transactions 2

Year:

1996

Language:

english

File:

PDF, 1.25 MB

english, 1996

25

Ab initio studies on organophosphorus compounds. Part 2. Monoanionic methyl methylphosphonate and methyl methylphosphinate and their sulfur analogues

R�s�nen, Jari P., Per�kyl�, Mikael, Pohjala, Esko, Pakkanen, Tapani A.

Journal:

Journal of the Chemical Society Perkin Transactions 2

Year:

1994

Language:

english

File:

PDF, 657 KB

english, 1994

26

Ab initio studies on organophosphorus compounds. Part 1. Monoanionic methylphosphonate and methylphosphinate and their nitrogen and sulfur analogues

Per�kyl�, Mikael, Pakkanen, Tapani A., Bj�rkroth, Jussi-Pekka, Pohjala, Esko, Leiras, Huhtam�ki Oy

Journal:

Journal of the Chemical Society Perkin Transactions 2

Year:

1992

Language:

english

File:

PDF, 608 KB

english, 1992

27

Ab initio studies on organophosphorus compounds. Part 3. Cationic calcium binding to phosphonate and phosphinate monoanions and their sulfur analogues

R�s�nen, Jari P., Pohjala, Esko, Pakkanen, Tapani A.

Journal:

Journal of the Chemical Society Perkin Transactions 2

Year:

1994

Language:

english

File:

PDF, 808 KB

english, 1994

28

Pyrolysis of three acetates of methylbicyclo[2.2.1]heptan-2-ols and the parent alcohols

Vainiotalo, Pirjo, Pohjala, Esko, M�lk�nen, Pentti

Journal:

Journal of the Chemical Society Perkin Transactions 2

Year:

1985

Language:

english

File:

PDF, 548 KB

english, 1985

29

ChemInform Abstract: INDOLIZINE DERIVATIVES. III. CYCLIZATION OF THE ALDOL PRODUCT OF 2-PYRIDINECARBALDEHYDE AND β-DIMETHYLAMINO (OR β-HYDROXY) KETONES

Journal:

Chemischer Informationsdienst

Year:

1976

File:

PDF, 221 KB

1976

30

ChemInform Abstract: INDOLIZINE DERIVATIVES PART 1, A NOVEL ONESTEP SYNTHESIS OF PYRROLO(2,1,5-CD)INDOLIZINES, THE MECHANISM OF THE ACYLATIVE CYCLISATION OF 2-PYRIDINE-CARBALDEHYDE AND UNSATURATED CARBONYL COMPOUNDS

Journal:

Chemischer Informationsdienst

Year:

1974

File:

PDF, 122 KB

1974

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