Pak, Chwang: search on Z-Library

The world's largest scientific articles store. 70,000,000+ articles for free.

Don't use scam websites

1

Magnesium-methanol as a simple convenient reducing agent for α,β -unsaturated esters

In Kwon Youn, Gyu Hwan Yon, Chwang Siek Pak

Journal:

Tetrahedron Letters

Year:

1986

Language:

english

File:

PDF, 135 KB

english, 1986

2

The Current Status and Future Perspectives of Studies of Cannabinoid Receptor 1 Antagonists as Anti-Obesity Agents

Lee, Hyeon-Kyu, Choi, Eun, Pak, Chwang

Journal:

Current Topics in Medicinal Chemistry

Year:

2009

Language:

english

File:

PDF, 555 KB

english, 2009

3

ChemInform Abstract: Regiospecific Reductive Cleavage of the C(2)—N Bond of Aziridines Substituted with an Electron Acceptor Mediated by Mg/MeOH.

Chwang Siek Pak, Tae Hoon Kim, Sung Jin Ha

Journal:

Year:

1999

File:

PDF, 35 KB

1999

4

Selective reductions. XIX. Rapid reaction of carboxylic acids with borane-tetrahydrofuran. Remarkably convenient procedure for the selective conversion of carboxylic acids to the corresponding alcohols in the presence of other functional groups

Yoon, Nung Min, Pak, Chwang Siek, Brown Herbert C.,, Krishnamurthy, S., Stocky, Thomas P.

Journal:

Journal of Organic Chemistry

Year:

1973

Language:

english

File:

PDF, 1.05 MB

english, 1973

5

Synthesis of β-Lactam from Acyl(Arylcarbamoyl)- S,S -bis(alkylketene) Dithioacetal: Revised Structure of the Product from Thermal Cyclization of Acyl(Arylcarbamoyl)- S,S -bis(alkylketene) Dithioacetal

Choi, Eun Bok, Yon, Guy Hwan, Lee, Hyeon Kyu, Yang, Hee Cheol, Yoo, Chung Youl, Pak, Chwang Siek

Journal:

Year:

2003

Language:

english

File:

PDF, 101 KB

english, 2003

6

Prediction of aortic augmentation index using radial pulse transmission-wave analysis

Lau, Elizabeth OY, Tse, Hung-Fat, Chan, Raymond HW, Chen, Wai-Hong, Lee, Pui-Yin, Lee, Stephen WL, Chwang, Allen T, Lau, Chu-Pak

Journal:

Journal of Hypertension

Year:

2006

Language:

english

File:

PDF, 167 KB

english, 2006

7

ChemInform Abstract: Facile Synthesis of Amidines from Thioamides.

Hyeon Kyu Lee, Leonid N. Ten, Chwang Siek Pak

Journal:

Year:

1999

File:

PDF, 25 KB

1999

8

ChemInform Abstract: Reaction of Thioamides with Zinc Enolate: Synthesis of Vinylogous Carbamates.

Hyeon Kyu Lee, Jia Kim, Chwang Siek Pak

Journal:

Year:

1999

File:

PDF, 29 KB

1999

9

ChemInform Abstract: Intramolecular Ketyl-Olefin Cyclization Mediated by Magnesium Metal.

Ge Hyeong Lee, Sung Jin Ha, In Kwon Yoon, Chwang Siek Pak

Journal:

Year:

1999

File:

PDF, 31 KB

1999

10

ChemInform Abstract: Synthesis of 2-Methylthio-4H-4-chromenones via Ketene Dithioacetal in the One-Pot Reaction.

Ge Hyeong Lee, Chwang Siek Pak

Journal:

Year:

1999

File:

PDF, 28 KB

1999

11

ChemInform Abstract: Synthesis and Characterization of 2-Methylsulfonyl-4H-4-chromenones.

Ge Hyeong Lee, Sung Jin Ha, Chwang Siek Pak

Journal:

Year:

1999

File:

PDF, 31 KB

1999

12

ChemInform Abstract: Total Synthesis of (R)-(-)-Sulcatol, (2R)-6-Methyl-5-hepten-2-ol.

Ge Hyeong Lee, Chwang Siek Pak

Journal:

Year:

1999

File:

PDF, 28 KB

1999

13

ChemInform Abstract: Reaction of Thionolactones with Zinc Enolate: New Synthesis of Vinylogous Carbonates.

Hyeon Kyu Lee, Jia Kim, Chwang Siek Pak

Journal:

Year:

1999

File:

PDF, 29 KB

1999

14

ChemInform Abstract: Reaction of 2-Methylsulfonyl-4H-4-chromenones with Nucleophiles.

Ge Hyeong Lee, Sung Jin Ha, Chwang Siek Pak

Journal:

Year:

1999

File:

PDF, 29 KB

1999

15

ChemInform Abstract: Ring Opening of 5-(Bromomethyl)-2-isoxazolines with Magnesium Metal in Absolute MeOH.

Sung Jin Ha, Ge Hyeong Lee, In Kwon Yoon, Chwang Siek Pak

Journal:

Year:

1999

File:

PDF, 34 KB

1999

16

ChemInform Abstract: Tandem in situ Generation of Azomethine Ylides and Nitroethylene: Synthesis of 3-Unsubstituted-4-nitro-pyrrolidines.

Chwang Siek Pak, Miklos Nyerges

Journal:

Year:

1999

File:

PDF, 26 KB

1999

17

ChemInform Abstract: A New Synthesis of Pyrrole-2-carboxylic Acids.

Chwang Siek Pak, Miklos Nyerges

Journal:

Year:

1999

File:

PDF, 28 KB

1999

18

ChemInform Abstract: Tandem in situ Generation of Azomethine Ylides and Base Sensitive Nitroethylene Dipolarophiles.

Imre Fejes, Laszlo Toke, Miklos Nyerges, Chwang Siek Pak

Journal:

Year:

2000

File:

PDF, 34 KB

2000

19

ChemInform Abstract: A New Synthesis of 3,5-Diaryl-pyrrole-2-carboxylic Acids and Esters.

Imre Fejes, Laszlo Toke, Gabor Blasko, Miklos Nyerges, Chwang Siek Pak

Journal:

Year:

2001

File:

PDF, 35 KB

2001

20

ChemInform Abstract: Preparation of 2H-Thietimines from the Reaction of 4-Dialkylamino-3-butyn-2-one with Aryl Isothiocyanates.

Chung Youl Yoo, Eun Bok Choi, Chwang Siek Pak

Journal:

Year:

2001

File:

PDF, 29 KB

2001

21

ChemInform Abstract: Facile Transformation of 3,4-Disubstituted 2-Azetidinones to Chiral 5,6-Dihydro-2-pyridones.

Hyeon Kyu Lee, Jong Soo Chun, Chwang Siek Pak

Journal:

Year:

2001

File:

PDF, 33 KB

2001

22

ChemInform Abstract: Deprotection of 2-Pyridyl Sulfonyl Group from Pyridine-2-sulfonamides by Magnesium in Methanol.

Chwang Siek Pak, Dong Sung Lim

Journal:

Year:

2001

File:

PDF, 27 KB

2001

23

ChemInform Abstract: Synthesis of 5-Imino-1,2,4-oxadiazolidin-3-one.

Ge Hyeong Lee, Hyo Won Lee, Chwang Siek Pak

Journal:

Year:

2002

File:

PDF, 28 KB

2002

24

Facile Transformation of 2-Azetidinones to Unsaturated Ketones: Application to the Formal Synthesis of Sphingosine and Phytosphingosine.

Hyeon Kyu Lee, Eun-Kyung Kim, Chwang Siek Pak

Journal:

Year:

2003

File:

PDF, 168 KB

2003

25

Isothiazole Ring Formation with Substituted 2-Alkylthio-3-acyl-4-quinolinone Using O-(Mesitylenesulfonyl)hydroxylamine (MSH).

Jong Hee Choi, Eun Bok Choi, Chwang Siek Pak

Journal:

Year:

2003

File:

PDF, 261 KB

2003

26

Facile Conversion of 2-Azetidinones to 2-Piperidones: Application to a Formal Synthesis of Prosopis and Cassia Alkaloids.

Hyeon Kyu Lee, Jong Soo Chun, Chwang Siek Pak

Journal:

Year:

2003

File:

PDF, 167 KB

2003

27

Synthesis of β-Lactam from Acyl(arylcarbamoyl)-S,S-bis(alkylketene) Dithioacetal: Revised Structure of the Product from Thermal Cyclization of Acyl(arylcarbamoyl)-S,S-bis(alkylketene) Dithioacetal.

Eun Bok Choi, Guy Hwan Yon, Hyeon Kyu Lee, Hee Cheol Yang, Chung Youl Yoo, Chwang Siek Pak

Journal:

Year:

2004

File:

PDF, 106 KB

2004

28

Efficient Synthesis of Arylsulfamides by Reaction of Amines with Arylsulfamoyl Imidazolium Triflate.

Hyeon Kyu Lee, Miyeon Bang, Chwang Siek Pak

Journal:

Year:

2006

File:

PDF, 27 KB

2006

29

ChemInform Abstract: Synthesis of Enantiopure γ-Glutamic Acid Functionalized Peptide Nucleic Acid Monomers.

Hu Huang, Goon Ho Joe, Sung Rok Choi, Su Nam Kim, Yong Tae Kim, Chwang Siek Pak, Joon Hee Hong, Wonjae Lee

Journal:

Year:

2010

File:

PDF, 28 KB

2010

30

An efficient desulfonylation method mediated by magnesium in ethanol

Ge Hyeong Lee, Eun Bok Choi, Eun Lee, Chwang Siek Pak

Journal:

Tetrahedron Letters

Year:

1993

Language:

english

File:

PDF, 167 KB

english, 1993

31

An efficient Julia olefination mediated by magnesium in ethanol

Ge Hyeong Lee, Hyeon Kyu Lee, Eun Bok Choi, Bum Tae Kim, Chwang Siek Pak

Journal:

Tetrahedron Letters

Year:

1995

Language:

english

File:

PDF, 122 KB

english, 1995

32

PTP-1B inhibitors: Cyclopenta[d][1,2]-oxazine derivatives

Sung Yun Cho, Ji Yoen Baek, Sang Sub Han, Seung Kyu Kang, Jae Du Ha, Jin Hee Ahn, Jae Don Lee, Kwang Rok Kim, Hyae Gyeong Cheon, Sang Dal Rhee, Sung Don Yang, Gyu Hwan Yon, Chwang Siek Pak, Joong-Kwon

Journal:

Bioorganic & Medicinal Chemistry Letters

Year:

2006

Language:

english

File:

PDF, 115 KB

english, 2006

33

A methodology for the synthesis of highly functionalized 2- and 4-aminoquinoline derivatives

Bo Hyun Hwang, Sung Hee Park, Eun Bok Choi, Chwang Siek Pak, Hyeon Kyu Lee

Journal:

Year:

2008

Language:

english

File:

PDF, 309 KB

english, 2008

34

Efficient synthesis of arylsulfamides by reaction of amines with arylsulfamoyl imidazolium triflate

Hyeon Kyu Lee, Miyeon Bang, Chwang Siek Pak

Journal:

Tetrahedron Letters

Year:

2005

Language:

english

File:

PDF, 119 KB

english, 2005

35

The octant rule. XVI1. COnformation and circular dichroism of syn and anti 2-methylbicyclo[3.1.0]hexan-3-ones, thujone and isothujone

David A. Lightner, Chwang Siek Pak, B.Vincent Crist, Stephen L. Rodgers, John W. Givens III

Journal:

Year:

1985

Language:

english

File:

PDF, 877 KB

english, 1985

36

Facile conversion of 2-azetidinones to 2-piperidones: application to a formal synthesis of Prosopis and Cassia alkaloids

Hyeon Kyu Lee, Jong Soo Chun, Chwang Siek Pak

Journal:

Year:

2003

Language:

english

File:

PDF, 249 KB

english, 2003

37

An efficient deoxygenation of 1-alkenyl or alkyl phenyl sulfoxides to the corresponding sulfides mediated by magnesium in alcohol

Ge Hyeong Lee, Eun Bok Choi, Eun Lee, Chwang Siek Pak

Journal:

Tetrahedron Letters

Year:

1994

Language:

english

File:

PDF, 193 KB

english, 1994

38

Facile transformation of 3,4-disubstituted 2-azetidinones to chiral 5,6-dihydro-2-pyridones

Hyeon Kyu Lee, Jong Soo Chun, Chwang Siek Pak

Journal:

Tetrahedron Letters

Year:

2001

Language:

english

File:

PDF, 66 KB

english, 2001

39

Optical rotatory dispersion studies CXXVI. Synthesis and chiroptical properties of cyclohexanones with chirality solely due to isotopic substitution: 12CH3 vs. 13CH3 and CH3 vs. CD3

Chwang Siek Pak, Carl Djerassi

Journal:

Tetrahedron Letters

Year:

1978

Language:

english

File:

PDF, 136 KB

english, 1978

40

Facile transformation of 2-azetidinones to unsaturated ketones: application to the formal synthesis of sphingosine and phytosphingosine

Hyeon Kyu Lee, Eun-Kyung Kim, Chwang Siek Pak

Journal:

Tetrahedron Letters

Year:

2002

Language:

english

File:

PDF, 149 KB

english, 2002

41

Reaction of thioamides with zinc enolate: Synthesis of vinylogous carbamates

Hyeon Kyu Lee, Jia Kim, Chwang Siek Pak

Journal:

Tetrahedron Letters

Year:

1999

Language:

english

File:

PDF, 140 KB

english, 1999

42

Intramolecular ketyl-olefin cyclization mediated by magnesium metal

Ge Hyeong Lee, Sung Jin Ha, In Kwon Yoon, Chwang Siek Pak

Journal:

Tetrahedron Letters

Year:

1999

Language:

english

File:

PDF, 250 KB

english, 1999

43

Reaction of thionolactones with zinc enolate: new synthesis of vinylogous carbonates

Hyeon Kyu Lee, Jia Kim, Chwang Siek Pak

Journal:

Tetrahedron Letters

Year:

1999

Language:

english

File:

PDF, 225 KB

english, 1999

44

A New Synthesis of 3,5-Diaryl-pyrrole-2-carboxylic Acids and Esters

Imre Fejes, László Tőke, Gábor Blaskó, Miklós Nyerges, Chwang Siek Pak

Journal:

Year:

2000

Language:

english

File:

PDF, 172 KB

english, 2000

45

Tandem in situ Generation of Azomethine Ylides and Base Sensitive Nitroethylene Dipolarophiles

Imre Fejes, László Tőke, Miklós Nyerges, Chwang Siek Pak

Journal:

Year:

2000

Language:

english

File:

PDF, 168 KB

english, 2000

46

An efficient method for hydroazulenone from bicyclo[3.3.0]octanone via two carbon annulation

Chwang Siek Pak, Sung Kee Kim, Hyeon Kyu Lee

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 246 KB

english, 1991

47

Asymmetric borane reduction of ketones catalyzed by oxazaborolidine

In Kwon Youn, Sang Who Lee, Chwang Siek Pak

Journal:

Tetrahedron Letters

Year:

1988

Language:

english

File:

PDF, 232 KB

english, 1988

48

Identification of 3-Acetyl-2-aminoquinolin-4-one as a Novel, Nonpeptidic Scaffold for Specific Calpain Inhibitory Activity

Kang, Da-Hye, Jun, Kyu-Yeon, Lee, Jin Pyo, Pak, Chwang Siek, Na, Younghwa, Kwon, Youngjoo

Journal:

Journal of Medicinal Chemistry

Year:

2009

Language:

english

File:

PDF, 283 KB

english, 2009

49

Reductive Cyclization of Ketones Tethered to Activated Olefins Mediated by Magnesium in Methanol

Lee, Ge Hyeong, Choi, Eun Bok, Lee, Eun, Pak, Chwang Siek

Journal:

Journal of Organic Chemistry

Year:

1994

Language:

english

File:

PDF, 4.88 MB

english, 1994

50

A convenient regioselective synthesis of substituted cycloheptenones

Pak, Chwang Siek, Kim, Sung Kee

Journal:

Journal of Organic Chemistry

Year:

1990

Language:

english

File:

PDF, 631 KB

english, 1990