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김재홍,윤기범,박평원,김영진,전경민,김영태,김중환,곽호,구상완,송민석,유옥,지혜구,김동원,문상은,박영립,정승호,성범진,성순제,엄주용,황정열,이기홍,이주협,전태진 대한화학요법학회 1994 대한화학요법학회지 Vol.12 No.1
The prevalence of PPNG among pretreated gonorrhea cases isolated at the STD clinic of Choong-Ku Public Health Center in Seoul has been studied and reported annually since 1981. In 1991, 123 strains of N.gonorrhoeae were isolated, among which 58(47.1%) were PPNG. In 1992, 98 starains of N.gonorrhoeae were isolated, among which 51(52.0%) were PPNG. In all, 109(49.3%) strains were found to be PPNG among 221 strains isolated between 1991-1992. The prevalence of PPNG in Seoul showed increased tendency till 1989, thereafter, it has been stationary or slightly decreasing.
Sang-Hyeup Lee,이병세 대한화학회 2009 Bulletin of the Korean Chemical Society Vol.30 No.3
The ytterbium catalyst immobilized on the cross-linked poly(4-vinylpyridine/styrene) copolymer (P/S-Yb) was applied in the Mannich-type, three component one-pot synthesis of β-aminoketones. This catalytic system showed excellent catalytic activity and selectivity which resulted in the exclusive formation of β-aminoketone. The applicability of this immobilized catalyst system was shown by the reusability test and again highlighted by the synthesis of a β-aminoketone library using a broad range of substrates.
Lee, Sang-Hyeup,Lee, Byoung-Se Korean Chemical Society 2009 Bulletin of the Korean Chemical Society Vol.30 No.3
The ytterbium catalyst immobilized on the cross-linked poly(4-vinylpyridine/styrene) copolymer (P/S-Yb) was applied in the Mannich-type, three component one-pot synthesis of $\beta$-aminoketones. This catalytic system showed excellent catalytic activity and selectivity which resulted in the exclusive formation of $\beta$-aminoketone. The applicability of this immobilized catalyst system was shown by the reusability test and again highlighted by the synthesis of a $\beta$-aminoketone library using a broad range of substrates.
Lee, Sang-Hyeup,Kadam, Santosh T. Korean Chemical Society 2011 Bulletin of the Korean Chemical Society Vol.32 No.10
Bismuth tribromide ($BiBr_3$) catalyzed Mannich-type reactions of N-acyliminium ions which generated in situ from N-benzyloxycarbonylamino p-tolylsulfones have been developed. In the presence of catalytic amount of $BiBr_3$, N-benzyloxycarbonylamino p-tolylsulfones prepared from aromatic and aliphatic aldehydes reacted with silyl enol ether and silyl enol ester under mild reaction conditions to afford N-Cbz-protected ${\beta}$-amino ketones and N-Cbz-protected ${\beta}$-amino esters in moderate to good yield, respectively.
이상협 ( Sang Hyeup Lee ),( Balaji L. Korbad ) 대구가톨릭대학교 자연과학연구소 2012 자연과학연구논문집 Vol.10 No.1
Natural quorum sensing molecules and related structural analogues is of significant biological interest in the development of methods to manipulatebacterial quorum sensing systems in a useful manner. therefore, here we report synthesis of N-sulphonated and acylated homoserine lactone derivatives. Many of these molecules are synthesized based around the structures of known, native bacterial auto-inducers. And these molecules will be tested for quorum sensing activity.
이상근(Sang-Keun Lee),이동욱(Dong-Wook Lee),문경수(Kyung-Su Moon),박중협(Jung-Hyeup Park),전병준(Byung Joon Chun),송현직(Hyun-Jig Song),이광식(Kwang-Sik Lee) 한국조명·전기설비학회 2000 한국조명·전기설비학회 학술대회논문집 Vol.2000 No.-
In this paper, a plate type ozonizer has been designed and manufactured to minimize the size of ozonizer. This ozonizer have following benefits : ① convenience of shift and installation ② maximize space utility. Therefore, ozone generation characteristics have been investigated by varying flow rate, supplied power and gap spacing of plate electrodes.
이상협 ( Sang Hyeup Lee ) 대구가톨릭대학교 자연과학연구소 2009 자연과학연구논문집 Vol.7 No.1
The condensation of aliphatic and aromatic aldehydes with malonic acid in the presence of ammonium formate as nitrogen source resulted racemic b-amino acids in good yields.
이지훈 ( Ji-hoon Lee ),이상협 ( Sang-hyeup Lee ) 대구가톨릭대학교 자연과학연구소 2019 자연과학연구논문집 Vol.17 No.1
A series of N-(4-(2-(2-(2-(2 -mercaptoethoxy)ethoxy)ethoxy)ethoxy)phenyl)-2-((4- phenyl - 5 - (pyridin - 2 - y 1) - 4H -1,2,4 - triazol - 3 - y 1) thio) acetamideand their analogues were synthesized.