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아드리아마이신의 유사제제 합성 (1) -안트라싸이클리논의 Isostere로서 Tetrahydrobenzo(b)phenazine 유도체의 합성-
장영동(Yurng Dong Jahng),장선영(Sun Young Chang) 대한약학회 1990 약학회지 Vol.34 No.4
7,8-Dihydro-6,11-dihydroxy-9(1OH)benzo(b)phenazinone was prepared from 1,2,3,4-tetra-hydrophenazine as a potential isostere of anthracyclinone. The attempts to functionalize at C9 were not successful due to the unstability of the above ketone.
Jahng, Yurng-Dong,Kim, Jin-Il The Pharmaceutical Society of Korea 1994 Archives of Pharmacal Research Vol.17 No.2
trans-Ethyl 1, 2, 3, 4a, 5, 6, 8a-cotahydro-2-benzyl-4-hydroxy-6-methyl-5-isoquinoline-carboxylate was prepared by intramolecular Diels-Alder reaction as a precusor of newly designed aza-analogue of mevinolin.
Acetate-Promoted Aldol-Type Reaction: Scope and Reactivity of Acetates and Aldehydes
Kim, Dong-Hyeon,Rahman, A. F. M. Motiur,Jeong, Byeong-Seon,Lee, Eung-Seok,Jahng, Yurng-dong Korean Chemical Society 2009 Bulletin of the Korean Chemical Society Vol.30 No.4
Potential of acetates and related compounds in glacial acetic acid as a catalyst for aldol-type condensation reactions was examined. Reactions of cycloalkanones or selected heteroaromatics with aldehydes in presence of 10 mol% of various acetates in acetic acid afforded ${\alpha},{\alpha}$'-bis(substituted-benzylidene)cycloalkanones and substituted-benzylidene-mackinazolinones, respectively, in good yields. Among the compounds tested, ammonium acetate is the best and effective especially towards the reactions of mackinazolinone and aliphatic aldehydes to afford 6-alkylidenemackinazolinones.
The reaction of (E)-2, 4-pentadienoic acid with aqueous bromine re-evaluation of the product
Jahng, Yurng-Dong,Kim, Jin-Il The Pharmaceutical Society of Korea 1989 Archives of Pharmacal Research Vol.12 No.3
The reaction of (E)-2, 4-pentadienoic acid with aqueous bromine was reinvestigated to affirm the formation of (E)-5-bromo-4-hydroxy-2-pentenoic acid, whose structure was confirmed by the spectroscopic methods as well as the chemical modification.
Properties of Ruthenium(Ⅱ) Complexes of 2, 2':6', 2""-Terpyridine-Related Systems
Jahng, Yurng Dong,Seoh, Byeong Chon 영남대학교 자원문제연구소 1990 資源問題硏究 Vol.9 No.-
The first unsymmetric terpyridine related ligand, 2-(2-pyridyl)-1, 10-phenanthroline(le), was prepared from 1, 10-phenanthroline in 5 steps, and converted to Ru(le)₂(PF6)₂. The redox potentials of this complex were determined to show a similiarity to those of Ru(phen)₃(원문참조), not those of Ru(tpy )₂(원문참조). The redox properties of the ruthenium complexes of 3, 3' ; 5', 3"bis-(polymethylene)-bridged 2, 2' ; 6', 2"-terpyridine (1b-d ) were also determined to show a sensitive probe of the conjugative interaction dependent on the relationship of the 2, 2' ; 6', 2"-terpyridine about the ruthenium atom. Although Ru(Ⅱ) complexes of the ligand, 1b-d. did not show any observable emission at room temperature, Ru(le)₂ shows one absorption maximum at 595 nm in aq. EtOH solution.