• Archives of Pharmacal Research
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• 제13권4호
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• pp.347-350
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• 1990

The hydrazine derivative 2 has been utilized for the synthesis of three different fused 1, 2, 4-triazolo [4, 3-a] pyrimidine derivatives 4, 5, &6 and a tetrazolo [1, 5-a] pyrimidine derivative 7. Reaction of 2 with the chalcone analogue 2-thenylidene-2'-acetothienone, gave the pyrazoline derivative 8.

• Archives of Pharmacal Research
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• 제17권6호
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• pp.411-414
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• 1994

Phenylazocyanothioacetamide 1 reacts with malononitrile to afford the pyridinethione 4 which reacts with phenacylbromide to yield the pyridine-S-phenacyl derivative 6, 1 reacts with ethyl cyanoacetate to yield the pyridazine derivative, 8, and with phenacyl bromide to afford the N-phenacyl derivative 11, instead of the thiazole 10. Compound 11 afforded the pyrazolopyridine 13 on reaction with malononitrile while 10 was obtained on coupling of the thiazole 14 with diazotised aniline. Compound 10 reacts with malononitrile to afford the thizaolyl pyridazine 15. Compound 1 reacts with malononitrile dimer to afford the pyriodopyridazine derivative 17a. 1 reacts also with active methylene heterocycies to afford the pyrazolo and thiazolo-fused phridazines 20 and 23 respectively.

• Archives of Pharmacal Research
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• 제21권6호
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• pp.723-728
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• 1998

The chemical behaviours of 4-methyl-2-oxo-2H-benzopyran-7-yl oxoacetyl hydrazine (2) towards some different reagents such as anhydride compounds, aromatic aldehydes, carb on disulphide, and nitrous acid yielded the corresponding pathalazine derivatives (3, 4, 5), hydrazone derivative (6), 1,3,4-oxadiazole derivative (7, 8, 9) and acid azide (10) respectively. Treatmen of 10 with absolute alcohols, amines and ethyl amino acid ester gave the corresponding carbamate derivative (11), substituted urea derivative (12) and ethyl substituted alkyl acetate (13) respectively. The biological activity of some synthesized compounds was evaluated.

• KSTLE International Journal
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• 제7권1호
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• pp.18-21
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• 2006

The electrorheology of hollow PANI derivative suspensions in silicone oil was investigated by varying the electric fields and shear rates, respectively. The hollow PANI derivative susepnsions showed a typical electrorheological (ER) response caused by the polarizability of an amide polar group and shear yield stress due to the formation of chains upon application of an electric field. The shear stress for the hollow PANI succinate suspension exhibited an electric field power of 0.67. On the basis of the experimental results, the newly synthesized hollow PANI derivative suspensions were found to be an anhydrous ER fluid.

• Bulletin of the Korean Chemical Society
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• 제33권8호
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• pp.2647-2650
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• 2012

The total synthesis of biologically interesting ${\beta}$-hydroxypyranochalcones, purpurenone (1), its derivative 2, praecansone B (3), and pongapinone A (4) has been accomplished starting from commercially available 2,4-dihydroxyacetophenone or 6-methoxy-2,4-dihydroxyacetophenone in 3 steps by a convergent strategy through benzopyran formations, O-methylations, and coupling reactions.

• 약학회지
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• 제43권3호
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• pp.328-333
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• 1999

In order to develop selective and competitive and competitive antagonist at the $P2Y_1$ receptor a carbocyclic oxetanocin bisphosphate derivative (7) was synthesized as a bioisostere of the lead, MRS 2179. The synthesis was started from ketene diethylacetal (1) and completed in 6 steps.

• 대한화학회지
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• 제41권4호
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• pp.210-213
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• 1997

• Bulletin of the Korean Chemical Society
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• 제20권4호
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• pp.456-458
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• 1999

The synthesis of 6-amino-3-benzylpyrrolo[2,3-c]acridine (9) and its 8,9-dimethoxy derivative (10) from N-benzyl-4,5,6,7-tetrahydroindol-4-one and anthranilonitriles, via imine formation followed by cyclization and aromatisation, is described.

• 농약과학회지
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• 제9권3호
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• pp.185-190
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• 2005

최초의 침투이행성 농약 살균제, 카르복신 1의 유도체인 16을 고체상에서 합성하였다. 1,3-옥사티올란 유도체를 아실화 반응성을 갖고 있는 4-하이드록시-3-나이트로벤조페논 고체상 6에 연결하여 9를 82%의 수율로 합성하였다. 고체상의 1,3-옥사티올란 9의 황원자를 MCPBA로 산화한 다음 생성된 설폭사이드 10을 산촉매 존재하에서 환팽창하여 상응하는 고체상에 연결된 다이하이드로-1,4-옥사티인 유도체 12를 합성하였다. 고체상의 1,3-옥사티올란 9의 산화물을 p-메톡시아닐린과 반응시켜 1,3-옥사티올란 14, 1,3-옥사티올란 설폰 15, 다이하이드로-1,4-옥사티인 16, 그리고 아세토아세트아닐라이드 유도체 17을 각각 41%, 35%, 14%, 10% 수율로 얻었다.

• Bulletin of the Korean Chemical Society
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• 제24권4호
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• pp.460-466
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• 2003

For the drug master file (DMF) of ketoconazole, four impurities (1-4) contained in ketoconazole were synthesized. During the synthesis of 2, a new synthetic method of 1,4-dihydropyrazine was established. To oxidize the aminoalcohol (2j) to the aminal (2j-1), the standard Swern oxidation condition was modified to mask the nucleophilicity of the amino group temporarily using one equivalent of acetic acid. Derivative 3 was synthesized via regioselective bromination at the 2 position of the 4-aminophenol derivative (3a) using $Br_2$ in the presence of p-TsOH. The etherification of aryl bromide with the phenol derivative (1f) was accomplished by a modification of the general Cu-mediated reaction condition using excess 1f itself as a solvent at elevated temperature (190 ℃).