• 약학회지
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• 제35권4호
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• pp.335-340
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• 1991

The synthetic product of 1-hydroxymethyl-p-mentha-8-ene-2-one was afforded by the reaction between dihydrocarvone and formaldehyde. This reaction involves the aldol condensation. The preferential position of formaldehyde is methyl substituted .alpha.-carbon atom where these enols are regiospecifically formed. The hydroxymethylation of dihydrocarvone was also proved to happen regiospecifically in the position of .alpha.-methyl substituted ketone. When 1-hydroxymethyl-p-mentha-8-ene-2-one reacted with LiAIH$_{4}$, 1-hydroxymethyl-p-mentha-8-ene-2$\beta$-ol obtained. 1-Hydroxymethyl-p-mentha-8-ene-2-one reacted with PDC and chromic acid to give 1-formyl-p-mentha-8-ene-2-one and 1-carboxy-p-mentha-8-ene-2-one. When the hydroxymethyl group of 1-hydroxymethyl-p-menta-8-ene-2-one was reducted to methyl group, 1-methyl-p-menta-8-ene-2-one was obtained. Some of these new compound have certain odor. I, II have woody aroma and IV, V have camphory odors. IX has flowery minty odor.

• Bulletin of the Korean Chemical Society
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• 제26권3호
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• pp.488-492
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• 2005

• 공업화학
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• 제17권5호
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• pp.498-503
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• 2006

윤활유 첨가제 중간체로서 Alkenyl Succinic Anhydride (ASA)계열인 i-(2',5'-diketotetrahydrofuranyl)octadacenyl acid (OSA)를 oleic acid (OA)와 maleic anhydride (MA)의 ene-reaction을 통하여 합성하였다. 이 반응의 진행과정은 GC분석을 통해 관찰함으로써 확인하였다. 숙신이미드 화합물은 알킬아민과 OSA와의 반응에 의해 합성되었다. 이 숙신이미드 화합물들은 윤활유 첨가제로서 항유화성, 내마모성, 방청성능 등을 시험하였으며, 이때 상대적으로 긴 알킬사슬을 가진 octadecylamine 유도체가 우수한 물성을 나타내었다.

• 폴리머
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• 제34권5호
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• pp.469-473
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• 2010

광경화성 수지인 아크릴레이트의 경화 특성과 메카니즘에 대하여 Photo-DSC와 FTIR, Raman spectrometer를 이용하여 조사하였다. 아크릴레이트 종류, 관능기 수, 광 세기 등에 따른 경화 속도에 관한 정보는 시간에 따른 Photo-DSC curve에서 계산하였고, FTIR과 Raman을 이용하여 경화 반응의 전환율과 반응 메카니즘을 조사하였다. 광경화 반응에서 산소의 영향을 알아보기 위하여 아크릴레이트 수지와 thiol-ene 수지의 경화과정을 비교하였는데, 공기 중 산소가 아크릴레이트의 라디칼 반응에서 금지제로 작용하여 아크릴레이트 수지는 80% 이하의 전환율을 보인 반면 thiol-ene 수지는 산소가 반응에 영향을 미치지 않는 것을 알 수 있었다.

• Macromolecular Research
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• 제17권10호
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• pp.739-745
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• 2009

N,N'-(bicyclo[2,2,2]oct-7-ene-tetracarboxylic)-bis-L-amino acids 3a-g were synthesized by the condensation reaction of bicyclo[2,2,2]oct-7-ene-2,3,5,6-tetracarboxylic dianhydride 1 with two equimolars of Lalanine 2a, L-valine 2b, L-leucine 2c, L-isoleucine 2d, L-phenyl alanine 2e, L-2-aminobutyric acid 2f and L-histidine 2g in an acetic acid solution. Seven new poly(amide-imide)s PAIs 5a-g were synthesized through the direct polycondensation reaction of seven chiral N,N'-(bicyclo[2,2,2]oct-7-ene-tetracarboxylic)-bis-L-amino acids 3a-g with bis(3-amino phenyl) phenyl phosphine oxide 4 by two different methods: direct polycondensation in a medium consisting of N-methyl-2-pyrrolidone (NMP)/triphenyl phosphite (TPP)/calcium chloride ($CaCl_2$/pyridine (py), and direct polycondensation in a tosyl chloride (TsCl)/pyridine (py)/N,N-dimethylformamide (DMF) system. The polymerization reaction produced a series of flame-retardant and thermally stable poly(amide-imide)s 5a-g with high yield. The resulted polymers were fully characterized by FTIR, $^1H$ NMR spectroscopy, elemental analyses, inherent viscosity, specific rotation and solubility tests. Data obtained by thermal analysis (TGA and DTG) revealed that the good thermal stability of these polymers. These polymers can be potentially utilized in flame retardant thermoplastic materials.

• 대한화학회지
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• 제36권4호
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• pp.579-583
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• 1992

5-Bromo-2-methylpent-2-ene(2)을 출발물질로하여 farnesol인 (2E, 6E)-3,7,11-trimethyldodeca-2,6,10-trien-1-ol(1)의 입체 선택적 합성을 수행하였다. 5-Bromo-2-methylpent-2-ene(2)을 요오드화시킨 후, 5-lithio-2,3-dihydrofuran과 반응시켜 5-(4-methylpent-3-enyl)-2,3-dihydrofuran(4)을 얻었다. Dihydrofuran 4를 MeMgI와 Ni(O)-촉매 짝지음 반응시켜 (3E)-4,8-dimethylnona-3,7-dien-1-ol(5)을 72%의 수율로 얻었다. 알릴알코올 5를 4단계로 거쳐 (5E)-6,10-dimethylundeca-5,9-dien-2-one(8)으로 변환시켰다. 화합물 8을 벤젠 용매하에서 dimethylmethoxycarbonylmethylphosponate와 반응시킨 다음, 에탄올 용매하에서 $NaBH_4$로 환원시켜서 (2E, 6E)-3,7,11-trimethyldodeca-2,6,10-tiren-1-ol(1)을 얻었다. Dihydrofuran 4와 MeMgI와의 Ni(O)-촉매 짝지음 반응이 본 연구의 farnsol(1)의 합성에서 중요한 단계이다.

• 대한화학회지
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• 제55권5호
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• pp.808-811
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• 2011

A new catalytic system has been developed in the synthesis of 2-amino-5-nitro-4,6-diarylcyclohex-1-ene-1,3,3-tricarbonitriles using carbonate on polymer support (Amberlyst A-26 $NaCO_3{^-}$). Short reaction time, simplicity of isolation, safe catalyst and high yields of product are the features.

• 한국산학기술학회:학술대회논문집
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• 한국산학기술학회 2004년도 추계학술대회
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• pp.265-268
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• 2004

Methyl methacrlate와 cyclopentadiene을 반응하여 Methyl 5-methylbicyclo(2.2.1)hept-2-ene-5-carboxylate(MMBHC)를 합성코자 하였다. 합성된 MMBHC의 온도, solvent 변화와 촉매($AlCl_3$)의 사용 유무에 따른 endo, exe의 비율을 관찰하였다. 온도가 낮은 경우 온도가 높은 쪽 보다 endo 비율이 높았고 촉매($AlCl_3$)를 사용하였을 때(약 endo : exo = 63 : 37) 촉매를 사용하지 않은 반응(endo : exe = 34 : 66)보다 endo의 비율이 높았다. methyl acrylate를 사용한 경우 같은 조건에서 endo : exe의 비율이 93.5 : 6.5로 MMA를 사용한 경우보다 endo의 비율은 좋았다. 온도가 높은 경우 수율은 좋았지만 exe의 비율이 높았고 solvent에 따라 endo, exe의 선택도는 큰 차이를 보이지 않음을 알 수 있었다.

• Bulletin of the Korean Chemical Society
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• 제31권3호
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• pp.539-540
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• 2010

• Bulletin of the Korean Chemical Society
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• 제25권6호
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• pp.889-894
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• 2004

Polyaddition reactions of 1,1-diethynyl-3-triethylsilyl-1-silacyclopent-3-ene with several organoborane derivatives have afforded the oligomeric materials containing organosilacyclic group and organoboron moiety along the oligomer main chains. All of these materials are soluble in THF as well as chloroform, and their molecular weights are in the range of 1,990/1,190-21,950/7,050 ($M_w/M_n$) with the polydispersity indexes of 1.67-3.43. The prepared oligomers are characterized by several spectroscopic methods such as $^1H,\;^{13}C, \;^{29}Si,\;^{11}B$ NMR and FTIR spectra along with elemental analysis. FTIR spectra of all the oligomers show that the new strong C=C stretching frequencies appear at 1599-1712 $cm^{-1}$, in particular. The UV-vis absorption spectra of the materials in THF solution exhibit the strong absorption bands at the ${\lambda}_{max}$ of 268-275 nm. The oligomeric materials show that the strong excitation peaks appear at the ${\lambda}_{max}$ of 255-279 nm and the strong fluorescence emission bands at the ${\lambda}_{max}$ of 306-370 nm. All the spectroscopic data suggest that the obtained materials contain both the organoboron ${\pi}$-conjugation moiety of C=C-B-C=C and the organosilacyclic group of 3-triethylsilyl-1-silacyclopent-3-ene along the oligomer main chains. The oligomers are thermally stable up to 162-200 $^{\circ}C$ under nitrogen.