PARTE EXPERIMENTAL(t, 1H, J 8,9 Hz, H-5), 4,60 (m, 1H, H-3), 5,05 (q, 1H, J 6,3 Hz, H-3’), 5,35(m, 2H, H-7’ e H-8’), 6,65 (t, NH, J 7,9 Hz, largo).RMN <strong>de</strong> 13 C (75,5 MHz, CDCl 3 , TMS): δ 14,1 (C-14’); 22,6 (C-13’);26,7; 27,3; 29,6; 29,0 (C-12’ a C-9’; C-6’, com sinais sobrepostos), 24,9 (C-5’), 34,5 (C-4’), 79,9 (C-3’), 41,0 (C-2’), 31,7 (C-4), 38,1 (SCH 3 ), 49,1 (C-3), 66,0 (C-5), 169,5 (C-1’); 175,3 (C-2), 128,4 (C-8’), 131,1 (C-7’).5.4.9.4. Obtenção da (S)-N-(2E, 7Z)-tetra<strong>de</strong>cadienil-HSLA um balão <strong>de</strong> 25 mL adicionou-se 50 mg (0,124 mmol) <strong>de</strong> (S)-N-(3-mesil-(7Z))-tetra<strong>de</strong>cenoil-HSL em 6 mL <strong>de</strong> diclorometano. Em seguida,adicionou-se 55,62 μL (0,372 mmol) <strong>de</strong> DBU. O meio foi agita<strong>do</strong> atemperatura ambiente por 1 h, quan<strong>do</strong> foi adiciona<strong>do</strong> mais 55,62 μL <strong>de</strong>DBU. O meio foi refluxa<strong>do</strong> (50ºC) durante 2,5 h. Após refluxo, adicionou-se10 mL <strong>de</strong> diclorometano e o meio foi extraí<strong>do</strong> com KHSO 4 1M (3 x 10 mL),NaHCO 3 10 % (3 x 10 mL) e NaCl satura<strong>do</strong> (1 x 10 mL), seco sob MgSO 4anidro, filtra<strong>do</strong> e evapora<strong>do</strong>.14'13'12'11'10'9'8'7'6'5'4'3'2'O1'NH4 5312HOO(S)-N-(2E, 7Z)-N-tetra<strong>de</strong>cadienil-homosserina lactona. Rendimento:29,1 mg; 76%. R f 0,707 (CH 2 Cl 2 /AcEt 1/1). [α] 20 D = -12,0º (c. 0,7; MeOH).CG-EM (IE, 70 eV): m/z 307 (M +. , 1%), 236 (13 %), 206 (18%), 169 (28%),143 (54%), 102 (20%), 81 (100%), 55 (59%), 46 (100%).171
PARTE EXPERIMENTALIV (KBr): 3318, 3007, 2935, 1780, 1671, 1625, 1552, 1161, 1015, 650cm -1 .RMN <strong>de</strong> 1 H (300,0 MHz, CDCl 3 , TMS): δ 0,88 (t, 3H, J 6,2 Hz, H-14’), 1,27 (m, 8H, H-10’ a H-13’), 1,52 (q, 2H, J 7,4 Hz, H-5’), 2,03 (m, 4H,H-6’ e H-9’), 2,18 (m, 2H, H-4’), 2,18 (m, 1H, H-4), 2,84 (m, 1H, H-4), 4,29(ddd, 1H, J 12,2; 9,2 e 6,1 Hz, H-5), 4,47 (t, 1H, J 9,2 Hz, H-5), 4,63 (ddd,1H, J 12,2; 9,2 e 6,1 Hz, H-3), 5,33 (m, 2H, H-7’ e H-8’), 5,84 (d, 1H, J 15,3Hz, H-2’), 6,31 (s, NH, largo), 6,89 (dt, 1H, J 6,9 e 15,3 Hz, H-3’).RMN <strong>de</strong> 13 C (75,5 MHz, CDCl 3 , TMS): δ 14,1 (C-14’); 22,6 (C-13’);26,67; 27,27 (C-6’; C-9’); 28,19; 28,95; 29,65; 30,48 (C-12’ a C-10’; C-5’),31,7 (C-4’), 146,4 (C-3’), 122,5 (C-2’), 31,7 (C-4), 49,2 (C-3), 66,2 (C-5),169,4 (C-1’); 175,7 (C-2), 128,7 (C-8’), 130,9 (C-7’).5.4.10. Co-injeções das acil-HSLs sintéticas com os produtos naturaisOs produtos sintéticos foram utiliza<strong>do</strong>s para confirmação estrutural das acil-HSLs na fração acetato <strong>de</strong> etila <strong>do</strong> cultivo <strong>de</strong> M. mesophilicum (F23, meioCHOI3), através <strong>de</strong> co-injeção por CG-EM e comparações <strong>do</strong>s espectros <strong>de</strong>massas. As análises foram feitas nas seguintes condições: coluna MDN-5S(30 m x 0,25 mm x 0,25 μm), com rampa <strong>de</strong> temperaturas 60-300(12ºC/min)e manti<strong>do</strong> a 300ºC por 10 minutos (para a N-<strong>do</strong><strong>de</strong>canoil-HSL) e 100-290(12ºC/min) e manti<strong>do</strong> a 290ºC por 10 minutos para as <strong>de</strong>maissubstâncias. O injetor operou em mo<strong>do</strong> splitless a 250ºC. O fluxo <strong>de</strong> gás <strong>de</strong>arraste (hélio) foi manti<strong>do</strong> a 1 mL/min.172
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VDEDICATÓRIADEDICO ESTE TRABALHO
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VIIIBraga, Dr. José Augusto R. Rod
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XPOMINI, A. M. ; CABEÇA, L. F. ; C
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XIIde cadeia longa. Realizou-se tam
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XIVacyl-HSLs. We have also studied
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XVINBNOEODPpmR fRMNROERLUSTDSAMTMST
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XX5.4.10. Co-injeções das acil-HS
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