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1 Supplementary Material Preparation of symmetrical C2-C2-linked bis- and tris-6-bromoindoles by Sonogashira couplings and 5-endo-dig cyclization induced by nbu 4 NF Raúl Balderrama-Martínez-Sotomayor, Mariana Flores-Jarillo, and Alejandro Alvarez-Hernandez* Área Académica de Química. Universidad Autónoma del Estado de Hidalgo. Carr. Pachuca-Tulancingo Km 4.5. Pachuca, Hidalgo Mexico alvarez@uaeh.edu.mx Page S1 ARKAT-USA, Inc.
2 Table of contents Experimental technique for preparation of compounds 3a-h.. 2S 1H and 13 C NMR spectra Compound 3a.... 8S Compound 3b S Compound 3c...12S Compound 3d...14S Compound 3e...16S Compound 3f... 18S Compound 3g..20S Compound 3h..22S Compound 4a...24S Compound 4b...26S Compound 4c...28S Compound 4d...30S Compound 4e...32S Compound 4f...34S Compound 4g... 36S Compound 4h...38S Compound 4i...40S Compound 5d..42S Compound 5e...44S Compound 5f...46S Compound 5g... 48S Compound 5i...50S Page S2 ARKAT-USA, Inc.
3 Preparation of dialkynes 3a-h 3,6-diethynyl-9-hexyl-9H-carbazole (3a) was prepared according to the reported procedure: Zhang, W.; Cho, H. M.; Moore, J. S. rg. Synth. 2007, 84, Iodohexane was used instead of the 1-bromotetradecane used in the original report for N-alkylation of carbazole. 4,4'-diethynyl-1,1'-biphenyl (3b) was prepared according to the following procedure: Sonogashira coupling. In a dry round bottom flask equipped with a stirring bar and septum under a N 2 atmosphere was added 405 mg (1 mmol, 1 equiv.) of 4,4'-diiodo-biphenyl, 23 mg (0.05 mmol, 0.05 equiv) of Pd 2 (dba) 3, 6 mg (0.03 mmol, 0.03 equiv.) of CuI and 16 mg (0.06 mmol, 0.06 equiv.) of PPh 3 10 ml of DMS and 5 ml of THF. The flask was purged using vacuum, then a current of N 2. Then 240 µl (2.2 mmol, 2.2 equiv.) of trimethylsylilacetilene and 350 µl (2.5 mmol, 2.5 equiv.) of ipr 2 NH were added to the flask. The mixture was left stirring at 45 ºC during 1 h. Then the reaction mixture was diluted with 100 ml of ethyl acetate) and washed with water (2X100 ml) then with brine (1x100mL). The organic portion was dried over anh. Na 2 S 4, filtered and concentrated under vacuum. Column chromatography eluting with hexane gave 236 mg (76%) of a yellow solid, mp ºC; R f = 0.60 (5% EtAc/hexanes); IR (KBr) 3040, 2957, 2886, 2158, 1489 cm -1 ; 1 H RMN (400 MHz, CDCl 3 ): δ 7.51 (s, 8H), 0.24 (d, J = 0.5 Hz, 18H); 13 C RMN (100 MHz, CDCl 3 ): δ 140.2, 132.4, 126.7, 122.4, 104.8, 95.2, Deprotection. In a round bottom flask containing an stirring bar and under a N 2 atmosphere was added 186 mg (0.78 mmol, 1 equiv) the bis protected acetylene from the previous step, g (7.8 mmol, 10 equiv) de K 2 C 3 and 5 ml of methanol. The mixture was Page S3 ARKAT-USA, Inc.
4 stirred for 15 min at room temperature and then concentrated under vacuum. The residue was chromatographed using 95:5 hexanes:etac to obtain 99 mg (63%) of 3b as a yellow solid, mp ºC; R f = 0.43 (5% EtAc/hexanes); IR (KBr) ν 3275, 3038, 2922, 2852, 2107, 1490 cm -1 ; 1 H RMN (400 MHz, CDCl 3 ): δ 7.56 (m, 8H), 3.15 (s, 2H); 13 C RMN (100 MHz, CDCl 3 ): δ 140.5, 132.6, 126.9, 121.4, 83.4, ,5-diethynyl-morpholinebenzamide (3c) was prepared according to the following procedure: I I TMS R R N Pd 2 (dba) 3 CuI,PPh 3 DMS, 45 C, 1h N R=TMS R=H K 2 C 3,MeH,15min Sonogashira coupling. In a round bottom flask equipped with a stirring bar and under a N 2 atmosphere was added 221 mg (0.49 mmol, 1 equiv.) of 2,5-diiodo morpholine benzamide,* 13 mg (0.025 mmol, 0.05 equiv.) of Pd 2 (dba) 3, 3 mg (0.015 mmol, 0.03 equiv) of CuI, and 8 mg (0.03 mmol, 0.06 equiv) of PPh 3. Then was added 5 ml de DMS and the flask was purged with vacuum followed by a current of N 2. Then, 150 µl (1.05 mmol, 2.1 equiv.) of trimethylsylilacetilene and 180 µl (1.25 mmol, 2.5 equiv.) of ipr 2 NH were added and the mixture was stirred at 45 ºC for 1 h. Then the crude was diluted with 100 ml of ethyl acetate and washed with water (3X60 ml) and brine 1x100 ml. The organic portion was dried over Na 2 S 4, filtered and concentrated under vacuum. Column chromatography using hexane:ethyl acetate gradients (95:5, 90:10, 80:20) gave mg (86%) the compound 3c as a yellow solid. mp ºC; R f = 0.83 (20% EtAct/ 80% hexanes); IR (KBr) 3035, 2922, 2860, 2162, 1646, 1251 cm -1 ; 1 H RMN (400 MHz, CDCl 3 ): δ 7.41 (m, 3H), 3.75, (m, 8H), 0.24 (m, 18H); 13 C RMN (100 MHz, CDCl 3 ): δ 167.8, 139.0, 132.6, 132.2, 130.2, 124.1, 120.0, Page S4 ARKAT-USA, Inc.
5 103.7, 101.8, 100.6, 98.0, 67.1, 66.8, 47.4, 42.2, 0.1. Deprotection. In a round bottom flask containing an stirring bar, under a N 2 atmosphere was added 133 mg (0.35 mmol, 1 equiv) of the coupling product from the previous step, 434 mg (3.5 mmol, 10 equiv) de K 2 C 3 and 5 ml of methanol and the mixture was stirred at room temperature for 15 min. Column chromatography using gradients of hexanes:ethyl acetate gave 70.4 mg (84%) of 3c as a white solid. mp ºC; R f = 0.33 (40% AcEt/hexanes); IR (KBr) 3222, 3054, 2924, 2845, 2101, 1627, 1467 cm -1 ; 1 H RMN (400 MHz, CDCl 3 ): δ (m, 3H), 3.76 (s, 2H), (m, 4H), (m, 4); 13 C RMN (100 MHz, CDCl 3 ): δ , , 132.9, 132.4, , , , 82.87, 80.29, 66.82, 66.64, 47.27, *For preparation of 2,5-diiodo-morpholinebenzamide see: Flores-Jarillo, M.; Ayala-Mata, F.; Zepeda-Vallejo, G.; Vázquez García, R. A.; Ramos-rtiz, G.; Mendez-Rojas, M. A.; Suarez-Castillo,. R.; Alvarez-Hernandez, A. J. Mex. Chem. Soc. 2015, 59, In press. Alkynes 3d-i. These compounds were prepared according to the reported procedure: Wang, Y.; Ji, K.; Lan, S.; Zhang, L. Angew. Chem. Int. Ed. 2012, 51, See the supporting material. Page S5 ARKAT-USA, Inc.
6 1 H and 13 C NMR Spectra Page S6 ARKAT-USA, Inc.
7 1 H NMR spectrum of 2 in acetone-d6 400 MHz. Page S7 ARKAT-USA, Inc.
8 13 C NMR spectrum of 2 in acetone-d6 100 MHz. Page S8 ARKAT-USA, Inc.
9 N 1 H NMR spectrum of 3a in CDCl MHz Page S9 ARKAT-USA, Inc.
10 N 13 C NMR spectrum of 3a in CDCl MHz Page S10 ARKAT-USA, Inc.
11 1 H NMR spectrum of 3b in CDCl MHz Page S11 ARKAT-USA, Inc.
12 13 C NMR spectrum of 3b in CDCl MHz Page S12 ARKAT-USA, Inc.
13 N 1 H NMR spectrum of 3c in CDCl MHz Page S13 ARKAT-USA, Inc.
14 N 13 C NMR spectrum of 3c in CDCl MHz Page S14 ARKAT-USA, Inc.
15 1 H NMR spectrum of compound 3d in CDCl MHz Page S15 ARKAT-USA, Inc.
16 13 C NMR spectrum of compound 3d in CDCl MHz Page S16 ARKAT-USA, Inc.
17 1 H NMR spectrum of compound 3e in CDCl MHz Page S17 ARKAT-USA, Inc.
18 13 C NMR spectrum of compound 3e in CDCl MHz Page S18 ARKAT-USA, Inc.
19 1 H NMR spectrum of compound 3f in CDCl MHz Page S19 ARKAT-USA, Inc.
20 13 C NMR spectrum of compound 3f in CDCl MHz Page S20 ARKAT-USA, Inc.
21 1 H NMR spectrum of compound 3g in CDCl MHz Page S21 ARKAT-USA, Inc.
22 13 C H NMR spectrum of compound 3g in CDCl MHz Page S22 ARKAT-USA, Inc.
23 1 H NMR spectrum of compound 3h in CDCl MHz Page S23 ARKAT-USA, Inc.
24 13 C NMR spectrum of compound 3h in CDCl MHz Page S24 ARKAT-USA, Inc.
25 Br Br NH HN N 1 H NMR spectrum of 4a in CDCl MHz Page S25 ARKAT-USA, Inc.
26 Br Br NH HN N 13 C NMR spectrum of 4a in CDCl MHz Page S26 ARKAT-USA, Inc.
27 Br Br NH HN 1 H NMR spectrum of 4b in CDCl MHz Page S27 ARKAT-USA, Inc.
28 Br Br NH HN 13 C NMR spectrum of 4b in CDCl MHz Page S28 ARKAT-USA, Inc.
29 Br Br NH N HN 1 H NMR spectrum of compound 4c in CDCl MHz Page S29 ARKAT-USA, Inc.
30 Br Br NH N HN 13 C NMR spectrum of compound 4c in CDCl MHz Page S30 ARKAT-USA, Inc.
31 1 H NMR spectrum of compound 4d in CDCl MHz Page S31 ARKAT-USA, Inc.
32 13 C NMR spectrum of compound 4d in CDCl MHz Page S32 ARKAT-USA, Inc.
33 1 H NMR spectrum of compound 4e in CDCl MHz Page S33 ARKAT-USA, Inc.
34 13 C NMR spectrum of compound 4e in CDCl MHz Page S34 ARKAT-USA, Inc.
35 1 H NMR spectrum of compound 4f in CDCl MHz Page S35 ARKAT-USA, Inc.
36 13 C NMR spectrum of compound 4f in CDCl MHz Page S36 ARKAT-USA, Inc.
37 1 H NMR spectrum of compound 4g in CDCl MHz Page S37 ARKAT-USA, Inc.
38 13 C NMR spectrum of compound 4g in CDCl MHz Page S38 ARKAT-USA, Inc.
39 1 H NMR spectrum of compound 4h in CDCl MHz Page S39 ARKAT-USA, Inc.
40 13 C NMR spectrum of compound 4h in CDCl MHz Page S40 ARKAT-USA, Inc.
41 1 H NMR spectrum of compound 4i in CDCl MHz Page S41 ARKAT-USA, Inc.
42 13 C NMR spectrum of compound 4i in CDCl MHz Page S42 ARKAT-USA, Inc.
43 1 H NMR spectrum of compound 5d in DMS-d6 400 MHz Page S43 ARKAT-USA, Inc.
44 13 C NMR spectrum of compound 5d in DMS-d6 100 MHz Page S44 ARKAT-USA, Inc.
45 1 H NMR spectrum of compound 5e in DMS-d6 400 MHz Page S45 ARKAT-USA, Inc.
46 Br HN NH Br 13 C NMR spectrum of compound 5e in DMS-d6 100 MHz Page S46 ARKAT-USA, Inc.
47 1 H NMR spectrum of compound 5f in DMS-d6 400 MHz Page S47 ARKAT-USA, Inc.
48 trisindol-carbn_01 trisindol f1 (ppm) C NMR spectrum of compound 5f in DMS-d6 100 MHz Page S48 ARKAT-USA, Inc.
49 1 H NMR spectrum of compound 5g in DMS-d6 400 MHz Page S49 ARKAT-USA, Inc.
50 13 C NMR spectrum of compound 5g in DMS-d6 100 MHz Page S50 ARKAT-USA, Inc.
51 1 H NMR spectrum of compound 5i in DMS-d6 400 MHz Page S51 ARKAT-USA, Inc.
52 13 C NMR spectrum of compound 5i in DMS-d6 100 MHz Page S52 ARKAT-USA, Inc.
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