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. Me, 3 (Me) HRMS (EI) : (Found : M +· , 512.1856, ); IR (ATR

2. , S. , J. =2h, and J. =. Dd, (4H, m, ArH); 13 C NMR (CDCl 3 , 75 MHz, ppm) ? 193, Hz, J = 1.5 Hz, ArH), pp.60-67

. Cme, HRMS (EI) : (Found : M +· , 444.2553; C 33 H 32 O required 444.2443); IR (KBr, pp.31-34

. Light, ), 2. dichloromethane ? light petroleum (1:1 to 7:3) Mp (hexane) 222°C ; 1 H NMR (CDCl 3 , 500 MHz, ppm) ? 8.48 (2H, br d, 2008.

. Dispiro, fluorene-9,11'-indeno[2,1-a]fluorene-12, p.1

. Max, Tetrakis(4-tert-butylphenyl)dispiro[fluorene-9,6'-indeno, pp.3132-3144

. Hz, No 13 C has been recorded due to the very low solubility of 1g HRMS (ESI + ): (Found : M +· ,1306.8292; C 100 H 106 required 1306.8295); IR (ATR, cm -1 ) ?= 2962, Tetrakis, vol.173429, issue.187, pp.5-911

. Mhz, 116.4 (4F, s); ? max (THF)/nm 340, pp.1-12

. Light, :98) The title compound 2f was obtained as a slightly yellow solid (yield: 18%) Mp 125°C, p.2

. Mhz, 35 (m, 10H; ArH), 3.60 ppm (s, 6H; Me), C NMR (75 MHz, CD 2 Cl 2 ): ?=168.9 (COOMe)CH), pp.7-5446

. Indeno, 1-a) IF (180 mg, 0.71 mmol) and chromium trioxide (495 mg, 4.95 mmol) were dissolved in acetic anhydride (60 mL) under an argon atmosphere. The solution was stirred for 20 h and poured into a solution of 10% HCl at 0°C and extracted with dichloromethane. The combined extracts were dried (MgSO 4 ), the solvent removed in vacuo and the residue purified by column chromatography on silica eluting with light petroleum The title compound was obtained as an orange solid, p.? ethyl acetate

4. Mhz, D. , and J. =. , 16 (2H, s, ArH), 6.78 (2H, sd, J = 2.1, ArH), 6.72 (4H, sd, J = 1.8, ArH), 1.17 (36H, s, Me), 2H, dd, J = 8.1 J = 2.1, ArH) C NMR (CD 2 Cl 2 , 75 MHz, ppm) ? 151.5 (C), pp.50-57

. Cme, 31.5 (Me);HRMS (ESI + ) : (Found : [M+Na] + , 957, pp.60-56, 2631.

A. ). Hz, 1.16 (36H, s, Me); 13 C NMR (75 MHz, CD 2 Cl 2 ) ? 192, pp.150-157

A. Hz, 77 (4H, d, J= 1.4 Hz, 1H), 1.16 (36H, s, Me), C NMR (75 MHz, CD 2 Cl 2 ) ? 152, p.151

I. Atr, cm -1 ) ? =3066, 1115.

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