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CAS No. : | 6393-01-7 | MDL No. : | MFCD00052675 |
Formula : | C8H12N2 | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | BWAPJIHJXDYDPW-UHFFFAOYSA-N |
M.W : | 136.19 | Pubchem ID : | 160824 |
Synonyms : |
|
Num. heavy atoms : | 10 |
Num. arom. heavy atoms : | 6 |
Fraction Csp3 : | 0.25 |
Num. rotatable bonds : | 0 |
Num. H-bond acceptors : | 0.0 |
Num. H-bond donors : | 2.0 |
Molar Refractivity : | 45.18 |
TPSA : | 52.04 Ų |
GI absorption : | High |
BBB permeant : | Yes |
P-gp substrate : | No |
CYP1A2 inhibitor : | Yes |
CYP2C19 inhibitor : | No |
CYP2C9 inhibitor : | No |
CYP2D6 inhibitor : | No |
CYP3A4 inhibitor : | Yes |
Log Kp (skin permeation) : | -6.21 cm/s |
Log Po/w (iLOGP) : | 1.44 |
Log Po/w (XLOGP3) : | 1.29 |
Log Po/w (WLOGP) : | 1.48 |
Log Po/w (MLOGP) : | 1.48 |
Log Po/w (SILICOS-IT) : | 1.31 |
Consensus Log Po/w : | 1.4 |
Lipinski : | 0.0 |
Ghose : | None |
Veber : | 0.0 |
Egan : | 0.0 |
Muegge : | 1.0 |
Bioavailability Score : | 0.55 |
Log S (ESOL) : | -1.94 |
Solubility : | 1.56 mg/ml ; 0.0115 mol/l |
Class : | Very soluble |
Log S (Ali) : | -1.98 |
Solubility : | 1.42 mg/ml ; 0.0104 mol/l |
Class : | Very soluble |
Log S (SILICOS-IT) : | -2.42 |
Solubility : | 0.514 mg/ml ; 0.00378 mol/l |
Class : | Soluble |
PAINS : | 0.0 alert |
Brenk : | 1.0 alert |
Leadlikeness : | 1.0 |
Synthetic accessibility : | 1.0 |
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P261-P280-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H302+H312+H332-H315-H319-H335 | Packing Group: | N/A |
GHS Pictogram: |
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* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
Nonlimiting examples of suitable aromatic diamines, aminophenols, polyhydric phenols and derivatives thereof, respectively, are the following compounds: ... 2-(4-methylphenyl)-p-phenylenediamine, 2-(2,5-diaminophenyl)-5-methylbenzoic acid, 2-methoxy-p-phenylenediamine, 2,3-dimethyl-p-phenylenediamine, 2,5-dimethyl-p-phenylenediamine, 2-methyl-5-methoxy-p-phenylenediamine, 2,6-methyl-5-methoxy-p-phenylenediamine, 3-methyl-4-amino-N,N-diethylaniline, ... | ||
Nonlimiting examples of suitable aromatic diamines, aminophenols, polyhydric phenols and derivatives thereof, respectively, are the following compounds: ... 2-(4-methylphenyl)-p-phenylenediamine, 2-(2,5-diaminophenyl)-5-methylbenzoic acid, 2-methoxy-p-phenylenediamine, 2,3-dimethyl-p-phenylenediamine, 2,5-dimethyl-p-phenylenediamine, 2-methyl-5-methoxy-p-phenylenediamine, 2,6-methyl-5-methoxy-p-phenylenediamine, 3-methyl-4-amino-N, N-diethylaniline, ... | ||
The process of claim 3 wherein said compound of formula (II) is selected from the group consisting of ... 2-methyl-p-phenylenediamine, methoxy-para-phenylenediamine, chloro-para-phenylenediamine, 2,6-dimethyl-para-phenylenediamine, 2,5-dimethyl-para-phenylenediamine, 2,3-dimethyl-para-phenylenediamine, 2,6-diethyl-para-phenylenediamine, 2-methyl-5-methoxy-para-phenylenediamine, ... |
In addition to these preferred compounds the compounds of formula (II) which are more particularly preferred are chosen from: 2,6-dimethyl-1,4-diaminobenzene 2,5-dimethyl-1,4-diaminobenzene 2,3-dimethyl-1,4-diaminobenzene 2-methoxy-5-methyl-1,4-diaminobenzene 2-methoxy-5-methyl-4-beta-aminoethylamino-1-aminobenzene 2-methyl-5-chloro-4-beta-aminoethylamino-1-aminobenzene 4,6-dimethoxy-1,3-diaminobenzene 2,3-dimethyl-4-aminophenol 2,6-dimethyl-4-aminophenol, and ... | ||
The process of claim 1 wherein the compound of formula (II) is selected from the group consisting of 2,6-dimethyl-1,4-diaminobenzene, 2,5-dimethyl-1,4-diaminobenzene, 2,3-dimethyl-1,4-diaminobenzene, 2-methoxy-5-methyl-1,4-diaminobenzene, 2-methoxy-5-methyl-4-beta-aminoethylamino-1-aminobenzene, 2-methyl-5-chloro-4-beta-aminoethylamino-1-aminobenzene, 4,6-dimethoxy-1,3-diaminobenzene, 2,3-dimethyl-4-aminophenol, 2,6-dimethyl-4-aminophenol and ... | ||
The following compounds with formula (IV) may in particular be cited: ... chloroparaphenylenediamine, 2,3-dimethylparaphenylenediamine, 2,6-dimethylparaphenylenediamine, 2,6-diethylparaphenylenediamine, 2,5-dimethylparaphenylenediamine, 2,6-dimethyl 5-methoxyparaphenylenediamine, N,N-dimethylparaphenylenediamine, N,N-diethylparaphenylenediamine, ... | ||
The method of claim 4 wherein said para-phenylenediamine is selected from the group consisting of ... 2-methyl-p-phenylenediamine, methoxy-para-phenylenediamine, chloro-para-phenylenediamine, 2,6-dimethyl-para-phenylenediamine, 2,5-dimethyl-para-phenylenediamine, 2,3-dimethyl-para-phenylenediamine, 2-methyl-5-methoxy-para-phenylenediamine, 2,6-dimethyl-5-methoxy-para-phenyldiamine, ... | ||
methylamine, ... 1,4-diamino-2-methylbenzene, 1,4-diamino-2-methoxybenzene, 1,4-diamino-2-ethoxybenzene, 1,4-diamino-2-chlorobenzene, 1,4-diamino-2,5-dimethylbenzene, 1,4-diamino-2,5-diethylbenzene, 1,4-diamino-2-methyl-5-methoxybenzene, 1,4-diamino-2,5-dimethoxybenzene, ... | ||
Representative paraphenylenediamines usefully employed as the oxidation base in the present invention include paraphenylenediamine, paratoluylenediamine, methoxyparaphenylenediamine, chloroparaphenylenediamine, 2,6-dimethyl paraphenylenediamine, 2,5-dimethylparaphenylenediamine, 2-methyl-5-methoxy paraphenylenediamine, 2,6-dimethyl-5-methoxy paraphenylenediamine, N,n-dimethyl paraphenylenediamine, 3-methyl-4-amino-N,N-diethylaniline, N,n-di-(beta-hydroxyethyl) paraphenylenediamine, 3-methyl-4-amino-N,N-di-(beta-hydroxyethyl) aniline, 3-chloro-4-amino-N,N-di-(beta-hydroxyethyl) aniline, 4-amino-N,N-(ethyl, carbamylmethyl) aniline, 3-methyl-4-amino-N,N-(ethyl, carbamylmethyl) aniline, ... | ||
, characterized in that the developer is selected from the group consisting of 1,4-diaminobenzene; 1,4-diamino-2-methylbenzene; 1,4-diamino-2,6-dimethylbenzene; 1,4-diamino-3,5-diethylbenzene; 1,4-diamino-2,5-dimethylbenzene; 1,4-diamino-2,3-dimethylbenzene; 2-chloro-1,4-diaminobenzene; 1,4-diamino-2-(thiophen-2-yl)benzene; 1,4-diamino-2-(thiophen-3-yl)benzene; ... | ||
Nonlimiting examples of suitable aromatic diamines, aminophenols, naphthols, polyhydric phenols and derivatives thereof, respectively, are the following compounds: ... 2-(4-methylphenyl)-p-phenylenediamine, 2-(2,5-diaminophenyl)-5-methylbenzoic acid, 2-methoxy-p-phenylenediamine, 2,3-dimethyl-p-phenylenediamine, 2,5-dimethyl-p-phenylenediamine, 2-methyl-5-methoxy-p-phenylenediamine, 2,6-methyl-5-methoxy-p-phenylenediamine, 3-methyl-4-amino-N,N-diethylaniline, ... |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
In N,N-dimethyl acetamide; at 20℃; | Preparation of E-2a:1.1 eq of a dioxane solution of 2-isothiocyanato-l-pyrrolidin-l-yl-ethanone are added to E-Ia (100 mg, 0.71 mmol) in 0.5 mL DMA and the mixture is stirred at RT until the reaction is complete. Then 2 eq 2-isothiocyanato-l-(4-methyl-piperazin-l-yl)-ethanone are added in the form of a solution in dioxane and the mixture is stirred again at RT. After the reaction has ended the volatile constituents are removed and the product is isolated by chromatography. (HPLC tRet = 0.0 min; MS [M+H]+: m/z = 506) |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
65% | In tetrahydrofuran; at 85℃; for 4 - 5h; | 4-Bromomethyl-2,6-di-tert-butyl-phenol (2.42 g, 0.008 mole) was dissolved in 50 ML of dry tetrahydrofuran.. In a separate conical flask 2,5-dimethyl-benzene-1,4-diamine (2.17 g, 0.016 mole) was dissolved in 25 ML of tetrahydrofuran and solution was transferred to a cylindrical funnel with pressure equalizing tube. Three-necked round-bottom flask containing solution of 4-Bromomethyl-2,6-di-tert-butyl-phenol was kept in oil-bath at 85 C. Solution in the flask was continuously stirred with the help of magnetic stirrer. 2,5-dimethyl-para-phenylene diamine solution was added drop-by-drop, from funnel to the flask in acidic medium for a span of 4-5 hours till all the solution was poured out.. The reaction was terminated after that and the final reaction mixture was allowed to attain room temperature.. Product was separated by solvent evaporation.. The product was purified using silica gel column chromatography.. Product was identified by 1H-NMR. The yield of 4-[(4-Amino-2,5-dimethyl-phenylamino)-2,6di-tert-butyl-phenol is 1.86 g (65%). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With hydrogen;ruthenium on aluminium oxide; In ethanol; at 100℃; for 72h; | A solution of 1,3-dimethylphenylene-2,4-diamine (5 g, 36.7 mmol), 5%Ru on Al2O3 in ethanol (100 ml) was shaken under 950 psi hydrogen pressure at 100 C. for 72 hours, filtered and concentrated under reduced pressure to provide the titled compound. MS(CI(+)Q1MS m/z 143 (M+H)+). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
52% | With potassium carbonate; In acetone; at 80℃; for 4 - 5h; | EXAMPLE 4 This example describes the synthesis of 4-[(4-Amino-2,5-dimethyl-phenylamino)-methyl]-2-benzotriazol-2-yl-phenol. 2,5-dimethyl-para-phenylene diamine (2.1 equivalent, 0.469 g, 0.00345 mole), potassium carbonate (2.2 equivalent, 0.50 g, 0.60361 mole) and 25 ml acetone were magnetically stirred in a 100 ml two-necked round-bottom flask. 2-Benzotriazol-2-yl-4-bromomethyl-phenol (1 equiv., 0.5 g, 0.00164 mole) was dissolved in 50 ml of acetone and solution was transferred to a cylindrical funnel with pressure equalizing tube. Two-necked round-bottomed flask containing solution of 2,5-dimethyl-para-phenylene diamine was kept in oil-bath at 80 C. 2-Benzotriazol-2-yl-4-bromomethyl-phenol solution was added drop-wise, from funnel to the flask for a span of 4-5 hours till all the solution was poured out. After that heating was stopped and the final reaction mixture was allowed to cool at room temperature. The product was separated by column chromatography. The yield was 52%. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With piperidine; Carbonyldiimidazole; tin-2-ethylhexanoate dihydrate; potassium tert-butylate; water; N-ethyl-N,N-diisopropylamine; trifluoroacetic acid; diisopropyl-carbodiimide; dibromotriphenylphosphorane; In DMF (N,N-dimethyl-formamide); dichloromethane; N,N-dimethyl acetamide; 1,2-dichloro-ethane;Combinatorial reaction / High throughput screening (HTS); | EXAMPLE 1 [0213] This example shows the synthesis of a combinatorial library of thioquinazolinone derivatives. [0214] Step 1a: Preparation of Wang Bromide Resin [0215] 40 tea bags containing 2 g each of Wang resin (80 g, 120 mmol) was taken in a 5 L PP container. A solution of triphenylphosphine dibromide (152 g, 0.15 M, 3 eq., 360 mmol) in 2000 ml DCM was added and the solution was shaken at room temperature overnight. The resin was sequentially washed with DCM (4×, 1.5 L each) and diethylether (6×, 1.5 L each) and dried under vacuum, to give the bromo wang resin. [0216] Step 1b: Loading of the Nitrophenol on Bromo Wang [0217] 20 g of the Bromo wang resin (1.5 meq/g) was taken in a 2 L wide-mouthed glass container and 1000 mL DMA was addded to it followed by the addition of the nitro phenol (10 eq., 0.3M, 300 mmol). Potasium t-butoxide (33.46 g, 10 eq., 300 mmol) was then added to it and the bottles were heated at 50 C. overnight. The bags were washed alternatively with DMF (500 mL) and DCM (500 mL) 3 cycles followed by 6 cycles of MeOH (500 mL). The tea bags were then dried overnight in air. The following nitrophenols were used: [0218] 2-METHYL-5-NITROPHENOL [0219] 5-HYDROXY-2-NITROBENZOTRIFLUORIDE [0220] 3-METHYL-4-NITROPHENOL [0221] 2-METHOXY-5-NITROPHENOL [0222] M-NITROPHENOL [0223] Step 1c: Reduction of the Nitro Group to Amine [0224] A 2.0 M solution of tin-2-ethylhexanoate dihydrate was prepared in DMF containing 0.5% H2O. The tea bags were added and the solution is heated at 50 C. for 40 hours. After cooling the bags are washed with DMF/10% HOAc (3×), DMF (3×), 5% DIEA/DCM (2×), DCM (2×) and MeOH (2×) and dried in air overnight. [0225] Step 1d: Coupling N-FMOC Protected Amino Acid to Wang Resin. [0226] 20 g of Wang resin (1.5 meq/g) was placed in a porous polypropylene packet (Tea-bag, 60 mm×60 mm, 65mu) and taken in a 1000 mL plastic bottle. DMF (300 mL), DCM (300 mL), FMOC-Cyclohexyl alanine (70.82 g, 6 eq., 0.3M, 180 mmol), DIC (22.71 g, 6 eq., 180 mmol), HOBt (24.32 g, 6 eq., 180 mmol) were added sequentially. After shaking for 12 hours, the packet was washed alternatively with DMF (500 mL) and DCM (500 mL) 3 cycles followed by 6 cycles of MeOH (500 mL). The packet was then dried overnight in air. The tea bags containing the amino acids were then treated with 20% piperidine/DMF for 2 h at room temperature to deblock the FMOC group. The following amino acids were used: [0227] FMOC-GLY-OH [0228] FMOC-ALA-OH [0229] FMOC-L-ISOLEUCINE [0230] FMOC-L-PHENYLALANINE [0231] FMOC-D-NLE-OH [0232] FMOC-CHA-OH [0233] FMOC-L-TRYPTOPHAN [0234] Step 1e: Coupling of the Diamines to Wang Resin [0235] 20 g of Wang resin (1.5 meq/g) was placed in a porous polypropylene packet (Tea-bag, 60 mm×60 mm, 65mu) and taken in a 1000 mL Nalgene bottle. 600 mL of DCM was added followed by the addition of the carbonyl diimidazole (29.9 g, 6 eq., 0.3M, 180 mmol) and the flasks were shaken at room temperature for 3 hours after which they were decanted and washed with DCM (2×, 600 mL). To these Nalgene bottles were added the diamines (6 eq., 0.4M, 180 mmol) in 450 mL of DCM (0.4M) and they were shaken at room temperature overnight. The diamines used were as follows: [0236] 2,2-DIMETHYL-1,3-PROPANEDIAMINE [0237] 1,3-CYCLOHEXANEDIAMINE [0238] (1R,2R)-(-)-1,2-DIAMINOCYCLOHEXANE [0239] TRANS-1,4-DIAMINOCYCLOHEXANE [0240] P-XYLYLENEDIAMINE [0241] 1,4-BIS(3-AMINOPROPYL)PIPERAZINE [0242] ETHYLENEDIAMINE [0243] 1,3-DIAMINOPROPANE [0244] 1,8-DIAMINO-3,6-DIOXAOCTANE [0245] 1,4-DIAMINOBUTANE [0246] 1,5-DIAMINOPENTANE [0247] 1,6-HEXANEDIAMINE [0248] N,N-BIS(3-AMINOPROPYL)METHYLAMINE [0249] 2,2'-THIOBIS(ETHYLAMINE) [0250] 2,5-DIMETHYL-1,4-PHENYLENEDIAMINE [0251] After shaking overnight, the packets was washed alternatively with DMF (500 mL) and DCM (500 mL) 3 cycles followed by 6 cycles of MeOH (500 mL). The packet was then dried in air. [0252] Step 2: Formation of the Isothiocyanate [0253] The o-amino benzoate ester (136 g, 10 eq., 900 mmol) was taken in a 5 L wide-mouthed glass bottle and 2.7 L of dichloroethane was added to it (0.3M). The following esters were used: [0254] METHYL ANTHRANILATE [0255] METHYL 2-AMINO-4-CHLOROBENZOATE [0256] 2-AMINO-4,5-DIMETHOXYBENZOIC ACID [0257] METHYL ESTER [0258] METHYL 3,4,5-TRIMETHOXYANTHRANILATE [0259] DIMETHYL AMINOTEREPHTHALATE [0260] METHYL 2-AMINO-5-BROMOBENZOATE [0261] METHYL 3-AMINOTHIOPHENE-2-CARBOXYLATE [0262] METHYL 3-AMINO-5-PHENYLTHIOPHENE-2-CARBOXYLATE [0263] Thiocarbonyl diimidazole (160 g, 10 eq., 900 mmol) was added to it and the solution was heated at 55 C. overnight to form the isothiocyanate. [0264] Step 3: Formation of the Thioquinazolinone [0265] The next day the tea bags containing the amino acids, diamines and the amino phenols on wang resin (90 mmol) was added to the isothiocyanate solution from reaction 2 and the glass bottles were heated at 55 C. overnight. After cooling the bags was washed alternatively with DMF (2000 mL) and DCM (2000 mL) 3 cycles followed by 6 cycles of MeOH... |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
98.6% | In ethyl acetate; | 1,4-di(benzoylthiocarbamoylamino)-2,5-dimethylbenzene 2,5-Dimethyl-p-phenylenediamine (0.340 g, 2.5 mM) was dissolved in 30 ml of ethyl acetate, and 2 equivalents of benzoylisothiocyanate (0.816 g, 5 mM) were added. The mixture was stirred at room temperature for 10 minutes. After cooling, the reaction mixture was filtered, and washed with ethyl acetate/n-hexane to obtain 1.14 g (98.6% yield) of a colorless crystal of compound A-26. Melting point: 228 C. (dec.) 1 H-NMR (DMSO-d6) ppm delta=2.26 (6H, s, phi-CH3 x 2) delta=7.53-7.70 (12H, m, --C6 H2 --, C6 H5 -- x 2) delta=11.69 (2H, broad s, --NH-- x 2) delta=12.28 (2H, broad s, --NH-- x 2) |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
62% | With sodium t-butanolate;tris-(dibenzylideneacetone)dipalladium(0); tri-tert-butyl phosphine; In toluene; at 80℃; for 5h; | (1) Synthesis of Intermediate E; 1.36 g (10.0 mmol) of <strong>[6393-01-7]2,5-dimethyl-1,4-phenylenediamine</strong> and 3.77 g (24.0 mmol) of 4-bromobenzene were dissolved in 50 M of toluene. 2.88 g (30.0 mmol) of sodium t-butoxide, 0.388 g (0.40 mmol) of Pd(dba)2, and 0.08 g (0.40 mmol) of tri-t-butylphosphine((t-Bu)3P) were added to the solution, and the mixture was stirred at 80 C, for 5 hours. The resultant mixture was cooled to room temperature, and then 50 M of water was added thereto, and the resultant was subjected to extraction three times, using 20 M of ethyl ether. A collected organic layer was dried using magnesium sulfate, and the residue prepared by removing the solvent was separated and purified, using a silica gel column chromatography, to obtain 1.78 g of Intermediate E (Yield: 62 %). 1H NMR (CDCl3, 400MHz) delta (ppm) 7.28-6.89 (m, 12H), 5.43 (s, 2H), 2.15 (s, 3H); 13C NMR (CDCl3, 100MHz) delta (ppm) 147.5, 139.2, 134.9, 129.3, 121.0, 117.5, 18.2. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
68% | With sodium t-butanolate;tri-tert-butyl phosphine; bis(dibenzylideneacetone)-palladium(0); In toluene; at 80℃; for 5h; | (1) Synthesis of Intermediate A; 1.36 g (10.0 mmol) of <strong>[6393-01-7]2,5-dimethyl-1,4-phenylenediamine</strong> and 4.10 g (24.0 mmol) of 4-bromotoluene were dissolved in 50 M of toluene. 2.88 g (30.0 mmol) of sodium t-butoxide, 0.388 g (0.40 mmol) of Pd(dba)2 and 0.08 g (0.40 mmol) of tri-t-butylphosphine((t-Bu)3P) were added to the solution, and the mixture was stirred at 80 C, for 5 hours. The resultant mixture was cooled to room temperature, and then 50 M of water was added thereto. The resultant mixture was subjected to extraction three times, using 20 M of ethyl ether. A collected organic layer was dried using magnesium sulfate, and the residue (prepared by removing the solvent) was separated and purified using a silica gel column chromatography, to obtain 2.15 g of Intermediate A (Yield: 68 %). 1H NMR (CDCl3, 400MHz) delta (ppm) 7.24-7.33 (m, 4H), 7.09 (s, 2H), 6.85-6.78 (m, 4H), 5.25 (bs, 2H), 2.32 (s, 6H), 2.17 (s, 6H); 13C NMR (CDCl3, 100MHz) delta (ppm) 145.8, 133.2, 128.5, 127.8, 123.8, 122.5, 116.8, 17.6, 15.7. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
71% | With sodium t-butanolate;tris-(dibenzylideneacetone)dipalladium(0); tri-tert-butyl phosphine; In toluene; at 80℃; for 5h; | (1) Synthesis of Intermediate C; 1.36 g (10.0 mmol) of <strong>[6393-01-7]2,5-dimethyl-1,4-phenylenediamine</strong> and 5.13 g (22.0 mmol) of 4-bromobiphenyl was dissolved in 50 M of toluene. 2.88 g (30.0 mmol) of sodium t-butoxide, 0.388 g (0.40 mmol) of Pd(dba)2, and 0.08 g (0.40 mmol) of tri-t-butylphosphine((t-Bu)3P) were added to the solution, and the mixture was stirred at 80 C, for 5 hours. The resultant mixture was cooled to room temperature, and then 50 M of water was added thereto, and the resultant was subjected to extraction three times, using 20 M of ethyl ether. A collected organic layer was dried using magnesium sulfate, and the residue prepared by removing the solvent was separated and purified, using a silica gel column chromatography, to obtain 3.13 g of Intermediate C (Yield: 71 %). 1H NMR (CDCl3, 400MHz) delta (ppm) 7.24-7.04 (m, 14H), 6.75-6.58 (m, 4H), 5.12 (bs, 2H), 2.17 (s, 6H); 13C NMR (CDCl3, 100MHz) delta (ppm) 145.8, 133.2, 131.5, 129.7, 128.5, 127.8, 124.3, 123.8, 122.5, 119.5, 116.8, 17.6. |