Triphenylphosphine → HCID 68968584, compound

HRID 2116287Notes

Reaction equation

HRID 2116287 reaction equation
[N:1]([CH2:4][CH:5]1[CH2:9][C:8]2[CH:10]=[CH:11][C:12]([Cl:21])=[C:13]([C:14]3[CH:19]=[CH:18][CH:17]=[CH:16][C:15]=3[CH3:20])[C:7]=2[O:6]1)=[N+]=[N-].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>O1CCCC1>[Cl:21][C:12]1[CH:11]=[CH:10][C:8]2[CH2:9][CH:5]([CH2:4][NH2:1])[O:6][C:7]=2[C:13]=1[C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][C:15]=1[CH3:20]

Participants

4

Reactant 2

HCID 11776TriphenylphosphineHCID 86599289HCID 86599289, compound

Product 1

HCID 68968584HCID 68968584, compoundYield 21.9%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

Treatment of 1-bromo-2-methylbenzene (5.0 g, 26.88 mmol) with (2-chloro-6-methyoxyphenyl)boronic acid (13.8 g, 80.6 mol) generally according to the procedure described for Intermediate 37 afforded 3.85 g (62%) of 6-chloro-2′-methylbiphenyl-2-yl methyl ether. Treatment of 6-chloro-2′-methylbiphenyl-2-yl methyl ether with hydrogen bromide (100 mL, 30 wt. % in acetic acid) generally according to the procedure described for Example 395 afforded brown oil. The oil was reacted with sodium hydride (0.61 g, 25.38 mmol) and allyl bromide (3.07 g, 25.38 mmol) followed by refluxing the resultant allyl ether in mesitylene generally according to the procedure described for Intermediate 8 provided 3-allyl-6-chloro-2′-methylbiphenyl-2-ol. Treatment of 3-allyl-6-chloro-2′-methylbiphenyl-2-ol (4.38 g, 16.92 mmol) with m-chloroperoxybenzoic acid (4.38 g, 25.38 mmol, 77%) and potassium carbonate (2.81 g, 20.30 mmol) generally according to the procedure described for Intermediate 9 afforded 2.4 g (52%) of (±)-[7-(2-methylphenyl)-6-chloro-2,3-dihydro-1-benzofuran-2-yl]methanol. Treatment (±)-[7-(2-methylphenyl)-6-chloro-2,3-dihydro-1-benzofuran-2-yl]methanol (2.4 g, 8.73 mmol) with p-toluenesulfonyl chloride (2.50 g, 13.1 mmol) generally according to the procedure described for Intermediate 10 gave 3.2 g (85%) of (±)-[6-chloro-7-(2-methylphenyl)-2,3-dihydro-1-benzofuran-2-yl]methyl 4-methylbenzenesulfonate as a colorless oil. Treatment of (±)-[6-chloro-7-(2-methylphenyl)-2,3-dihydro-1-benzofuran-2-yl]methyl 4-methylbenzenesulfonate (0.21 g, 0.49 mmol) with sodium azide (0.35 g, 5.38 mmol) generally according to the procedure described for Intermediate 98 afforded 0.14 g, (99%) of (±)-2-(azidomethyl)-7-(2-methylphenyl)-6-chloro-2,3-dihydro-1-benzofuran. Treatment of (±)-2-(azidomethyl)-7-(2-methylphenyl)-6-chloro-2,3-dihydro-1-benzofuran (0.14 g, 0.468 mmol) in tetrahydrofuran (10 m]L) with polymer-supported triphenylphosphine (0.24 g, 0.936 mmol) generally according to the procedure described for Example 154 provided 0.028 g (18%) of (±)-{[6-chloro-7-(2-methylphenyl)-2,3-dihydro-1-benzofuran-2-yl]methyl}amine as a white solid, hydrochloride salt. mp 204-206° C.

Sources & evidence

ORD record
ord-0691958c0637454fb1d1359469d9ab62
Source dataset
uspto-grants-2008_10
Patent number
US07435837B2

Reaction notes

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