4-Toluenesulfonyl chloride → HCID 86599288, compound

HRID 2116285Notes

Reaction equation

[CH3:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[C:8]1[C:16]2[O:15][CH:14]([CH2:17][OH:18])[CH2:13][C:12]=2[CH:11]=[CH:10][C:9]=1[Cl:19].[C:20]1([CH3:30])[CH:25]=[CH:24][C:23]([S:26](Cl)(=[O:28])=[O:27])=[CH:22][CH:21]=1>>[CH3:30][C:20]1[CH:25]=[CH:24][C:23]([S:26]([O:18][CH2:17][CH:14]2[CH2:13][C:12]3[CH:11]=[CH:10][C:9]([Cl:19])=[C:8]([C:3]4[CH:4]=[CH:5][CH:6]=[CH:7][C:2]=4[CH3:1])[C:16]=3[O:15]2)(=[O:28])=[O:27])=[CH:22][CH:21]=1

Participants

Reactant 2

HCID 73974-Toluenesulfonyl chloride

HCID 68966518HCID 68966518, compound

Product 1

HCID 86599288HCID 86599288, compoundYield 85.5%

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-013b25a2cdae4f8b862a55cbf31c194e
Source dataset: uspto-grants-2008_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07435837B2

Reaction notes

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