4-Toluenesulfonyl chloride → (+/-)-2-(Azidomethyl)-7-tert-butyl-5-methoxy-2,3-dihydro-1-benzofuran

HRID 2116105

反応式

HRID 2116105 の反応式
O1C2C=CC=CC=2C=C1.C1(C)C=CC(S(Cl)(=O)=O)=CC=1.CC1C=CC(S(O[CH2:32][CH:33]2[CH2:37][C:36]3[CH:38]=[C:39]([O:46][CH3:47])[CH:40]=[C:41]([C:42]([CH3:45])([CH3:44])[CH3:43])[C:35]=3[O:34]2)(=O)=O)=CC=1.S(C1C=CC(C)=CC=1)([O-])(=O)=O.[N-:59]=[N+:60]=[N-:61].[Na+]>>[N:59]([CH2:32][CH:33]1[CH2:37][C:36]2[CH:38]=[C:39]([O:46][CH3:47])[CH:40]=[C:41]([C:42]([CH3:45])([CH3:44])[CH3:43])[C:35]=2[O:34]1)=[N+:60]=[N-:61]

参加物

6

反応物 5

HCID 73974-Toluenesulfonyl chlorideHCID 9223BenzofuranHCID 33557Sodium AzideHCID 85570p-ToluenesulfonateHCID 86599179HCID 86599179、化合物

生成物 1

HCID 86599178(+/-)-2-(Azidomethyl)-7-tert-butyl-5-methoxy-2,3-dihydro-1-benzofuran

実験手順

Treatment of 2-tert-butyl-4-methoxyphenol and 3-tert-butyl-4-methoxyphenol (18.25 g, 0.101 mol) with potassium carbonate (55.28 g, 0.400 mol) and allyl bromide (14.69 g, 0.121 mol) followed by treatment of the resultant allyl ether in refluxing mesitylene generally according to the procedure described for Intermediate 8 provided 2-allyl-6-tert-butyl-4-methoxyphenol and 2-allyl-5-tert-butyl-4-methoxyphenol. Treatment of the phenol with 3-chloroperoxybenzoic acid (49.58 g, 0.287 mol, 77%) and potassium carbonate (33.0 g, 0.238 mol) generally according to the procedure described for Intermediate 9 gave 3.23 g (14%) of (±)-(7-tert-butyl-5-methoxy-2,3-dihydro-1-benzofuran-2-yl)methanol as a white solid. Treatment of the benzofuran with p-toluenesulfonyl chloride (2.86 g, 0.015 mol) generally according to the procedure described for Intermediate 10 afforded (±)-(7-tert-butyl-5-methoxy-2,3-dihydro-1-benzofuran-2-yl)methyl 4-methylbenzenesulfonate. Treatment of the tosylate with sodium azide (1.46 g, 22.5 mmol) generally according to the procedure described for Intermediate 98 gave (±)-2-(azidomethyl)-7-tert-butyl-5-methoxy-2,3-dihydro-1-benzofuran. Treatment of the azide with palladium on carbon (0.14 g, 10 wt. %) generally according to the procedure described for Example 1 afforded 1.5 g (40%) of (±)-(7-tert-butyl-5-methoxy-2,3-dihydro-1-benzofuran-2-yl)methylamine) as a white solid, hydrochloride salt. mp 174-176° C.; Anal calcd. for C14H21O2NHCl: C, 61.87; H, 8.16; N, 5.15. Found C, 61.67; H, 8.37; N, 4.93.

出典と根拠

ORDレコード
ord-91a78b251ca94395b11cce5c5f9b1b90
出典データセット
uspto-grants-2008_10
特許番号
US07435837B2

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