Boron tribromide → 2-(4-(2-Chloro-6-methoxyphenyl)-9-hydroxy-1,3-dioxo-2,3-dihydropyrrolo[3,4-c]carbazol-6 (1H)-yl)ethyl methanesulfonate

HRID 11056Notes

Reaction equation

[Cl:1][C:2]1[CH:7]=[CH:6][CH:5]=[C:4]([O:8][CH3:9])[C:3]=1[C:10]1[C:22]2[C:23](=[O:27])[NH:24][C:25](=[O:26])[C:21]=2[C:20]2[C:19]3[CH:18]=[C:17]([O:28]C)[CH:16]=[CH:15][C:14]=3[N:13]([CH2:30][CH2:31][OH:32])[C:12]=2[CH:11]=1.[CH3:33][S:34](Cl)(=[O:36])=[O:35].B(Br)(Br)Br.COC1C=CC2NC3C=C(C(OCC4C=CC=CC=4)=O)C4C(=O)NC(=O)C=4C=3C=2C=1>>[CH3:33][S:34]([O:32][CH2:31][CH2:30][N:13]1[C:12]2[CH:11]=[C:10]([C:3]3[C:4]([O:8][CH3:9])=[CH:5][CH:6]=[CH:7][C:2]=3[Cl:1])[C:22]3[C:23](=[O:27])[NH:24][C:25](=[O:26])[C:21]=3[C:20]=2[C:19]2[CH:18]=[C:17]([OH:28])[CH:16]=[CH:15][C:14]1=2)(=[O:36])=[O:35]

Participants

Reactant 4

HCID 25134Boron tribromide

HCID 31297Methanesulfonyl chloride

HCID 11843434Benzyl 9-methoxy-1,3-dioxo-1,2,3,6-tetrahydropyrrolo[3,4-c]carbazole-4-carboxylate

HCID 697128724-(2-Chloro-6-methoxyphenyl)-6-(2-hydroxyethyl)-9-methoxypyrrolo[3,4-c]carbazole-1,3(2H,6H)-dione

Product 1

HCID 867601972-(4-(2-Chloro-6-methoxyphenyl)-9-hydroxy-1,3-dioxo-2,3-dihydropyrrolo[3,4-c]carbazol-6 (1H)-yl)ethyl methanesulfonate

Procedure

Reaction of 4-(2-Chloro-6-methoxyphenyl)-6-(2-hydroxyethyl)-9-methoxypyrrolo[3,4-c]carbazole-1,3(2H,6H)-dione (V; Ar=2-chloro-6-methoxyphenyl, R10═CH2CH2OH) (111) prepared as described in example 63 with methanesulphonyl chloride, followed by reaction with BBr3 using the procedure described in example 170 of Scheme 3 gave 2-(4-(2-Chloro-6-methoxyphenyl)-9-hydroxy-1,3-dioxo-2,3-dihydropyrrolo[3,4-c]carbazol-6 (1H)-yl)ethyl methanesulfonate (VII; Ar=2-chloro-6-methoxyphenyl, n=2, mesylate) (114), as a yellow solid, which was used without further purification.

Sources & evidence

ORD record: ord-0c617c646dab4d34a16f55b00127ee4c
Source dataset: uspto-grants-2006_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07094798B1

Reaction notes

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