Toluene → 3-Chloro-9-bromo-8-((S)-2,2-dimethyl-[1,3]dioxolan-4-yl methoxy)-6,6-dimethyl-5,6-dihydro-benzo[b]carbazol-11-one

HRID 61831

Reaction equation

[Br:1][C:2]1[C:22]([OH:23])=[CH:21][C:5]2[C:6]([CH3:20])([CH3:19])[C:7]3[NH:8][C:9]4[C:14]([C:15]=3[C:16](=[O:17])[C:4]=2[CH:3]=1)=[CH:13][CH:12]=[C:11]([Cl:18])[CH:10]=4.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.[CH3:43][C:44]1([CH3:51])[O:48][C@H:47]([CH2:49]O)[CH2:46][O:45]1.C1(C)C=CC=CC=1.C(OC(N=NC(OCC)=O)=O)C>C1COCC1>[Cl:18][C:11]1[CH:10]=[C:9]2[C:14]([C:15]3[C:16](=[O:17])[C:4]4[CH:3]=[C:2]([Br:1])[C:22]([O:23][CH2:49][C@H:47]5[CH2:46][O:45][C:44]([CH3:51])([CH3:43])[O:48]5)=[CH:21][C:5]=4[C:6]([CH3:20])([CH3:19])[C:7]=3[NH:8]2)=[CH:13][CH:12]=1

Participants

Conditions

Temperature: 40 °C

Procedure

Under nitrogen atmosphere, 9-bromo-3-chloro-8-hydroxy-6,6-dimethyl-5,6-dihydro-benzo[b]carbazol-11-one (Compound S2-4, 112 mg, 0.29 mmol) and triphenylphosphine (227 mg, 3 eq.) were added with THF (2 ml), and ((R)-2,2-dimethyl-[1,3]dioxolan-4-yl)-methanol (114 mg, 3 eq.) and 2.19 N toluene solution (0.4 mL, 3 eq.) of diethyl azodicarboxylic acid were added dropwise thereto, followed by stirring at 40° C. for 12 hr under nitrogen atmosphere. The residues obtained from the reaction solution after concentration under reduced pressure were purified by silica gel column chromatography (ethyl acetate/dichloromethane) to obtain the title compound (white powder, 100 mg).

Workup

additionwere added dropwise
customThe residues obtained from the reaction solution
concentrationafter concentration under reduced pressure
customwere purified by silica gel column chromatography (ethyl acetate/dichloromethane)

Sources & evidence

ORD record: ord-6aad72284c7c4a32a5049efbfa4834e1
Source dataset: uspto-grants-2016_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09440922B2

Linked notes

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