Triphenylphosphine → HCID 22507731, compound

HRID 985792Notes

Reaction equation

Br[C:2]1[CH:3]=[C:4]([CH:25]=[CH:26][N:27]=1)[C:5]([NH:7][C:8]1[S:9][C:10]2[C:16]([CH:17]3[CH2:22][O:21][CH2:20][CH2:19][O:18]3)=[CH:15][CH:14]=[C:13]([O:23][CH3:24])[C:11]=2[N:12]=1)=[O:6].C([Sn](CCCC)(CCCC)[C:33]1[CH2:34][CH2:35][O:36][CH2:37][CH:38]=1)CCC.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.[Cl-].[Li+].C(C1C=C(C)C=C(C(C)(C)C)C=1O)(C)(C)C>CN(C=O)C.Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1>[O:36]1[CH2:35][CH:34]=[C:33]([C:2]2[CH:3]=[C:4]([CH:25]=[CH:26][N:27]=2)[C:5]([NH:7][C:8]2[S:9][C:10]3[C:16]([CH:17]4[CH2:22][O:21][CH2:20][CH2:19][O:18]4)=[CH:15][CH:14]=[C:13]([O:23][CH3:24])[C:11]=3[N:12]=2)=[O:6])[CH2:38][CH2:37]1

Participants

Conditions

Temperature: 100 °C

Procedure

To a stirred solution of 180 mg (0.40 mmol) (±)-2-bromo-N-(7-[1,4]dioxan-2-yl-4-methoxy-benzothiazol-2-yl)-isonicotinamide in 10 ml DMF were added 298 mg (0.80 mmol) tributyl-(3,6-dihydro-2H-pyran-4-yl)-stannane, 34 mg (0.05 mmol) bis(triphenylphosphine)palladium(II) chloride, 63 mg (0.24 mmol) triphenylphosphine, 136 mg (3.20 mmol) lithium chloride and a small spatula-end of 2,6-di-tert-butyl-4-methylphenol. The mixture was heated at 100° C. for 24 h and then concentrated in vacuo. Flash chromatography (ethyl acetate) afforded 140 mg (77%) (±)-2-(3,6-dihydro-2H-pyran-4-yl)-N-(7-[1,4]dioxan-2-yl-4-methoxy-benzothiazol-2-yl)-isonicotinamide as an off-white solid. ES-MS m/e (%): 454 (M+H+, 100).

Workup

concentrationconcentrated in vacuo

Sources & evidence

ORD record: ord-2c229a0ef3b1403aa0a04ff52bf559ce
Source dataset: uspto-grants-2005_03
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06872833B2

Reaction notes

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