2-(Dicyclohexylphosphino)biphenyl → 6-((R)-1-(5-(thiazol-4-yl)isoxazolo[5,4-b]pyridin-3-yl)ethyl)quinoline

HRID 40341Notes

Reaction equation

C1(P(C2CCCCC2)C2C=CC=CC=2C2C=CC=CC=2)CCCCC1.Br[C:27]1[CH:28]=[C:29]2[C:35]([CH:36]([C:38]3[CH:39]=[C:40]4[C:45](=[CH:46][CH:47]=3)[N:44]=[CH:43][CH:42]=[CH:41]4)[CH3:37])=[N:34][O:33][C:30]2=[N:31][CH:32]=1.C([Sn](CCCC)(CCCC)[C:53]1[N:54]=[CH:55][S:56][CH:57]=1)CCC>CN(C=O)C>[S:56]1[CH:57]=[C:53]([C:27]2[CH:28]=[C:29]3[C:35]([C@@H:36]([C:38]4[CH:39]=[C:40]5[C:45](=[CH:46][CH:47]=4)[N:44]=[CH:43][CH:42]=[CH:41]5)[CH3:37])=[N:34][O:33][C:30]3=[N:31][CH:32]=2)[N:54]=[CH:55]1

Participants

Conditions

Temperature: 90 °C

Procedure

To a pressure vessel was added 2-(dicyclohexylphosphino)biphenyl (12 mg, 0.42 mmol), 6-(1-(5-bromoisoxazolo[5,4-b]pyridin-3-yl)ethyl)quinoline (0.10 g, 0.28 mmol), 4-(tributylstannyl)thiazole (0.16 g, 0.42 mmol) in anhydrous DMF (3 mL). The vial was flushed with argon, sealed and stirred at 90° C. for two hours. The mixture was concentrated and purified by MPLC (eluted with a gradient of 0 to 10% methanol in dichloromethane) to yield the racemic product as an off-white solid. The desired enantiomer (>99% ee) was obtained via SFC. MS m/z=359.0 [M+1]+ Calc'd for C20H14N4OS: 358.4

Workup

customThe vial was flushed with argon
customsealed
concentrationThe mixture was concentrated
custompurified by MPLC (
washeluted with a gradient of 0 to 10% methanol in dichloromethane)

Sources & evidence

ORD record: ord-910158b84daa42a0975dafd4e16f0c10
Source dataset: uspto-grants-2013_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08524900B2

Reaction notes

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