Tri-o-tolylphosphine → (1R*,2S*)-2-(3-((E)-2-(2-methylpyridin-4-yl)vinyl)-1H-indazol-6-yl) spiro[cyclopropane-1,3'-indolin]-2'-one

HRID 447563Notes

Reaction equation

HRID 447563 reaction equation
[CH:1]([C:3]1[C:11]2[C:6](=[CH:7][C:8]([C@H:12]3[C@@:14]4([C:22]5[C:17](=[CH:18][CH:19]=[CH:20][CH:21]=5)[NH:16][C:15]4=[O:23])[CH2:13]3)=[CH:9][CH:10]=2)[NH:5][N:4]=1)=[CH2:2].Br[C:25]1[CH:30]=[CH:29][N:28]=[C:27]([CH3:31])[CH:26]=1.CCN(C(C)C)C(C)C.CC1C=CC=CC=1P(C1C=CC=CC=1C)C1C=CC=CC=1C>CN(C=O)C.CC([O-])=O.CC([O-])=O.[Pd+2]>[CH3:31][C:27]1[CH:26]=[C:25](/[CH:2]=[CH:1]/[C:3]2[C:11]3[C:6](=[CH:7][C:8]([C@H:12]4[C@@:14]5([C:22]6[C:17](=[CH:18][CH:19]=[CH:20][CH:21]=6)[NH:16][C:15]5=[O:23])[CH2:13]4)=[CH:9][CH:10]=3)[NH:5][N:4]=2)[CH:30]=[CH:29][N:28]=1

Participants

7

Reactant 4

HCID 80271Tri-o-tolylphosphineHCID 81531DiisopropylethylamineHCID 27628354-Bromo-2-methylpyridineHCID 68760231(1R*,2S*)-2-(3-vinyl-1H-indazol-6-yl)spiro[cyclopropane-1,3'-indolin]-2'-one

Product 1

HCID 58486293(1R*,2S*)-2-(3-((E)-2-(2-methylpyridin-4-yl)vinyl)-1H-indazol-6-yl) spiro[cyclopropane-1,3'-indolin]-2'-oneYield 29.3%

Reagents, catalysts & solvents 2

HCID 167845palladium(II) acetateCatalystHCID 6228DimethylformamideSolvent

Procedure

To a mixture of (1R*,2S*)-2-(3-vinyl-1H-indazol-6-yl)spiro[cyclopropane-1,3′-indolin]-2′-one (60.2 mg, 0.2 mmol) and 4-bromo-2-methylpyridine (34.4 mg, 0.2 mmol) in DMF (2 mL) was added iPr2NEt (0.07 mL), followed by Pd(OAc)2 (2.2 mg, 0.01 mmol) and P(o-tol)3 (6.7 mg, 0.022 mmol). The resulting mixture was purged with argon, and then microwaved 2 h at 125° C. Purification by prep-HPLC gave the title compound as a yellow solid (23 mg, 23%). NMR indicated 7% of the branched isomer. 1H NMR (400 MHz, CD3OD) 8.53 (d, J=6.4 Hz, 1H), 8.13-8.03 (m, 4H), 7.59 (d, J=16.4 Hz, 1H), 7.53 (s, 1H), 7.10 (d, J=8.4 Hz, 1H), 7.05 (t, J=7.6 Hz, 1H), 6.94 (d, J=8.4 Hz, 1H), 6.56 (t, J=7.6 Hz, 1H), 5.97 (d, J=7.6 Hz, 1H), 3.56 (t, J=8.0 Hz, 1H), 2.77 (s, 3H), 2.25 (dd, J=7.6 Hz, J=4.8 Hz, 1H), 2.18 (dd, J=9.2 Hz, 4.8 Hz, 1H); MS ESI 393.2 [M+H]+, calcd for [C25H20N4O+H]+ 393.2.

Workup

  1. customThe resulting mixture was purged with argon
  2. custommicrowaved 2 h at 125° C
  3. customPurification

Sources & evidence

ORD record
ord-0a3260957c02412eb913dc598748f1b3
Source dataset
uspto-grants-2013_07
Patent number
US08481525B2

Reaction notes

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