Sodium Carbonate → (Z)-N-(1-(4-bromophenyl)-1-(3-thienyl)prop-1-en-3-yl)sarcosine

HRID 433276Notes

Reaction equation

[Br:1][C:2]1[CH:7]=[CH:6][C:5](/[C:8](/I)=[CH:9]/[CH2:10][N:11]([CH2:13][C:14]([OH:16])=[O:15])[CH3:12])=[CH:4][CH:3]=1.[S:18]1[CH:22]=[CH:21][C:20](B(O)O)=[CH:19]1.C([O-])([O-])=O.[Na+].[Na+]>C(COC)OC.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[Br:1][C:2]1[CH:7]=[CH:6][C:5](/[C:8](/[C:20]2[CH:21]=[CH:22][S:18][CH:19]=2)=[CH:9]/[CH2:10][N:11]([CH2:13][C:14]([OH:16])=[O:15])[CH3:12])=[CH:4][CH:3]=1

Participants

Conditions

Temperature: 90 °C

Procedure

To a solution of (Z)-N-(1-(4-bromophenyl)-1-iodoprop-1-en-3-yl)sarcosine, tbutyl ester D (29.86 g, 64.06 mmol) in dimethoxyethane (300 mL) was added 3-thiopheneboronic acid (9.02 g, 70.47 mmol), Pd(PPh3)4 (3.70 g, 3.20 mmol), and 2M Na2CO3 (300 mL). The reaction was warmed to 90° C. with vigorous mechanical stirring for 4.5 hours. The mixture was cooled, and partitioned between EtOAc and water. The organic phase was washed with brine, dried (MgSO4), filtered, and concentrated. Column chromatography (2-5% acetone/hexanes) provided (Z)-N-(1-(4-bromophenyl)-1-(3-thienyl)prop-1-en-3-yl)sarcosine, tbutyl ester E(i) (27.06 g, 78%) as a yellow oil. 1H NMR (300 MHz, CDCl3) 1.43 (s, 9H), 2.36 (s, 3H), 3.14 (s, 2H), 3.28 (d, 2H), 6.16 (7, 1H), 6.86 (d, 1H), 7.12-7.14 (m, 3H), 7.32 (collapsed dd, 1H), 7.41 (d, 2H).

Workup

temperatureThe mixture was cooled
custompartitioned between EtOAc and water
washThe organic phase was washed with brine
dry with materialdried (MgSO4)
filtrationfiltered
concentrationconcentrated

Sources & evidence

ORD record: ord-96971c04564c428b9ac37acd34e9065e
Source dataset: uspto-grants-2003_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06667336B2

Reaction notes

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