Water → HCID 86687347, compound

HRID 1473288Notes

Reaction equation

HRID 1473288 reaction equation
[CH3:1][O:2][C:3]1[CH:37]=[C:36]([O:38][CH3:39])[CH:35]=[CH:34][C:4]=1[CH2:5][N:6]([C:29]1[S:33][N:32]=[CH:31][N:30]=1)[S:7]([C:10]1[CH:19]=[CH:18][C:17]2[C:12](=[CH:13][CH:14]=[CH:15][C:16]=2B2OC(C)(C)C(C)(C)O2)[CH:11]=1)(=[O:9])=[O:8].[Br:40][C:41]1[CH:46]=[C:45]([Cl:47])[CH:44]=[CH:43][C:42]=1I.C(=O)([O-])[O-].[Na+].[Na+].O>C(O)(C)(C)C.O1CCOCC1>[Br:40][C:41]1[CH:46]=[C:45]([Cl:47])[CH:44]=[CH:43][C:42]=1[C:16]1[CH:15]=[CH:14][CH:13]=[C:12]2[C:17]=1[CH:18]=[CH:19][C:10]([S:7]([N:6]([CH2:5][C:4]1[CH:34]=[CH:35][C:36]([O:38][CH3:39])=[CH:37][C:3]=1[O:2][CH3:1])[C:29]1[S:33][N:32]=[CH:31][N:30]=1)(=[O:9])=[O:8])=[CH:11]2

Participants

7

Reactant 4

HCID 962WaterHCID 10340Sodium CarbonateHCID 137413262-Bromo-4-chloro-1-iodobenzeneHCID 86687343N-(2,4-dimethoxybenzyl)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-N-(1,2,4-thiadiazol-5-yl)naphthalene-2 sulfonamide2×

Product 1

HCID 86687347HCID 86687347, compound

Reagents, catalysts & solvents 2

HCID 6386tert-ButanolSolventHCID 312751,4-DioxaneSolvent

Conditions

Temperature
50 °C

Procedure

A pressure vessel was charged with N-(2,4-dimethoxybenzyl)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-N-(1,2,4-thiadiazol-5-yl)naphthalene-2-sulfonamide (Intermediate E) (5.00 g, 8.81 mmol), 2-bromo-4-chloro-1-iodobenzene (5.59 g, 17.6 mmol) and Pd(dppf) Cl2 DCM (1.44 g, 1.76 mmol). Dioxane (44.1 mL) and t-butanol (44.1 mL) were added to the reaction vial followed by 1.9 M sodium carbonate in water (13.9 mL, 26.4 mmol). The reaction vial was then swept with nitrogen and sealed with a screw cap. The reaction mixture was stirred and sonicated for 5 min. The resulting light red mixture was then heated to 50° C. After 2 h, LC/MS indicated about 90% conversion of boronic ester to the desired product as [M+Na]+=652. The mixture was cooled to room temperature and filtered through a fritted funnel with EtOAc (150 mL). The filtrate was washed with brine. The organic layers were combined, dried with MgSO4, filtered and concentrated to afford a black oil. The mixture was purified by MPLC (300 g silica gel column eluting with 0 to 50% EtOAc:Heptane) to afford a white solid. MS (ESI): 651.8 [M+Na]+; 1H NMR (400 MHz, DMSO-d6) δ ppm 3.64 (s, 3H), 3.66 (s, 3H), 5.18 (d, J=16 Hz, 1H), 5.24 (d, J=16 Hz, 1H), 6.31-6.41 (m, 2H), 6.95-7.04 (d, J=9 Hz, 1H), 7.46 (d, J=8.3 Hz, 1H), 7.50 (d, J=8.9 Hz, 1H), 7.64 (d, J=6.1 Hz, 2H), 7.78-7.80 (m, 2H), 7.98 (d, J=2.25 Hz, 1H), 8.30 (d, J=9.4 Hz, 1H), 8.38 (s, 1H), 8.65 (m, 1H).

Workup

  1. customsealed with a screw
  2. customcap
  3. customsonicated for 5 min

Sources & evidence

ORD record
ord-8e8d8283bcd747269225089dc61c08d9
Source dataset
uspto-grants-2015_04
Patent number
US09012443B2

Reaction notes

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