Diisopropylethylamine → 4-(5-[(4-Fluorophenyl)methyl]-6-methylpyrimidin-4-yl)-7-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,3,4,5-tetrahydro-1,4-benzoxazepine

HRID 241170Notes

Reaction equation

HRID 241170 reaction equation
FC(F)(F)C(O)=O.[CH3:8][C:9]1([CH3:27])[C:13]([CH3:15])([CH3:14])[O:12][B:11]([C:16]2[CH:17]=[CH:18][C:19]3[O:25][CH2:24][CH2:23][N:22]=[CH:21][C:20]=3[CH:26]=2)[O:10]1.Cl[C:29]1[C:34]([CH2:35][C:36]2[CH:41]=[CH:40][C:39]([F:42])=[CH:38][CH:37]=2)=[C:33]([CH3:43])[N:32]=[CH:31][N:30]=1.C(N(CC)C(C)C)(C)C>CN1CCCC1=O>[F:42][C:39]1[CH:38]=[CH:37][C:36]([CH2:35][C:34]2[C:29]([N:22]3[CH2:21][C:20]4[CH:26]=[C:16]([B:11]5[O:10][C:9]([CH3:27])([CH3:8])[C:13]([CH3:14])([CH3:15])[O:12]5)[CH:17]=[CH:18][C:19]=4[O:25][CH2:24][CH2:23]3)=[N:30][CH:31]=[N:32][C:33]=2[CH3:43])=[CH:41][CH:40]=1

Participants

5

Reactant 3

HCID 81531DiisopropylethylamineHCID 668206407-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)-2,3-dihydro-1,4-benzoxazepine trifluoroacetate saltHCID 866478404-Chloro-5-(4-fluorobenzyl)-6-methylpyrimidine

Product 1

HCID 668205164-(5-[(4-Fluorophenyl)methyl]-6-methylpyrimidin-4-yl)-7-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,3,4,5-tetrahydro-1,4-benzoxazepineYield 42%

Reagents, catalysts & solvents 1

HCID 13387N-methyl-2-pyrrolidoneSolvent

Procedure

A mixture of 7-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,3-dihydro-1,4-benzoxazepine trifluoroacetate salt (2.9 g, 8.00 mmol, 4-chloro-5-[(4-fluorophenyl)methyl]-6-methylpyrimidine (reagent preparation 5) (1.9 g, 8.00 mmol) and N,N-diisopropylethylamine (7.0 mL, 40.0 mmol) in N-methyl-2-pyrrolidone (10 mL) was reacted in a microwave apparatus (250 W) for 2 h at 150° C. After cooling to room temperature the reaction mixture was partitioned between ethyl acetate (500 mL) and brine (100 mL). The organic layer was separated, washed with brine (100 mL), dried over sodium sulfate then filtered and concentrated. Column chromatography of the residue on silica (gradient 20 to 40% ethyl acetate in hexane) gave 4-{5-[(4-fluorophenyl)methyl]-6-methylpyrimidin-4-yl}-7-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,3,4,5-tetrahydro-1,4-benzoxazepine (1.6 g, 42% yield). 1H NMR (400 MHz, DMSO-D6): 8.58 (s, 1H), 7.62 (dd, 1H), 7.08 (m, 4H), 7.02 (d, 1H), 6.96 (d, 1H), 4.36 (s, 2H), 4.30 (m, 2H), 3.92 (s, 2H), 3.84 (m, 2H), 2.26 (s, 3H), 1.36 (s, 12H); MS (EI) for C27H31BFN3O3: 476 (MH+).

Workup

  1. customwas reacted in a microwave apparatus (250 W) for 2 h at 150° C
  2. customwas partitioned between ethyl acetate (500 mL) and brine (100 mL)
  3. customThe organic layer was separated
  4. washwashed with brine (100 mL)
  5. dry with materialdried over sodium sulfate
  6. filtrationthen filtered
  7. concentrationconcentrated

Sources & evidence

ORD record
ord-581438f99b2f4abf81c076b4e4397c62
Source dataset
uspto-grants-2014_02
Patent number
US08648066B2

Reaction notes

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