4-Benzyloxy-phenylboronic acid → 2'-amino-6-(4-(benzyloxy)phenyl)-1'-methyl-2-phenylspiro[chroman-4,4'-imidazol]-5'(1'H)-one

HRID 2096588Notes

Reaction equation

[NH2:1][C:2]1[N:3]([CH3:24])[C:4](=[O:23])[C:5]2([C:15]3[C:10](=[CH:11][CH:12]=[C:13](Br)[CH:14]=3)[O:9][CH:8]([C:17]3[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=3)[CH2:7]2)[N:6]=1.[CH2:25]([O:32][C:33]1[CH:38]=[CH:37][C:36](B(O)O)=[CH:35][CH:34]=1)[C:26]1[CH:31]=[CH:30][CH:29]=[CH:28][CH:27]=1>O1CCOCC1.C([O-])([O-])=O.[Cs+].[Cs+].Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1>[NH2:1][C:2]1[N:3]([CH3:24])[C:4](=[O:23])[C:5]2([C:15]3[C:10](=[CH:11][CH:12]=[C:13]([C:36]4[CH:37]=[CH:38][C:33]([O:32][CH2:25][C:26]5[CH:31]=[CH:30][CH:29]=[CH:28][CH:27]=5)=[CH:34][CH:35]=4)[CH:14]=3)[O:9][CH:8]([C:17]3[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=3)[CH2:7]2)[N:6]=1

Participants

Conditions

Temperature: 120 °C

Procedure

Pd(PPh3)2Cl2 (10 mg, 0.01 mmol) in a 10 mL of flask under Ar2 was treated sequentially with 2′-amino-6-bromo-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (20 mg, 0.052 mmol) in 1,4-dioxane (1 mL), Cs2CO3 (2 N, 0.3 mL) and 4-(benzyloxy)phenylboronic acid (24 mg, 0.104 mmol). The mixture was heated under 120° C. at Ar2 under microwave for 30 minutes. The reaction mixture was concentrated in vacuo to give the residue, which was purified preparative TLC and HPLC to give 2′-amino-6-(4-(benzyloxy)phenyl)-1′-methyl-2-phenylspiro[chroman-4,4′-imidazol]-5′(1′H)-one (1.75 mg, 7%). 1H-NMR (MeOD): 2.46 (m, 1H), 2.59 (m, 1H), 3.29 (s, 3H), 5.12 (s, 2H), 5.83 (m, 1H), 7.04 (m, 2H), 7.09 (m, 1H), 7.31 (m, 1H), 7.38 (m, 4H), 7.45 (m, 4H), 7.50 (m, 4H), 7.56 (m, 1H).

Workup

concentrationThe reaction mixture was concentrated in vacuo
customto give the residue, which
customwas purified preparative TLC and HPLC

Sources & evidence

ORD record: ord-e1295717cbe84de8aa34ea58c4592b70
Source dataset: uspto-grants-2013_05
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08450308B2

Reaction notes

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