Nicotinic Acid → HCID 178493819, compound

HRID 536216Notes

Reaction equation

HRID 536216 reaction equation
[CH2:1]([O:8][C:9]1[CH:10]=[CH:11][C:12]2[C:13]3[N:14]([CH2:22][CH2:23][N:24]=3)[C:15]([NH2:21])=[N:16][C:17]=2[C:18]=1[O:19][CH3:20])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[C:25](O)(=[O:32])[C:26]1[CH:31]=[CH:30][CH:29]=[N:28][CH:27]=1.C(N(C(C)C)CC)(C)C.C1CN([P+](ON2N=NC3C=CC=CC2=3)(N2CCCC2)N2CCCC2)CC1.F[P-](F)(F)(F)(F)F>CN(C=O)C>[CH2:1]([O:8][C:9]1[CH:10]=[CH:11][C:12]2[C:13]3[N:14]([CH2:22][CH2:23][N:24]=3)[C:15]([NH:21][C:25](=[O:32])[C:26]3[CH:31]=[CH:30][CH:29]=[N:28][CH:27]=3)=[N:16][C:17]=2[C:18]=1[O:19][CH3:20])[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Participants

6

Reactant 4

HCID 938Nicotinic AcidHCID 81531DiisopropylethylamineHCID 2724699PyBOPHCID 1784938207-methoxy-8-phenylmethoxy-2,3-dihydroimidazo[1,2-c]quinazolin-5-amine2×

Product 1

HCID 178493819HCID 178493819, compound

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

8-(Benzyloxy)-7-methoxy-2,3-dihydroimidazo[1,2-c]quinazolin-5-amine (Intermediate A, Step 7, 21 g, 65 mmol) and nicotinic acid (12 g, 97.7 mmol) were suspended in DMF (240 mL). Diisopropylethylamine (33.7 g, 260.4 mmol) and then PyBOP (51 g, 97.7 mmol) were added and the resulting mixture stirred with overhead stirring for 3 days at ambient temperature. At this time, the resultant precipitate was isolated by vacuum filtration. After repeated washing with EtOAc, the material was dried under vacuum with slight heating to yield the title compound (27.3 g, 98%): HPLC MS RT=1.09 min, MH+=481.2; 1H NMR (DMSO-d6+2 drops TFA-d) δ: 9.32 (1H, s), 8.89 (1H, br m), 8.84 (1H, d), 7.89 (1H, br m), 7.82 (1H, d), 7.37 (1H, d), 7.27 (1H, d), 7.16 (6H, m), 5.18 (2H, s), 4.36 (2H, t), 4.04 (2H, t), 3.78 (3H, s).

Workup

  1. stirringstirring for 3 days at ambient temperature

Sources & evidence

ORD record
ord-9198329698384493b7ed28916d9368b2
Source dataset
uspto-grants-2014_10
Patent number
US08859572B2

Reaction notes

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