Stannane, tributyl(1-ethoxyethenyl)- → 6-acetyl-3-(3,4-dimethoxybenzyl)-1-(tetrahydro-2H-pyran-4-yl)-quinazoline-2,4(1H,3H)-dione

HRID 1022494Notes

Reaction equation

HRID 1022494 reaction equation
[CH3:1][O:2][C:3]1[CH:4]=[C:5]([CH:26]=[CH:27][C:28]=1[O:29][CH3:30])[CH2:6][N:7]1[C:16](=[O:17])[C:15]2[C:10](=[CH:11][CH:12]=[C:13](I)[CH:14]=2)[N:9]([CH:19]2[CH2:24][CH2:23][O:22][CH2:21][CH2:20]2)[C:8]1=[O:25].C([Sn](CCCC)(CCCC)[C:36]([O:38]CC)=[CH2:37])CCC>C1(C)C=CC=CC=1.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>[C:36]([C:13]1[CH:14]=[C:15]2[C:10](=[CH:11][CH:12]=1)[N:9]([CH:19]1[CH2:20][CH2:21][O:22][CH2:23][CH2:24]1)[C:8](=[O:25])[N:7]([CH2:6][C:5]1[CH:26]=[CH:27][C:28]([O:29][CH3:30])=[C:3]([O:2][CH3:1])[CH:4]=1)[C:16]2=[O:17])(=[O:38])[CH3:37]

Participants

5

Reactant 2

HCID 619414Stannane, tributyl(1-ethoxyethenyl)-HCID 497645323-(3,4-dimethoxybenzyl)-6-iodo-1-(tetrahydro-2H-pyran-4-yl)-quinazoline-2,4(1H,3H)-dione

Product 1

HCID 497644036-acetyl-3-(3,4-dimethoxybenzyl)-1-(tetrahydro-2H-pyran-4-yl)-quinazoline-2,4(1H,3H)-dione

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 1140TolueneSolvent

Conditions

Temperature
130 °C

Procedure

A mixture of 1 g of 3-(3,4-dimethoxybenzyl)-6-iodo-1-(tetrahydro-2H-pyran-4-yl)-quinazoline-2,4(1H,3H)-dione, 1.3 ml of tributyl(1-ethoxyvinyl)tin and 0.04 g of Pd(PPh3)4 in 20 ml of toluene is heated for 1 hour at 130° C. and then stirred for 48 hours at room temperature. The solvent is evaporated off under reduced pressure. The residue is taken up in EtOAc and washed four times with 4N HCl and then with water. The organic phase is dried over Na2SO4, filtered and evaporated under reduced pressure. The residue is chromatographed on silica gel, eluting with a DCM/EtOAc mixture from (80/20, v/v) to give 0.84 g of the expected product.

Workup

  1. customThe solvent is evaporated off under reduced pressure
  2. washwashed four times with 4N HCl
  3. dry with materialThe organic phase is dried over Na2SO4
  4. filtrationfiltered
  5. customevaporated under reduced pressure
  6. customThe residue is chromatographed on silica gel
  7. washeluting with a DCM/EtOAc mixture from (80/20

Sources & evidence

ORD record
ord-0b8ade7b13174518b2cd4dfe7aef7b17
Source dataset
uspto-grants-2014_05
Patent number
US08722659B2

Reaction notes

Loading…