Formaldehyde → 6,6-Dimethyl-2-{6-[n-methyl-n-(6-methylpyridin-3-yl)amino]-2,3-dihydro-4h-1,4-benzoxazin-4-yl}-6,7-dihydro[1,3]thiazolo[5,4-c]pyridin-4(5h)-one

HRID 885971Notes

Reaction equation

HRID 885971 reaction equation
[CH3:1][C:2]1([CH3:30])[NH:7][C:6](=[O:8])[C:5]2[S:9][C:10]([N:12]3[C:17]4[CH:18]=[C:19]([NH:22][C:23]5[CH:24]=[N:25][C:26]([CH3:29])=[CH:27][CH:28]=5)[CH:20]=[CH:21][C:16]=4[O:15][CH2:14][CH2:13]3)=[N:11][C:4]=2[CH2:3]1.C=O.[CH2:33]([Sn](Cl)(Cl)CCCC)CCC.C1([SiH3])C=CC=CC=1>C1COCC1>[CH3:1][C:2]1([CH3:30])[NH:7][C:6](=[O:8])[C:5]2[S:9][C:10]([N:12]3[C:17]4[CH:18]=[C:19]([N:22]([CH3:33])[C:23]5[CH:24]=[N:25][C:26]([CH3:29])=[CH:27][CH:28]=5)[CH:20]=[CH:21][C:16]=4[O:15][CH2:14][CH2:13]3)=[N:11][C:4]=2[CH2:3]1

Participants

6

Reactant 4

HCID 712FormaldehydeHCID 12688Dibutyltin dichlorideHCID 12752PhenylsilaneHCID 671856026,6-Dimethyl-2-[6-(6-methylpyridin-3-ylamino)-2,3-dihydrobenzo[1,4]oxazin-4-yl]-6,7-dihydro[1,3]thiazolo[5,4-c]pyridin-4(5h)-one

Product 1

HCID 671903716,6-Dimethyl-2-{6-[n-methyl-n-(6-methylpyridin-3-yl)amino]-2,3-dihydro-4h-1,4-benzoxazin-4-yl}-6,7-dihydro[1,3]thiazolo[5,4-c]pyridin-4(5h)-oneYield 1,148%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

A stirred solution of Example 60 (0.017 g, 0.04 mmol), paraformaldehyde (0.04 g, 0.28 mmol), dibutyltin dichloride (0.0015 g, 0.004 mmol) and phenyl silane (0.01 g, 0.08 mmol) in THF (4 mL) was heated to 100° C. under microwave irradiation in a sealed tube for 1 h. The reaction mixture was concentrated in vacuo. Purification by preparative HPLC (Method 7) gave the title compound (0.020 g, 34%) as an off-white solid. δH (CDCl3) 8.20 (1H, d, J 2.8 Hz), 7.70 (1H, d, J 2.5 Hz), 7.16 (1H, d, J 8.5 Hz), 7.05-6.99 (1H, m), 6.93-6.87 (1H, m), 6.78 (1H, dd, J 8.7 and 2.5 Hz), 5.15 (1H, s), 4.36-4.29 (2H, m), 4.18-4.10 (2H, m), 3.20 (3H, s), 2.80 (2H, s), 2.50 (3H, s), 1.40 (6H, s). LCMS (ES+) 436 (M+H)+, RT 3.30 minutes (Method 2).

Workup

  1. concentrationThe reaction mixture was concentrated in vacuo
  2. customPurification by preparative HPLC (Method 7)

Sources & evidence

ORD record
ord-c3ff64e86f364a3eb73c2d7de2a721ee
Source dataset
uspto-grants-2012_08
Patent number
US08242116B2

Reaction notes

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