Sodium Bicarbonate → 1,1-Dimethylethyl {1-[2-(6-chloro-1-oxido-3-oxo-1,2,4-benzotriazin-4(3H)-yl)ethyl]-4-piperidinyl}(2,3-dihydro[1,4]dioxino[2,3-c]pyridin-7-ylmethyl)carbamate

HRID 657021Notes

Reaction equation

HRID 657021 reaction equation
[Cl:1][C:2]1[CH:3]=[CH:4][C:5]2[N+:10]([O-:11])=[N:9][C:8](=[O:12])[N:7]([CH2:13][CH:14]=O)[C:6]=2[CH:16]=1.[O:17]1[C:26]2[CH:25]=[C:24]([CH2:27][N:28]([CH:36]3[CH2:41][CH2:40][NH:39][CH2:38][CH2:37]3)[C:29](=[O:35])[O:30][C:31]([CH3:34])([CH3:33])[CH3:32])[N:23]=[CH:22][C:21]=2[O:20][CH2:19][CH2:18]1.[BH-](OC(C)=O)(OC(C)=O)OC(C)=O.[Na+].C([O-])(O)=O.[Na+]>C(Cl)(Cl)Cl.CO>[Cl:1][C:2]1[CH:3]=[CH:4][C:5]2[N+:10]([O-:11])=[N:9][C:8](=[O:12])[N:7]([CH2:13][CH2:14][N:39]3[CH2:38][CH2:37][CH:36]([N:28]([CH2:27][C:24]4[N:23]=[CH:22][C:21]5[O:20][CH2:19][CH2:18][O:17][C:26]=5[CH:25]=4)[C:29](=[O:35])[O:30][C:31]([CH3:33])([CH3:34])[CH3:32])[CH2:41][CH2:40]3)[C:6]=2[CH:16]=1

Participants

7

Reactant 4

HCID 516892Sodium BicarbonateHCID 5049666Sodium triacetoxyborohydrideHCID 578154611,1-Dimethylethyl (2,3-dihydro[1,4]dioxino[2,3-c]pyridin-7-ylmethyl)-4-piperidinylcarbamateHCID 86635335(6-Chloro-1-oxido-3-oxo-1,2,4-benzotriazin-4(3H)-yl)acetaldehyde

Product 1

HCID 866353361,1-Dimethylethyl {1-[2-(6-chloro-1-oxido-3-oxo-1,2,4-benzotriazin-4(3H)-yl)ethyl]-4-piperidinyl}(2,3-dihydro[1,4]dioxino[2,3-c]pyridin-7-ylmethyl)carbamateYield 42%

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 6212ChloroformSolvent

Procedure

A mixture of (6-chloro-1-oxido-3-oxo-1,2,4-benzotriazin-4(3H)-yl)acetaldehyde (89 mg, 0.372 mmol) and 1,1-dimethylethyl (2,3-dihydro[1,4]dioxino[2,3-c]pyridin-7-ylmethyl)-4-piperidinylcarbamate (for a synthesis see WO2004/058144 Example 99(h)) (117 mg, 0.334 mmol) in chloroform (5 ml) and MeOH (0.5 ml) was stirred for 2 h before addition of NaBH(OAc)3 (212 mg, 1.002 mmol). The reaction was stirred for 1 h before addition of sat. aq NaHCO3 (50 ml). The reaction was then extracted with 10% MeOH in DCM (3×200 ml). The combined organic phases were dried, evaporated and the crude residue purified by chromatography on silica gel using a 0-10% MeOH/DCM gradient to provide the desired compound as a yellow oil (81 mg, 42%).

Workup

  1. extractionThe reaction was then extracted with 10% MeOH in DCM (3×200 ml)
  2. customThe combined organic phases were dried
  3. customevaporated
  4. customthe crude residue purified by chromatography on silica gel using a 0-10% MeOH/DCM gradient

Sources & evidence

ORD record
ord-9f37464c3100467f804c52c46c4aefcc
Source dataset
uspto-grants-2011_12
Patent number
US08071592B2

Reaction notes

Loading…