Diisopropylethylamine → (R)-4-(4-((6-oxo-5,6,6a,7,9,10-hexahydropyrido[3,2-e][1,4]thiazino[4,3-a]pyrazin-3-yl)methyl)piperazin-1-yl)benzonitrile

HRID 1644965Notes

Reaction equation

HRID 1644965 reaction equation
O[CH2:2][C:3]1[CH:12]=[N:11][C:10]2[N:9]3[CH2:13][CH2:14][S:15][CH2:16][C@H:8]3[C:7](=[O:17])[NH:6][C:5]=2[CH:4]=1.[I-].C(C[P+](C)(C)C)#N.C(N(C(C)C)C(C)C)C.[N:35]1([C:41]2[CH:48]=[CH:47][C:44]([C:45]#[N:46])=[CH:43][CH:42]=2)[CH2:40][CH2:39][NH:38][CH2:37][CH2:36]1>C(#N)CC>[O:17]=[C:7]1[NH:6][C:5]2[CH:4]=[C:3]([CH2:2][N:38]3[CH2:37][CH2:36][N:35]([C:41]4[CH:42]=[CH:43][C:44]([C:45]#[N:46])=[CH:47][CH:48]=4)[CH2:40][CH2:39]3)[CH:12]=[N:11][C:10]=2[N:9]2[CH2:13][CH2:14][S:15][CH2:16][C@@H:8]12

Participants

6

Reactant 4

HCID 81531DiisopropylethylamineHCID 27339954-(Piperazin-1-yl)benzonitrileHCID 10514344(Cyanomethyl)trimethylphosphanium iodideHCID 58324367(R)-3-(hydroxymethyl)-6a,7,9,10-tetrahydropyrido[3,2-e][1,4]thiazino[4,3-a]pyrazin-6(5H)-one

Product 1

HCID 46864478(R)-4-(4-((6-oxo-5,6,6a,7,9,10-hexahydropyrido[3,2-e][1,4]thiazino[4,3-a]pyrazin-3-yl)methyl)piperazin-1-yl)benzonitrileYield 26.9%

Reagents, catalysts & solvents 1

HCID 7854PropionitrileSolvent

Conditions

Temperature
90 °C

Procedure

(R)-3-(hydroxymethyl)-6a,7,9,10-tetrahydropyrido[3,2-e][1,4]thiazino[4,3-a]pyrazin-6(5H)-one (80.0 mg, 0.318 mmol) was suspended in propionitrile (0.8 mL) and (cyanomethyl)trimethylphosphonium iodide (93.0 mg, 0.382 mmol) was added followed by N-ethyl-N-isopropylpropan-2-amine (167 ul, 0.955 mmol). To the stirred mixture was then added 4-(piperazin-1-yl)benzonitrile (59.6 mg, 0.318 mmol). The reaction was heated to 90° C. with stirring for 16 h. The reaction was cooled to room temperature and left to sit 48 h. The precipitate was filtered off, washed with ethanol (5 mL) and dried in vacuum to afford the title compound (36.0 mg, 26.9%) as a white solid. 1H NMR (CHLOROFORM-d) δ (ppm): 8.26 (br. s., 1H), 7.79 (d, J=1.8 Hz, 1H), 7.44-7.60 (m, 2H), 6.96 (br. s., 1H), 6.76-6.91 (m, 2H), 5.05 (dt, J=13.6, 2.7 Hz, 1H), 4.43 (dd, J=10.7, 3.2 Hz, 1H), 3.27-3.63 (m, 6H), 3.15 (td, J=12.8, 2.3 Hz, 1H), 3.00 (td, J=12.8, 2.7 Hz, 1H), 2.77-2.93 (m, 2H), 2.59 (br. s., 4H), 2.34-2.45 (m, 1H). [M+H] calc'd for C22H24N6OS, 421. found, 421.

Workup

  1. temperatureThe reaction was cooled to room temperature
  2. waitleft
  3. waitto sit 48 h
  4. filtrationThe precipitate was filtered off
  5. washwashed with ethanol (5 mL)
  6. customdried in vacuum

Sources & evidence

ORD record
ord-31fff72395f54fd5b1b25f86ab4b1778
Source dataset
uspto-grants-2012_02
Patent number
US08124606B2

Reaction notes

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