Propargyl alcohol → ethyl 2-(8-(benzo[d]thiazol-2-yl((2-(trimethylsilyl)ethoxy)methyl)carbamoyl)-3,4-dihydroisoquinolin-2(1H)-yl)-5-(3-hydroxyprop-1-ynyl)thiazole-4-carboxylate

HRID 1518296Notes

Reaction equation

HRID 1518296 reaction equation
[S:1]1[C:5]2[CH:6]=[CH:7][CH:8]=[CH:9][C:4]=2[N:3]=[C:2]1[N:10]([CH2:34][O:35][CH2:36][CH2:37][Si:38]([CH3:41])([CH3:40])[CH3:39])[C:11]([C:13]1[CH:14]=[CH:15][CH:16]=[C:17]2[C:22]=1[CH2:21][N:20]([C:23]1[S:24][C:25](Br)=[C:26]([C:28]([O:30][CH2:31][CH3:32])=[O:29])[N:27]=1)[CH2:19][CH2:18]2)=[O:12].[CH2:42]([OH:45])[C:43]#[CH:44].CCN(CC)CC>CN(C=O)C.C(Cl)Cl.[Cu]I.Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1>[S:1]1[C:5]2[CH:6]=[CH:7][CH:8]=[CH:9][C:4]=2[N:3]=[C:2]1[N:10]([CH2:34][O:35][CH2:36][CH2:37][Si:38]([CH3:41])([CH3:40])[CH3:39])[C:11]([C:13]1[CH:14]=[CH:15][CH:16]=[C:17]2[C:22]=1[CH2:21][N:20]([C:23]1[S:24][C:25]([C:44]#[C:43][CH2:42][OH:45])=[C:26]([C:28]([O:30][CH2:31][CH3:32])=[O:29])[N:27]=1)[CH2:19][CH2:18]2)=[O:12]

Participants

8

Reactant 3

HCID 7859Propargyl alcoholHCID 8471TriethylamineHCID 59447650ethyl 2-(8-(benzo[d]thiazol-2-yl((2-(trimethylsilyl)ethoxy)methyl)carbamoyl)-3,4-dihydroisoquinolin-2(1H)-yl)-5-bromothiazole-4-carboxylate

Product 1

HCID 59447560ethyl 2-(8-(benzo[d]thiazol-2-yl((2-(trimethylsilyl)ethoxy)methyl)carbamoyl)-3,4-dihydroisoquinolin-2(1H)-yl)-5-(3-hydroxyprop-1-ynyl)thiazole-4-carboxylateYield 51.9%

Reagents, catalysts & solvents 4

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 178418476HCID 178418476, compoundCatalystHCID 6228DimethylformamideSolventHCID 6344DichloromethaneSolvent

Conditions

Temperature
90 °C

Procedure

A mixture of compound 34C (0.38 g, 0.564 mmol), prop-2-yn-1-ol (0.047 g, 0.846 mmol), CuI (0.011 g, 0.056 mmol), Et3N (1.57 mL, 11 mmol) and Pd(PPh3)2Cl2 (0.02 g, 0.028 mmol) in DMF (2 mL) was heated at 90° C. for 2 hours. After cooling, the reaction mixture was diluted with CH2Cl2. The solid was filtered off. The filtrate was concentrated. The residue was purified by flash column chromatography on silica gel eluting with 3:2/hexanes:EtOAc to provide 0.19 g of the desired product 36B as a mixture of two inseparable isomers: MS (ESI(+)): m/z 649 (M+H).

Workup

  1. temperatureAfter cooling
  2. filtrationThe solid was filtered off
  3. concentrationThe filtrate was concentrated
  4. customThe residue was purified by flash column chromatography on silica gel eluting with 3:2/hexanes

Sources & evidence

ORD record
ord-847912b4c52e4d0f9d234e9238858a7e
Source dataset
uspto-grants-2012_07
Patent number
US08232273B2

Reaction notes

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