Pyridine → HCID 86739798, compound

HRID 1154399Notes

Reaction equation

HRID 1154399 reaction equation
N1C=CC=CC=1.C1(N=C=NC2CCCCC2)CCCCC1.[CH3:22][C:23]1([CH3:38])[C@@H:25](/[CH:26]=[C:27](/Br)\[C:28]([O:30][CH2:31][CH2:32][CH3:33])=[O:29])[C@H:24]1[C:35]([OH:37])=[O:36].[C:39]([C@@H:41](O)[C:42]1[CH:47]=[CH:46][CH:45]=[C:44]([O:48][C:49]2[CH:54]=[CH:53][CH:52]=[CH:51][CH:50]=2)[CH:43]=1)#[N:40]>C(Cl)Cl.CN(C)C1C=CN=CC=1>[CH3:22][C:23]1([CH3:38])[C@@H:25](/[CH:26]=[CH:27]/[C:28]([O:30][CH2:31][CH2:32][CH3:33])=[O:29])[C@H:24]1[C:35]([O:37][C@H:41]([C:39]#[N:40])[C:42]1[CH:47]=[CH:46][CH:45]=[C:44]([O:48][C:49]2[CH:50]=[CH:51][CH:52]=[CH:53][CH:54]=2)[CH:43]=1)=[O:36]

Participants

7

Reactant 4

HCID 1049PyridineHCID 10868DicyclohexylcarbodiimideHCID 9837437(2S)-2-hydroxy-2-(3-phenoxyphenyl)acetonitrileHCID 86739799HCID 86739799, compound

Product 1

HCID 86739798HCID 86739798, compoundYield 20.1%

Reagents, catalysts & solvents 2

HCID 142844-(Dimethylamino)pyridineCatalystHCID 6344DichloromethaneSolvent

Procedure

0.9 ml of pyridine and 2 g of dicyclohexylcarbodiimide were added to a solution of 2.6 g of the product of Step A in 40 ml of methylene chloride and the mixture was stirred for 10 minutes. 2 g of (S)α-cyano-3-phenoxy-benzyl alcohol were added to the mixture which was stirred for 10 minutes after which 25 mg of 4-dimethylamino-pyridine were added thereto. The mixture was stirred for 90 minutes and was filtered and the filtrate was evaporated to dryness under reduced pressure. The residue was chromatographed over silica gel and was eluted with a 95-5 cyclohexane-ethyl acetate mixture to obtain 0.743 g of (S)α-cyano-3-phenoxy-benzyl (1R,cis) 2,2-dimethyl-3(E)-[2-propoxycarbonyl-ethenyl]-cyclopropane-1-carboxylate and 3.64 g of a mixture. The latter was dissolved in 4 volumes of hot isopropyl ether and the mixture was stirred at 20° C. and was then vacuum filtered to obtain another 2.32 g of the desired ester melting at 68° C.

Workup

  1. additionwere added
  2. stirringThe mixture was stirred for 90 minutes
  3. filtrationwas filtered
  4. customthe filtrate was evaporated to dryness under reduced pressure
  5. customThe residue was chromatographed over silica gel
  6. washwas eluted with a 95-5 cyclohexane-ethyl acetate mixture

Sources & evidence

ORD record
ord-ade7886a92684b9790db961b753e81d6
Source dataset
uspto-grants-1984_12
Patent number
US04489093

Reaction notes

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