Acetic Acid → HCID 178453993, compound

HRID 1043156Notes

Reaction equation

HRID 1043156 reaction equation
[NH2:1][C@H:2]1[CH2:7][CH2:6][C@H:5]([NH:8][C:9](=[O:15])[O:10][C:11]([CH3:14])([CH3:13])[CH3:12])[CH2:4][CH2:3]1.[C:16](O)(=O)[CH3:17].C(O[C:23]1(O[Si](C)(C)C)[CH2:25][CH2:24]1)C.[C:31]([BH3-])#N.[Na+]>CO>[CH:23]1([N:1]([CH:17]2[CH2:16][CH2:31]2)[C@H:2]2[CH2:7][CH2:6][C@H:5]([NH:8][C:9](=[O:15])[O:10][C:11]([CH3:12])([CH3:14])[CH3:13])[CH2:4][CH2:3]2)[CH2:25][CH2:24]1

Participants

6

Reactant 4

HCID 176Acetic AcidHCID 2734686(1-Ethoxycyclopropoxy)trimethylsilaneHCID 5003444Sodium cyanoborohydrideHCID 178419079HCID 178419079, compound

Product 1

HCID 178453993HCID 178453993, compound

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

A suspension of tert-butyl(trans)-4-aminocyclohexylcarbamate (1 g), molecular sieves 3A (1 g), acetic acid (2.67 mL), (1-ethoxycyclopropoxy)trimethysilane (3.74 mL) and sodium cyanoborohydride (0.880 g) in dry methanol (10 mL) was heated at reflux for 3 hours. The insolubles were filtered off, the resulting solution was basified with aqueous NaOH (6 M) to pH 14, and extracted with ether. The combined extracts were washed with brine, dried and concentrated. The residue was purified by flash chromotography (silica gel 80 g, 30-100% acetone/hexanes) providing the product.

Workup

  1. temperaturewas heated
  2. temperatureat reflux for 3 hours
  3. filtrationThe insolubles were filtered off
  4. extractionextracted with ether
  5. washThe combined extracts were washed with brine
  6. customdried
  7. concentrationconcentrated
  8. customThe residue was purified by flash chromotography (silica gel 80 g, 30-100% acetone/hexanes)
  9. customproviding the product

Sources & evidence

ORD record
ord-1607a7b3b21e493093728ff95d3dc9b7
Source dataset
uspto-grants-2013_10
Patent number
US08557983B2

Reaction notes

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