Triethylamine → HCID 57941318, compound

HRID 1437878Notes

Reaction equation

HRID 1437878 reaction equation
[C:1]([O:5][C:6]([N:8]([CH3:10])[NH2:9])=[O:7])([CH3:4])([CH3:3])[CH3:2].[CH:11]1[C:20]2[C:15](=[CH:16][CH:17]=[CH:18][CH:19]=2)[CH:14]=[CH:13][C:12]=1B(O)O.C(N(CC)CC)C>ClCCCl.C([O-])(=O)C.[Cu+2].C([O-])(=O)C>[C:1]([O:5][C:6]([N:8]([CH3:10])[NH:9][C:13]1[CH:12]=[CH:11][C:20]2[C:15](=[CH:16][CH:17]=[CH:18][CH:19]=2)[CH:14]=1)=[O:7])([CH3:4])([CH3:3])[CH3:2]

Participants

6

Reactant 3

HCID 8471TriethylamineHCID 2734375(Naphthalen-2-yl)boronic acidHCID 37482801-Boc-1-methylhydrazine2×

Product 1

HCID 57941318HCID 57941318, compoundYield 45.1%

Reagents, catalysts & solvents 2

HCID 8895Cupric acetateCatalystHCID 111,2-DichloroethaneSolvent

Conditions

Temperature
50 °C

Procedure

A mixture of N-methyl-hydrazinecarboxylic acid tert-butyl ester (Intermediate 1; 1.50 g, 10.26 mmol), 2-naphthaleneboronic acid (Lancaster; 1.90 g, 11.05 mmol), copper(II) acetate (1.90 g, 10.46 mmol) and triethylamine (3.6 mL, 25.8 mmol) in 1,2-dichloroethane (40 mL) was heated in an oil bath at 50° C. for 45 min. The mixture was allowed to cool, and it was then adsorbed onto silica gel and purified by chromatography using an ISCO 120 g column, eluting with 15-20% ethyl acetate/hexanes, to give N-methyl-N′-naphthalen-2-yl-hydrazinecarboxylic acid tert-butyl ester (1.26 g, 45%) as an orange oil that partially solidified. The Boc region of the 1H NMR spectrum integrated high, but the material was used directly in subsequent steps without further purification.

Workup

  1. temperatureto cool
  2. custompurified by chromatography
  3. washeluting with 15-20% ethyl acetate/hexanes

Sources & evidence

ORD record
ord-17ee1e839fc6477e952f235f710acb32
Source dataset
uspto-grants-2009_11
Patent number
US07622492B2

Reaction notes

Loading…