Triethylamine → HCID 178471557, compound

HRID 620102Notes

Reaction equation

HRID 620102 reaction equation
Br[C:2]1[CH:19]=[N:18][C:5]2[N:6]=[C:7]([NH:11][C:12](=[O:17])[C:13]([CH3:16])([CH3:15])[CH3:14])[N:8]=[C:9]([OH:10])[C:4]=2[CH:3]=1.[C:20]([C:22]1[CH:43]=[CH:42][C:25]([C:26]([NH:28][C@H:29]([C:37]([O:39][CH2:40][CH3:41])=[O:38])[CH2:30][CH2:31][C:32]([O:34][CH2:35][CH3:36])=[O:33])=[O:27])=[CH:24][CH:23]=1)#[CH:21].C(N(CC)CC)C.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>C(#N)C.[Pd](Cl)Cl>[C:12]([NH:11][C:7]1[N:8]=[C:9]([OH:10])[C:4]2[CH:3]=[C:2]([C:21]#[C:20][C:22]3[CH:23]=[CH:24][C:25]([C:26]([NH:28][C@H:29]([C:37]([O:39][CH2:40][CH3:41])=[O:38])[CH2:30][CH2:31][C:32]([O:34][CH2:35][CH3:36])=[O:33])=[O:27])=[CH:42][CH:43]=3)[CH:19]=[N:18][C:5]=2[N:6]=1)(=[O:17])[C:13]([CH3:16])([CH3:15])[CH3:14]

Participants

7

Reactant 4

HCID 8471TriethylamineHCID 11776TriphenylphosphineHCID 10936456Diethyl N-(4-ethynylbenzoyl)-L-glutamateHCID 178447249HCID 178447249, compound

Product 1

HCID 178471557HCID 178471557, compoundYield 53.9%

Reagents, catalysts & solvents 2

HCID 24290Palladium ChlorideCatalystHCID 6342AcetonitrileSolvent

Procedure

A mixture of 2.0 g of 6-bromo-2-pivaloylamino-4-hydroxypyrido[2,3-d]pyrimidine, 2.1 g of diethyl N-(4-ethynylbenzoyl)-L-glutamate, 2.57 ml of triethylamine, 0.11 g of palladium chloride, 0.32 g of triphenylphosphine, and 0.05 g of cuprous chloride in 150 ml of acetonitrile is heated at reflux under nitrogen for 2.5 hours. The solid which forms upon first cooling to room temperature is collected by filtration, and washed with cold acetonitrile to yield 1.91 g of diethyl N-[4-(2-pivaloylamino-4-hydroxypyrido[2,3-d]pyrimidin-6-ylethynyl)benzoyl]-L-glutamate which is sufficiently pure for further processing. Chromatography on silica gel with 5% methanol:methylene chloride showing the following physical properties. m.p. >250° C.; NMR (CDCl3, 300 MHz) delta 1.25 (t, 3H, J=7.20 Hz), 1.33 (t, 3H, J=7.20 Hz), 1.36 (s, 9H), 2.14-2.62 (m, 4H), 4.14 (q, 2H, J= 7.20 Hz), 4.27 (q, 2H, J=7.20 Hz) 4.79-4.86 (m, 1H), 7.30 (d, 1H, J=8.40 Hz), 7.63 (d, 2H, J=8.25 Hz), 7.86 (d, 2H, J=8.25 Hz), 8.51 (brs, 1H), 8.64 (d, 1H, J=2.40 Hz), 8.97 (d, 1H, J=2.40 Hz), 12.2 (brs, 1H); IR (KBr) 3330, 3290, 2970, 1730, 1655, 1590, 1530, 1440, 1370, 1260, 1140, 1020, 965, 925, 850, 810, and 760 cm-1 ; 13C-NMR (CDCl3, 75 MHz) delta 14.3, 27.1, 27.2, 30.7, 40.6, 52.7, 61.1, 62.0, 87.61, 92.71, 115.1, 117.3, 125.9, 127.4, 127.5, 132.0, 133.9, 138.7, 149.6, 157.8, 158.6, 160.5, 166.4 172.1, 173.5, 180.8.

Workup

  1. temperatureis heated
  2. temperatureat reflux under nitrogen for 2.5 hours
  3. filtrationis collected by filtration
  4. washwashed with cold acetonitrile

Sources & evidence

ORD record
ord-b5e5003d498241d8a254e4205dac60e3
Source dataset
uspto-grants-1989_04
Patent number
US04818819

Reaction notes

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