Tri-o-tolylphosphine → 5'-(3-Pyridyl)spiro[1-azabicyclo[2.2.2]octane-3,2'(3'H)-furo[2,3-b]pyridine]

HRID 49618

Reaction equation

HRID 49618 reaction equation
Br[C:2]1[CH:3]=[C:4]2[CH2:10][C:9]3([CH:15]4[CH2:16][CH2:17][N:12]([CH2:13][CH2:14]4)[CH2:11]3)[O:8][C:5]2=[N:6][CH:7]=1.C1(C)C=CC=CC=1P(C1C=CC=CC=1C)C1C=CC=CC=1C.[Cl-].[Li+].C([Sn](CCCC)(CCCC)[C:47]1[CH:48]=[N:49][CH:50]=[CH:51][CH:52]=1)CCC>COCCOC.C(Cl)(Cl)Cl.CO>[N:49]1[CH:50]=[CH:51][CH:52]=[C:47]([C:2]2[CH:3]=[C:4]3[CH2:10][C:9]4([CH:15]5[CH2:16][CH2:17][N:12]([CH2:13][CH2:14]5)[CH2:11]4)[O:8][C:5]3=[N:6][CH:7]=2)[CH:48]=1

Participants

8

Reactant 4

HCID 80271Tri-o-tolylphosphineHCID 433294Lithium ChlorideHCID 34838483-(Tributylstannyl)pyridineHCID 103571335'-bromospiro[1-azabicyclo[2.2.2]octane-3,2'(3'H)-furo[2,3-b]pyridine]

Product 1

HCID 159082415'-(3-Pyridyl)spiro[1-azabicyclo[2.2.2]octane-3,2'(3'H)-furo[2,3-b]pyridine]Yield 37%

Reagents, catalysts & solvents 3

HCID 887MethanolSolventHCID 6212ChloroformSolvent2×HCID 80711,2-DimethoxyethaneSolvent

Procedure

A solution containing 5′-bromospiro[1-azabicyclo[2.2.2]octane-3,2′(3′H)-furo[2,3-b]pyridine] (158 mg, 0.535 mmol), tris(dibenzylidineacetone)dipalladium (0) (23 mg, 0.025 mmol), tri(o-tolyl)phosphine (66 mg, 0.217 mmol), lithium chloride (99 mg, 2.34 mmol), and 3-(tri-n-butylstannyl)pyridine (0.3 ml, approx. 0.3 g, approx. 0.82 mmol) in 1,2-dimethoxyethane (2 ml) was heated under reflux for 6 h. The solution was evaporated, and the residue was taken up in chloroform and filtered. The filtrate was evaporated then purified by HPLC using a gradient of 0-20% 1:1:2 7M methanolic ammonia:methanol:chloroform and chloroform to obtain the title compound (58 mg, 0.198 mmol, 37%) as a pale solid: electrospray MS (m/z, relative intensity) 294 ([MH]+, 80), 273 (100).

Workup

  1. temperaturewas heated
  2. temperatureunder reflux for 6 h
  3. customThe solution was evaporated
  4. filtrationfiltered
  5. customThe filtrate was evaporated
  6. customthen purified by HPLC

Sources & evidence

ORD record
ord-a89977097b1f4f29bd1dc6c8b3ab427a
Source dataset
uspto-grants-2004_03
Patent number
US06706878B2

Linked notes

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