Reaktion #1726674

ord-c571f5eb9e43484d96d111f6f13c1ec3

Reaktionsgleichung

[H][H]
hydrogen
COC(=O)C(=O)c1ccccc1
methyl benzoyl formate
C=C[C@H]1CN2CC[C@H]1C[C@H]2[C@H](O)c1ccnc2ccccc12
(−) cinchonidine
→
COC(=O)[C@H](O)c1ccccc1
(R)-methyl mandelate
Ausbeute 99.7%

Edukte

—
Ir Pt
[H][H]
hydrogen
COC(=O)C(=O)c1ccccc1
methyl benzoyl formate
C=C[C@H]1CN2CC[C@H]1C[C@H]2[C@H](O)c1ccnc2ccccc12
(−) cinchonidine
—
Ir Pt
—
Example 13

Reagenzien

Keine

Lösungsmittel

Cc1ccccc1
toluene

Reaktionsbedingungen

Detaillierte Bedingungen
See reaction.notes.procedure_details.

Aufarbeitung

  1. 1
    workup.ADDITIONwere mixed in an autoclave
  2. 2
    Sonstigewas removed by filtration
  3. 3
    Sonstigeafter the reaction
  4. 4
    EinengenThe filtrate was concentrated
  5. 5
    Sonstigethe residue was purified

Vorschrift

The cross-linked Ir—Pt cluster composition obtained in Example 13 (20.2 mg), methyl benzoyl formate (164.2 mg, 1.0 mmole), (−) cinchonidine (3.8 mg, 0.013 mmole) and toluene (5 ml) were mixed in an autoclave and agitated for five hours at room temperature in a hydrogen atmosphere at a pressure of 50 atmospheres. The cross linked Ir—Pt cluster composition was removed by filtration after the reaction. The filtrate was concentrated, and the residue was purified using PTLC to obtain (R)-methyl mandelate (165.6 mg, 99.7% yield). The asymmetric yield was 62.6% ee.

Quelle

DOI: 10.6084/m9.figshare.5104873.v1Patent: US08110519B2uspto-grants-2012_02