Reaktion #54462

ord-87efbb3cd2e2408bab3720b01796182a

Reaktionsgleichung

CC(=O)C(Cc1cc(C(C)(C)C)c(O)c(C(C)(C)C)c1)(Cc1cc(C(C)(C)C)c(O)c(C(C)(C)C)c1)C(=O)OC1CC(C)(C)NC(C)(C)C1
2,2,6,6-tetramethyl-4-piperidinyl 2,2-bis-(3,5-di-tert-butyl-4-hydroxybenzyl)-acetoacetate
CC(=O)OC(C)=O
acetic anhydride
→
CC(=O)N1C(C)(C)CC(OC(=O)C(Cc2cc(C(C)(C)C)c(O)c(C(C)(C)C)c2)(Cc2cc(C(C)(C)C)c(O)c(C(C)(C)C)c2)C(C)=O)CC1(C)C
1-acetyl-2,2,6,6-tetramethyl-4-piperidinyl 2,2-bis-(3,5-di-tert-butyl-4-hydroxybenzyl)-acetoacetate

Edukte

CC(=O)C(Cc1cc(C(C)(C)C)c(O)c(C(C)(C)C)c1)(Cc1cc(C(C)(C)C)c(O)c(C(C)(C)C)c1)C(=O)OC1CC(C)(C)NC(C)(C)C1
2,2,6,6-tetramethyl-4-piperidinyl 2,2-bis-(3,5-di-tert-butyl-4-hydroxybenzyl)-acetoacetate
CC(=O)OC(C)=O
acetic anhydride

Reagenzien

Keine

Reaktionsbedingungen

Detaillierte Bedingungen
See reaction.notes.procedure_details.

Aufarbeitung

  1. 1
    EinengenThe mixture is concentrated in vacuo
  2. 2
    SonstigeAfter recrystallisation from hexane/toluene
  3. 3
    Filtrationthe product is filtered off

Vorschrift

A solution of 2,2,6,6-tetramethyl-4-piperidinyl 2,2-bis-(3,5-di-tert-butyl-4-hydroxybenzyl)-acetoacetate (Example 1, 10.0 g; 0.015 mol) in 100 ml of acetic anhydride is stirred for 20 hours at 100°. The mixture is concentrated in vacuo. After recrystallisation from hexane/toluene, the product is filtered off and 8.41 g of 1-acetyl-2,2,6,6-tetramethyl-4-piperidinyl 2,2-bis-(3,5-di-tert-butyl-4-hydroxybenzyl)-acetoacetate, melting point 165°-166° C. (compound 22), are obtained.

Quelle

DOI: 10.6084/m9.figshare.5104873.v1Patent: US04148784uspto-grants-1979_04