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Title:
変性アルミナ触媒
Document Type and Number:
Japanese Patent JP2005503256
Kind Code:
A
Abstract:
In one aspect, the invention provides a solid catalyst comprising an active alumina catalyst impregnated with a metal hydroxide. In another aspect, the invention provides a process for preparing the inventive alumina catalyst. In certain embodiments, the catalyst may be used for the protection of amines, alcohols and thiols with a wide variety of protecting agents. This procedure is widely applicable for N-protection of amino acids which finds wide industrial applications. The catalyst is also useful for carrying out nucleophilic substitutions of aromatic halides containing an electron-withdrawing group. A wide variety of nucleophiles chosen from amines, primary and secondary, aromatic and aliphatic, as well as alcohols and thiols have been successfully employed. The methodology involves simple techniques and easy work up procedures and is thus useful for large-scale industrial preparations. Additionally, the reactions avoid the use of harmful solvents and thus satisfy the need for green chemistry.

Inventors:
Surinas Sumitra
Slider Run Madaba
Sambassivan ganesh
Application Number:
JP2003528679A
Publication Date:
February 03, 2005
Filing Date:
September 20, 2001
Export Citation:
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Assignee:
BIOCON LIMITED
International Classes:
B01J23/02; B01J23/04; B01J37/02; C07B61/00; C07C68/02; C07C69/96; C07C209/06; C07C209/10; C07C211/56; C07C269/04; C07C271/28; C07C319/14; B01J21/04; C07C323/09; C07C323/22; C07D211/74; C07D295/112; C07D295/155; (IPC1-7): B01J23/04; C07C68/02; C07C69/96; C07C209/06; C07C211/56; C07C269/04; C07C271/28; C07C319/14; C07C323/09; C07C323/22
Attorney, Agent or Firm:
Hiroshi Okawa