AN IMPROVED ASYMMETRICALLY-MODIFIED NICKEL-CATALYST PREPARED FROM ULTRASONICATED RANEY-NICKEL

Authors
TAI A KIKUKAWA T SUGIMURA T INOUE Y ABE S OSAWA T HARADA T
Citation
A. Tai et al., AN IMPROVED ASYMMETRICALLY-MODIFIED NICKEL-CATALYST PREPARED FROM ULTRASONICATED RANEY-NICKEL, Bulletin of the Chemical Society of Japan, 67(9), 1994, pp. 2473-2477
Citations number
12
Categorie Soggetti
Chemistry
Journal title
Bulletin of the Chemical Society of Japan → ACNP
ISSN journal
00092673
Volume
67
Issue
9
Year of publication
1994
Pages
2473 - 2477
Database
ISI
SICI code
0009-2673(1994)67:9<2473:AIANPF>2.0.ZU;2-7
Abstract
The ultrasonic irradiation of Raney nickel catalyst in water followed by the removal of the resulting turbid supernatant gave an excellent n ickel catalyst (RNi-U) which generated an asymmetrically-modified nick el catalyst. An EPMA (SEM-EDX) study indicated that RNi-U consisted of a fairly pure nickel surface of homogeneous size. Tartaric acid-NaBr- modified RNi-U (TA-NaBr-MRNi-U) showed a high enantio-differentiating ability as well as reactivity in the hydrogenation of prochiral ketone s such as 1,3-diones and 3-oxoalkanoic acid esters.