New functions of (arene)tricarbonylchromium(0) complexes as hydrogenation catalysts: stereospecific semihydrogenation of alkynes and highly chemoselective hydrogenation of .alpha.,.beta.-unsaturated carbonyl compounds

1985 ◽  
Vol 50 (7) ◽  
pp. 1147-1149 ◽  
Author(s):  
Mikiko Sodeoka ◽  
Masakatsu Shibasaki
Keyword(s):  
Carbonyl Compounds ◽  
Hydrogenation Catalysts ◽  
Chemoselective Hydrogenation ◽  
Alpha Beta

scholarly journals Robust and efficient hydrogenation of carbonyl compounds catalysed by mixed donor Mn(I) pincer complexes

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Wenjun Yang ◽  
Ivan Yu. Chernyshov ◽  
Robin K. A. van Schendel ◽  
Manuela Weber ◽  
Christian Müller ◽  
...  
Keyword(s):  
Noble Metal ◽  
Crucial Role ◽  
Carbonyl Compounds ◽  
Catalytic Performance ◽  
Hydrogen Atmosphere ◽  
Pincer Complexes ◽  
Catalyst Activation ◽  
Hydrogenation Catalysts ◽  
Induction Times

AbstractAny catalyst should be efficient and stable to be implemented in practice. This requirement is particularly valid for manganese hydrogenation catalysts. While representing a more sustainable alternative to conventional noble metal-based systems, manganese hydrogenation catalysts are prone to degrade under catalytic conditions once operation temperatures are high. Herein, we report a highly efficient Mn(I)-CNP pre-catalyst which gives rise to the excellent productivity (TOF° up to 41 000 h−1) and stability (TON up to 200 000) in hydrogenation catalysis. This system enables near-quantitative hydrogenation of ketones, imines, aldehydes and formate esters at the catalyst loadings as low as 5–200 p.p.m. Our analysis points to the crucial role of the catalyst activation step for the catalytic performance and stability of the system. While conventional activation employing alkoxide bases can ultimately provide catalytically competent species under hydrogen atmosphere, activation of Mn(I) pre-catalyst with hydride donor promoters, e.g. KHBEt3, dramatically improves catalytic performance of the system and eliminates induction times associated with slow catalyst activation.

scholarly journals Hypervalent iodine oxidation of .ALPHA.,.BETA.-unsaturated carbonyl compounds.

1987 ◽  
Vol 35 (2) ◽  
pp. 570-577 ◽  
Author(s):  
YASUMITSU TAMURA ◽  
TAKAYUKI YAKURA ◽  
HIROAKI TERASHI ◽  
JUN-ICHI HARUTA ◽  
YASUYUKI KITA
Keyword(s):  
Carbonyl Compounds ◽  
Hypervalent Iodine ◽  
Alpha Beta

Organic reactions using sodium hydrogentelluride. 3. The Reaction of Sodium Hydrogentelluride with .alpha.,.beta.-Unsaturated Carbonyl Compounds

1994 ◽  
Vol 59 (12) ◽  
pp. 3500-3502 ◽  
Author(s):  
Masakazu Yamashita ◽  
Yoshifumi Tanaka ◽  
Akishi Arita ◽  
Minoru Nishida
Keyword(s):  
Carbonyl Compounds ◽  
Organic Reactions ◽  
Alpha Beta
Sign in / Sign up

Export Citation Format

Share Document