Reference

Selective hydrogen transfer reduction of ketones by recyclable ruthenium complex catalysts containing a ROMP polymer-attached ligand

All Rights Reserved. Several substances are used for example 90614-07-6 and 34076-51-2 which are their cas registry numbers. Selective hydrogen transfer reduction of ketones by recyclable ruthenium complex catalysts containing a ROMP polymer-attached ligand. Nomura, Kotohiro; Kuromatsu, Yutaka (Graduate School of Materials Science, Nara Institute of Science and Technology (NAIST), Ikoma, Nara 630-0101, Japan). Journal of Molecular Catalysis A: Chemical, 245(1-2), 152-160 (English) 2006 Elsevier B.V. CODEN: JMCCF2. ISSN: 1381-1169. DOCUMENT TYPE: Journal CA Section: 25 (Benzene, Its Derivatives, and Condensed Benzenoid Compounds) Section cross-reference(s): 23, 24, 29, 36 Various pyridine and 2,2'-bipyridyl ligands attached to the polymer chain end of ring-opened poly(norbornene) were prepd. by living ring-opening metathesis polymn. (ROMP) using Mo(CHCMe2Ph)(N-2,6-diisopropylphenyl)(tert-butoxy)2. The prepd. pyridine and 2,2'-bipyridyl derivs. were examd. for their use as ligands for catalytic hydrogen transfer redn. of cyclohexanone in the presence of Ru(acac)3 (in toluene/iPrOH in the presence of NaOiPr, at 50 °C, acac: acetylacetonato). The catalytic activity increased upon addn. of the above polymer as the ligand, and the prepd. catalyst could be recovered by filtration as the ppt., by pouring the reaction mixt. into methanol. The recovered catalyst could be reused without decrease in the activity. Since the olefinic double bond in the ROMP polymer was not hydrogenated under these reaction conditions, exclusive redn. of carbonyl group in various ketones, such as acetophenone, 5-hexen-2-one, 2-allylhexanone could be achieved in this catalysis. .

Asymmetric reactions catalyzed by chiral metal complexes

Asymmetric reactions catalyzed by chiral metal complexes.Some chemicals with cas registry numbers like 138942-33-3 and 90614-07-6 are also used. XLIX. Synthesis of atropisomeric biphenylbisphosphine. 6,2'-Bis(diphenylphosphino)-3-methoxy-2,4-dimethyl-4',6'-bis(trifluorom ethyl)-1,1'-biphenyl (FUPMOP) and its use in ruthenium(II)-catalyzed asymmetric hydrogenation of a 3-oxo ester. Murata, Masanao; Morimoto, Toshiaki; Achiwa, Kazuo (Sch. Pharm. Sci., Univ. Shizuoka, Shizuoka 422, Japan). Synlett, (11), 827-9 (English) 1991. CODEN: SYNLES. ISSN: 0936-5214. DOCUMENT TYPE: Journal CA Section: 29 (Organometallic and Organometalloidal Compounds) New atropisomeric biphenylbisphosphines, 6,2'-bis(diphenylphosphino)-3-methoxy-2,4-dimethyl-4',6'-bis(trifluorom ethyl)-1,1'-biphenyl (FUPMOP) and 2,2'-bis(diphenylphosphino)-4,4',6,6'-tetrakis(trifluoromethyl)-1,1'-biphe nyl (BIFUP), were prepd. from 2,3,5-Br(CF3)2C6H2NO2. The FUPMOP-Ru(II) complex was an excellent catalyst for the asym. hydrogenation of MeCOCH2CO2Me. .