25372-14-9Relevant academic research and scientific papers
New bis(mercaptoimidazolyl)(pyrazolyl)borate ligands and their zinc complex chemistry
Shu, Mouhai,Walz, Rainer,Wu, Biao,Seebacher, Jan,Vahrenkamp, Heinrich
, p. 2502 - 2511 (2007/10/03)
Nine new tripodal NS2 ligands of the bis(mercaptoimidazolyl)(pyrazolyl)borate type with varying 3-R-mercaptoimidazolyl moieties were prepared as their potassium salts. Treatment with zinc salts yielded the complex types L·Zn-Cl, L·Zn-I, L·Zn-ONO2, L·Zn-OClO3 and [L·Zn(imidazole)]ClO4. Attempts at the formation of L·Zn-OH or cationic L·Zn complexes resulted in dismutation and formation of ZnL2 complexes. Hydrolytic destruction yielded one [OZn4(thiooimidazolate)6] complex. The ZnS2NO coordination which is present in the enzyme-substrate complex of alcohol dehydrogenase could be successfully modelled by an [L·Zn(C2H5OH)]+ complex. The L·Zn-X complexes showed very low catalytic activity in the dehydrogenation of 2-propanol or the hydrogenation of p-nitrobenzaldehyde. The new compounds were identified by a total of 12 structure determinations. Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003.
Catalytic asymmetric oxidation of sulfide with titanium-mandelic acid complex: Practical synthesis of (S)-3-[1-(2-methylphenyl)imidazol-2-ylsulfinyl]propan-1-ol, the key intermediate of OPC-29030
Matsugi,Fukuda,Muguruma,Yamaguchi,Minamikawa,Otsuka
, p. 2739 - 2744 (2007/10/03)
An effective catalytic asymmetric oxidation of prochiral sulfide 1a to (S)-2a has been achieved by the use of chiral titanium-mandelic acid complex. The enantioselectivity was found to be not influenced by moisture, and moderate to high selectivity (76% e
