chelate amine ligand, [Mg(O2CCF3)2(TAD)], mimicking the active site of the RuBisCOregulation factor, was prepared as a CO2 absorbent. The inorganic complex absorbent exhibited absorption capacity of 2.0 mol CO2/mol complex and the heat of CO2 absorption of 70.88 kJ/mol. Upon the comparison with the common absorbent, i.e., monoethanolamine (MEA), the novel CO2 absorbent outperformed and showed lower heat
Optically active alcohol and process for the production thereof
申请人:Mitsubishi Gas Chemical Company, Inc.
公开号:US05942646A1
公开(公告)日:1999-08-24
A novel R-configuration or S-configuration optically active alcohol of the formula (1), CF.sub.3 C*H(OH)(CH.sub.2).sub.m OCH.sub.2 CH.sub.n F.sub.3-n(1) wherein C* is an asymmetric carbon atom, m is an integer of 2 to 7, and n is an integer of 0 to 2, and a process for the production of the optically active alcohol from a monohalogenated alkyl having a fluoroalkoxy group at a terminal. The novel optically active alcohol, provided by the present invention, having a trifluoromethyl group on an asymmetric carbon atom and a fluoroalkoxy group at a terminal, is useful as a raw material for the production of a novel liquid crystal compound.
4-Carboxy azetidinone compounds and production thereof from diketene and
申请人:Sumitomo Chemical Company, Limited
公开号:US04556514A1
公开(公告)日:1985-12-03
.beta.-Lactam compounds which are useful as intermediates for the production of carbapenem or penem derivatives and a process for producing the same. The process comprises reacting a Schiff base with diketene in the presence of an imidazole, reducing the acetyl group of the resulting N-protected-3-acetyl-2-azetidinone-4-carboxylic acid ester, and removing the protecting group for a carboxyl group from the resulting 3-(1-hydroxyethyl)-2-azetidinone-4-carboxylic acid derivative.
Azetidin-2-one derivatives, and process for production thereof using tin
申请人:Lederle (Japan), Ltd.
公开号:US04918184A1
公开(公告)日:1990-04-17
An azetidin-2-one derivative represented by the following formula (I) ##STR1## wherein R.sup.1 represents a hydrogen atom, a lower alkyl group, an aryl group, an aralkyl group, a lower alkoxy group, aralkoxy group, a lower alkylthio group, an aralkylthio group, or a substituted amino group, R.sup.2 represents a hydrogen atom, a lower alkyl group, an aryl group or an aralkyl group, and R.sup.3 represents a hydrogen atom or a group of the formula ##STR2## in which R.sup.4 represents a hydrogen atom or a protective group for the hydroxyl group; and a process for production thereof.