摘要:
The complex of the present invention containing an onium salt and a central Lewis acidic metal has a high catalytic activity at a high temperature for the copolymerization of an epoxide and carbon dioxide to produce a high molecular weight polycarbonate.
摘要:
The complex of the present invention containing an onium salt and a central Lewis acidic metal has a high catalytic activity at a high temperature for the copolymerization of an epoxide and carbon dioxide to produce a high molecular weight polycarbonate.
摘要:
The present invention relates to a novel thrombin inhibitor which is effective even when orally administered. More specifically, the present invention relates to an aromatic amidine derivative represented by formula (I) and the salts thereof, which show potent selective inhibitory activity for thrombin in which (a), R, R1, R2, R3, A, W, Y and n are defined as described in the specification.
摘要:
The complex of the present invention containing an onium salt and a central Lewis acidic metal has a high catalytic activity at a high temperature for the copolymerization of an epoxide and carbon dioxide to produce a high molecular weight polycarbonate.
摘要:
The complex of the present invention containing an onium salt and a central Lewis acidic metal has a high catalytic activity at a high temperature for the copolymerization of an epoxide and carbon dioxide to produce a high molecular weight poly-carbonate.
摘要:
Novel amine derivatives of the following general formula (I): ##STR1## (wherein) A may denote --(CH.sub.2)--O--, --(CH.sub.2).sub.2 --O--, or --(CH.sub.2).sub.2 --NH--;B may denote --(CH.sub.2).sub.2 --;R.sub.1 may denote a hydrogen atom, a halogen atom, a nitro group, a 1-pyrrolyl group, an acetamido group, an amino group or a dimethylamino group;R.sub.2 may denote a hydrogen atom or a nitro group;R.sub.3 and R.sub.4 may denote a hydrogen atom;R.sub.8a and R.sub.8b which are the same may denote a chlorine atom or a methoxy group;R.sub.9 may denote a hydrogen atom or an amino group;R may denote a methyl group; andX may denote a methanesulfonamido group, a 1-imidazolyl group or a nitro group or a salts thereof are useful as antiarrhythmic drugs.
摘要:
The complex of the present invention containing an onium salt and a central Lewis acidic metal has a high catalytic activity at a high temperature for the copolymerization of an epoxide and carbon dioxide to produce a high molecular weight polycarbonate.
摘要:
The complex of the present invention containing an onium salt and a central Lewis acidic metal has a high catalytic activity at a high temperature for the copolymerization of an epoxide and carbon dioxide to produce a high molecular weight poly-carbonate.