Chiral auxiliaries useful for efficiently producing a phosphorus atom-modified nucleic acid derivative with high stereoregularity, and compounds represented by the following the general formula (I) or the general formula (XI) for introducing the chiral auxiliaries.
Synthesis and Characterization of Tris(bipyridyl)ruthenium(II)-Modified Mono-, Di-, and Trinuclear Manganese Complexes as Electron-Transfer Models for Photosystem II
作者:Dirk Burdinski、Eberhard Bothe、Karl Wieghardt
DOI:10.1021/ic990755a
日期:2000.1.1
bound to a tris(bipyridyl)ruthenium(II)-type unit (tacn = 1,4,7-triazacyclononane). In these compounds several electron-transfer steps were detected by electrochemical methods which are assigned to different redox processes located at individual electrochemically active components (Mn, Ru, bipyridyl, phenolate). For example, in the "mononuclear" compounds [LnMn](PF6)m (n = 1 or 2) Mn(II), Mn(III),
A medicament for enhancing an effect of a cancer therapy based on a mode of action of DNA injury, which comprises as an active ingredient a compound represented by the following general formula (I) or a salt thereof:
wherein one of R
1
and R
2
represents hydrogen atom and the other represents the formula —X-A wherein A represents hydrogen atom or an acyl group, X represents oxgen atom or NH; one of R
3
and R
4
represents hydrogen atom and the other represents the following formula:
wherein Y represents a sulfonyl group or a carbonyl group, R
5
represents a cyclic group, Z represents a single bond or a C
1
to C
4
alkylene group, R
6
represents hydrogen atom or a C
1
to C
6
alkyl group.