METHOD FOR THE PRODUCTION OF MUMBAISTATIN DERIVATIVES
申请人:SCHWINK Lothar
公开号:US20090156836A1
公开(公告)日:2009-06-18
The present invention relates to a process for preparing mumbaistatin derivatives (I), where the anthraquinone skeleton is constructed via a Diels-Alder reaction and the central methylene bridge via a transition metal-catalyzed reaction, and to the intermediates used in this process.
Electrostatic toner containing a keto compound as a charge stabilizer
申请人:BASF Aktiengesellschaft
公开号:US05338639A1
公开(公告)日:1994-08-16
Electrostatic toners contain a polymeric binder and, as a charge stabilizer, a compound of the formula ##STR1## where Z is C.sub.1 -C.sub.20 -alkyl which is unsubstituted or substituted by phenyl or Z is C.sub.5 -C.sub.7 -cycloalkyl or unsubstituted or substituted phenyl, X and Y are each cyano or a radical of the formula --CO--OR.sup.1, --CO--NR.sup.1 R.sup.2 or --C--R.sup.3, where R.sup.2 is C.sub.1 -C.sub.20 -alkyl which is unsubstituted or substituted by phenyl or R.sup.1 is C.sub.5 -C.sub.7 -cycloalkyl, R.sup.2 is hydrogen or C.sub.1 -C.sub.4 -alkyl and R.sup.3 is C.sub.1 -C.sub.20 -alkyl which is unsubstituted or substituted by phenyl or R.sup.3 is C.sub.5 -C.sub.7 -cycloalkyl or unsubstituted or substituted phenyl, or X and Y together form a radical of the formula --CO--L--CO-- or --CO--CH.dbd.C(CH.sub.3)--O--CO--, where L is C.sub.2 -C.sub.4 -alkylene, and cat.sup..sym. is one equivalent of a cation.
Method for the production of oh protected{4-(2.6-diamino-9h-purine-9-yl)-1.3-dioxolane-2-yl] methanol derivatives
申请人:Doring Wolfgang
公开号:US20060211855A1
公开(公告)日:2006-09-21
Glycosylation of 2.6-diaminopurines or silyl derivatives thereof with a compound of the structure is facilitated by the presence of an optionally silylated 1,3-dicarbonyl compound during glycosylation. Byproducts are minimized, while stereoselectivity may be altered by choice of Lewis acid and other reaction condictions.
Method for the production of mumbaistatin derivatives
申请人:Sanofi-Aventis
公开号:US07763740B2
公开(公告)日:2010-07-27
The present invention relates to a process for preparing mumbaistatin derivatives (I), where the anthraquinone skeleton is constructed via a Diels-Alder reaction and the central methylene bridge via a transition metal-catalyzed reaction, and to the intermediates used in this process.