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Efficient iron-mediated approach to pyrano[3,2-a]carbazole alkaloids--first total syntheses of O-methylmurrayamine A and 7-methoxymurrayacine, first asymmetric synthesis and assignment of the
Iron-mediated oxidative cyclisation provides an efficient approach to pyrano[3,2-a]carbazole alkaloids. Thus, improved routes to girinimbine and murrayacine as well as the first total syntheses of
A stabilizer system for stabilizing PVC
(51) Int. Cl. CSK 5/34 (2006.01) (52) U.S. Cl. ........................................ ... 524/100 (58) Field of Classification Search ................. 524/100 See application file for complete
Stabilizer system for the stabilization of polymers containing halogen.
The invention relates to stabilizer mixtures which are suited for stabilizing polymers that contain halogen, particularly PVC, whereby said mixtures contain: a) a perchlorate salt, and; b) an
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