Elektrophile Alkylierungen von Norbornen – Synthese 7-substituierter Norbornene

Synthese von 3D Videos

Verbesserte Synthese von Dichlorisoeverninsäure

D ichlorisoeverninsäure (1) ist das prosthetische C hrom ophor der O rthosom ycin-A ntibiotika [1] Avilamycine A und C [2], Curam ycin [3], Everninomycine B, C und D [4] und Flam bam ycin [1] und findet als Futterm ittelzusatz V erw endung [5]. E ine schon von uns beschriebene Synthese von 1 bedarf der säulenchrom atographischen Reinigung der Zw i­ schenstufen und stellt daher nur kleinere M en...

Synthese und optische Eigenschaften endstandig substituierter konjugierter Polyene mit Bicyclo[2.2.2]octan als Spacer

The conjugated polyenes 10, 11, and 17 respectively, with 9anthryland 2-tetraphenylporphyrinyl (TPP) terminal groups and a bicyclooctane unit incorporated into the polyene chain were synthesized by Wittig olefinations. In all cases it was possible to obtain the all-(4 compounds from the (Q/(Z)-isomeric mixtures by chromatographic purification and several recrystallizations. From the UV/Vis spec...

Synthese, Struktur und Reaktivität von Aminomethylpyridin- zinkdihalogeniden

Halide, Pyridine Complexes, Zinc, X-Ray Data Zinc dichloride reacts with aminomethylpyridine (AMP) to the corresponding 1:1 adduct 1, whereas ZnBr2 forms an ionic 1:2 complex of the type [(AMP)2ZnBr]+ Br~ 2, which loses one neutral coligand upon heating in M e-C (0)0E t to yield nearly insoluble (AMP)ZnBr2 3. The condensation reaction of these compounds with acetone yields propylideneaminomethy...

Zur Synthese und Kristallstruktur von Kupfercadmiumpyroboratoxid:

Single crystals of the new compound Cu2Cd(B20 5) 0 have been prepared by B20 3/V 20 5 flux technique in a closed silver tube. Their structure is isotypic with Cu2Co(B20 5) 0 but its preparation is quite different. X-ray investigations on single crystals led to the space group C |h-P 2 !/c (Nr. 14), a = 339.9(2); b = 1509.8(2); c 927,0(1) pm; ß = 93.19(1)°; Z 4. The structure contains isolated B...