CONFORMATION DEPENDENT CYCLIZATIONS OF 1,3,3,5-TETRAPHENYLPENTANE-1,5-DIONE
The molecular and crystal structure of 1,3,3,5-tetraphenylpentane-1,5-dione (I) obtained from direct methods and anisotropically refined by the least-squares method shows that the two 3,3-phenyl groups force the molecule into a conformation suitable for f
Sebek, Pavel,Novotny, Jiri,Kratochvil, Bohumil,Schwarz, Marian,Kuthan, Josef
p. 2383 - 2399
(2007/10/02)
ELECTROPHILIC 3,5-SUBSTITUTION OF 2,4,4,6-TETRAPHENYL-4H-PYRAN AND SOME OF ITS 1-HETEROANALOGUES
The reaction of dibromine with the heterocycles I-IV gives corresponding 3,5-dibromo derivatives, while the less selective reactions with dichlorine afforded 3,5-dichloro derivative XII only in the case of 4H-thiopyran IV and trichloro derivative of the p
Shwarz, Marian,Sebek, Pavel,Kuthan, Josef
p. 546 - 555
(2007/10/02)
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