Results 291 to 300 of about 157,130 (323)

Selective cycloadditions

Nature Chemistry, 2023
Bo Zhang, Hui Ming Ge
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[2+2]Cycloaddition

1994
Die thermische [2+2]Cycloaddition von Alkenen 1 ist nach den Woodward-Hoffmann-Regeln 1) suprafacial symmetrieverboten und kann nur in speziellen Fallen erfolgreich durchgefuhrt werden. Hingegen ist das photochemische Pendant erlaubt und wird als praparativ wertvolle Methode zur Bildung von Vierringsystemen 2 vielfaltig genutzt.2–4)
Thomas Laue, Andreas Plagens
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Cycloaddition Reactions

2010
This chapter deals with enantioselective organocatalytic cycloaddition reactions. Several cinchona alkaloids have been recently demonstrated as efficient chiral organocatalysts for enantioselective Diels−Alder reactions. Thus, excellent results were obtained for the Diels−Alder reaction of 3-vinylindoles with maleimides catalysed by a ...
S. Araki, T. Hirashita
  +4 more sources

Cycloadditions and Cycloreversions I. [2+2]-Cycloaddition

1992
It was pointed out in the preceding chapter that correlation diagrams can be read from right to left as easily as from left to right. This is certainly true from the formal viewpoint of orbital symmetry, but does not preclude the need to examine the geometric and energetic consequences of the nuclear motions involved.
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Cycloadditions

2012
K. Hof, K. M. Lippert, P. R. Schreiner
  +4 more sources

Cycloadditions

1998
Houda Fillion, Jean-Louis Luche
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Cycloaddition

2010
S. Araki, T. Hirashita
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Cycloaddition

2004
T. Ooi, K. Maruoka
openaire   +1 more source

Cycloaddition

2007
C. Cordier, S. Leach, A. Nelson
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Cycloadditions

2011
K. Ohmatsu, T. Ooi
openaire   +1 more source