SOLVENT EFFECTS ON ENDO/EXO SELECTIVITIES IN (4 + 2) CYCLOADDITIONS OF CYANOETHYLENES

被引:32
作者
KARCHER, T
SICKING, W
SAUER, J
SUSTMANN, R
机构
[1] UNIV ESSEN GESAMTHSCH,INST ORGAN CHEM,POSTFACH 103,W-4300 ESSEN 1,GERMANY
[2] UNIV REGENSBURG,INST ORGAN CHEM,W-8400 REGENSBURG,GERMANY
关键词
D O I
10.1016/S0040-4039(00)74708-3
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
SCRF calculations on transition structures of cycloadditions of acrylonitrile and maleonitrile to cyclopentadiene and 1,3-butadiene show that the experimentally observed endo preference for the cycloaddition of acrylonitrile to cyclopentadiene is the consequence of solvent influence and not the result of secondary orbital interactions.
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页码:8027 / 8030
页数:4
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