Substituent effects on the Bergman cyclization of (Z)‐1,5‐hexadiyne‐3‐enes: a systematic computational study
Substituent effects on the Bergman cyclization of (Z)‐1,5‐hexadiyne‐3‐enes: a systematic computational study
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取代基对 (Z)-1,5-己二炔-3-烯伯格曼环化的影响:系统计算研究
DOI:
10.1002/jcc.1114
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发表时间:
2001
影响因子:
3
通讯作者:
P. Schreiner
中科院分区:
文献类型:
--
作者:
M. Prall;A. Wittkopp;A. Fokin;P. Schreiner
The effects of several substituents (BH2, BF2, AlH2, CH3, C6H5, CN, COCH3, CF3, SiH3, NH2, NH3+, NO2, PH2, OH, OH2+, SH, F, Cl, Br) on the Bergman cyclization of (Z)‐1,5‐hexadiyne‐3‐ene (enediyne, 3) were investigated at the Becke–Lee–Yang–Parr (BLYP) density functional (DFT) level employing a 6‐31G* basis set. Some of the substituents (NH3+, NO2, OH, OH2+, F, Cl, Br) are able to lower the barrier (up to a minimum of 16.9 kcal mol−1 for difluoro‐enediyne 7rr) and the reaction enthalpy (the cyclization is predicted to be exergonic for OH2+ and F) compared to the parent system giving rise to substituted 1,4‐dehydrobenzenes at physiological temperatures. © 2001 John Wiley & Sons, Inc. J Comput Chem 22: 1605–1614, 2001
影响因子:
15
作者:
Jones, GB;Warner, PM
通讯作者:
Warner, PM