Multi-Pathway Consequent Chemoselectivities of CpRuCl(PPh(3) )(2) /MeI-Catalysed Norbornadiene Alkyne Cycloadditions.
Multi-Pathway Consequent Chemoselectivities of CpRuCl(PPh(3) )(2) /MeI-Catalysed Norbornadiene Alkyne Cycloadditions.
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CpRuCl(PPh3)(2)/MeI 催化降冰片二烯炔环加成的多途径化学选择性
DOI:
10.1002/chem.201603173
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发表时间:
2016-10-17
影响因子:
4.3
通讯作者:
Chass, Gregory A.
中科院分区:
文献类型:
--
作者:
Mu, Wei-Hua;Fang, De-Cai;Xia, Shu-Ya;Cheng, Rui-Jiao;Chass, Gregory A.
Chemoselectivities of five experimentally realised CpRuCl(PPh3)2/MeI‐catalysed couplings of 7‐azabenzo‐norbornadienes with selected alkynes were successfully resolved from multiple reaction pathway models. Density functional theory calculations showed the following mechanistic succession to be energetically plausible: (1) CpRuI catalyst activation; (2) formation of crucial metallacyclopentene intermediate; (3) cyclobutene product (P2) elimination (ΔG Rel(RDS)≈11.9–17.6 kcal mol−1). Alternative formation of dihydrobenzoindole products (P1) by isomerisation to azametalla‐cyclohexene followed by subsequent CpRuI release was much less favourable (ΔG Rel(RDS)≈26.5–29.8 kcal mol−1). Emergent stereoselectivities were in close agreement with experimental results for reactions a, b, e. Consequent investigations employing dispersion corrections similarly support the empirical findings of P1 dominating in reactions c and d through P2→P1 product transformations as being probable (ΔG≈25.3–30.1 kcal mol−1).
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影响因子:
3
作者:
Grimme, Stefan
通讯作者:
Grimme, Stefan
影响因子:
4.4
作者:
Peterson, KA;Figgen, D;Dolg, M
通讯作者:
Dolg, M
影响因子:
--
作者:
GONZALEZ, C;SCHLEGEL, HB
通讯作者:
SCHLEGEL, HB
影响因子:
1.8
作者:
Johnstone, Mark D.;Lowe, Adam J.;Pfeffer, Frederick M.
通讯作者:
Pfeffer, Frederick M.
影响因子:
3.6
作者:
Liu, Liu;Wu, Yile;Zhao, Yufen
通讯作者:
Zhao, Yufen