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Ruthenium(II) Complexes with η6-Coordinated 3-Phenylpropanol and 2-Phenylethanol as Catalysts for the Tandem Isomerization/Claisen Rearrangement of Diallyl Ethers in Water
Organometallics ( IF 2.5 ) Pub Date : 2018-06-22 , DOI: 10.1021/acs.organomet.8b00187
Beatriz Lastra-Barreira 1 , Javier Francos 1 , Pascale Crochet 1 , Victorio Cadierno 1
Affiliation  

A series of half-sandwich ruthenium(II) complexes containing η6-coordinated 2-phenylethanol and 3-phenylpropanol ligands, namely [RuCl26-C6H5CH2(CH2)nCH2OH}(PR3)] (PR3 = PMe3, PPh3, P(OMe)3, P(OEt)3, P(OiPr)3, P(OPh)3; n = 0 (1af), 1 (2af)), have been investigated as catalysts for the tandem isomerization/Claisen rearrangement of diallyl ethers into γ,δ-unsaturated aldehydes using, for the first time, water as solvent. The best results in terms of activity and regioselectivity were obtained with the 3-phenylpropanol derivative [RuCl26-C6H5CH2CH2CH2OH){P(OEt)3}] (2d). Thus, using only 1 mol % of this complex, in combination with NaOH (2 mol %), different diallyl ethers could be conveniently converted into the corresponding aldehydes in high yields and short times under relatively mild thermal conditions (100 °C).

中文翻译:

钌(II)配合物的η 6配位的3-苯丙醇和2-苯基乙醇作为催化剂用于在水-二烯丙基醚的汇接异构化/ Claisen重排

一系列含有η半夹心钌(II)配合物的6配位的2-苯基乙醇和3-苯基丙醇配体,即将[RuCl 26 -C 6 H ^ 5 CH 2(CH 2Ñ CH 2 OH}(PR 3)](PR 3 = PMe 3,PPh 3,P(OMe)3,P(OEt)3,P(O i Pr)3,P(OPh)3n = 0(1af),1(2af))已被首次用作水为溶剂将二烯丙基醚串联异构化/克莱森重排成γ,δ-不饱和醛的催化剂。在活动和区域选择性方面的最佳结果与3-苯基丙醇衍生物获得将[RuCl 2(η 6 -C 6 H ^ 5 CH 2 CH 2 CH 2 OH){P(OET)3 }](2D)。因此,仅使用1 mol%的该配合物与NaOH(2 mol%)结合,就可以在相对温和的热条件下(100°C)以高收率和短时间将不同的二烯丙基醚方便地转化为相应的醛。
更新日期:2018-06-22
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