Room temperature operating allenylidene precatalyst [LnRu=C=C=CR2](+)X- for olefin metathesis:: dramatic influence of the counter anion X-

被引：95

作者：

Picquet, M ^{[1
]}

Touchard, D ^{[1
]}

Bruneau, C ^{[1
]}

Dixneuf, PH ^{[1
]}

机构：

[1] Univ Rennes 1, Lab Organomet & Catalyse, CNRS, UMR 6509, F-35042 Rennes, France

来源：

NEW JOURNAL OF CHEMISTRY | 1999年 / 23卷 / 02期

关键词：

D O I：

10.1039/a808859d

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The allenylidene-ruthenium(II) complex [(p-cymene)(PCy3)Cl-Ru=C=C=CPh2]X-+(-), 2a, (X- = CF3SO3-), which is produced in a one-pot reaction from commercially available [RuCl2(p-cymene)](2), catalyses the ring-closing metathesis of N,N-diallyltosylamide at room temperature whereas 2b (X- = BF4-) favours the cyclization of the 1,6-diene 3 into the five-membered heterocycle 5 without loss of atoms. The addition of BF3. OEt2 to 2b restores its selectivity in the RCM reaction. Catalyst 2a also promotes the metathesis of the ene-yne 6 to produce the 3-vinyl-2,5-dihydrofuran 7.

引用

页码：141 / 143

页数：3

共 32 条

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