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Vinyl- and Divinylcyclopentadienes by Rhodium-Catalyzed Condensation of Alkynes with Cross-Conjugated Amino Metallahexatrienes [= (1-Amino-1,3-butadien-2-yl)carbene Complexes] (M = Cr, W)

✍ Scribed by Rudolf Aumann; Inigo Göttker-Schnetmann; Roland Fröhlich; Oliver Meyer

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
688 KB
Volume
1999
Category
Article
ISSN
1434-193X

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✦ Synopsis

We report on the first example of a transition metal-catalyzed cyclohex-1-enyl, isopropenyl, methoxymethyl, 1-trimethylsiloxycyclohex-1-yl) in the presence of catalytic amounts of cyclization reaction of a Fischer carbene complex. It comprises the generation of vinyl-and divinyl cyclopentadienes under [(COD)RhCl] 2 . The starting compounds 3 are accessible in high yields by addition of enamines (E)-R 2 NCH=CHR 2 2 to (1-exceedingly mild conditions at 20 °C by condensation of (1amino-1,3-butadien-2-yl)carbene complexes (= cross-conju-alkynyl)carbene complexes (CO) 5 M=C(OEt)CϵCR 1 1 (M = Cr, W; R 1 = Ph, cyclohex-1-enyl). gated metallahexatrienes) (CO) 5 M=C(OEt)C(=CHNR 2 )CR 1 = CHR 2 3 (M = Cr, W) with alkynes R 3 CϵCH 4 (R 3 = Ph, C bond (and CϭC bond, respectively) of 1-metalla-1,3-[ ] Part IC: Ref.

📜 SIMILAR VOLUMES

Vinyl- and Divinylcyclopentadienes by Rh
Vinyl- and Divinylcyclopentadienes by Rhodium-Catalyzed Condensation of Alkynes with Cross-Conjugated Amino Metallahexatrienes [= (1-Amino-1,3-butadien-2-yl)carbene Complexes] (M = Cr, W)
✍ Rudolf Aumann; Inigo Göttker-Schnetmann; Roland Fröhlich; Oliver Meyer 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 110 KB 👁 1 views

Table 2 on page 2547 is erroneously identical to Table 1 on the same page. The correct Table 2 is printed below. Table 2. Vinylcyclopentadienes 5 by condensation of alkynes 4 with cross-conjugated tungstahexatrienes 3aϪe [a] Isolated yield in%, in THF/EtOH (5:1), 2.5 mol-% [(COD)RhCl] 2 , after 28Ϫ