Kinetic resolution of racemic planar-chiral vinylcymantrenes by molybdenum-catalyzed asymmetric metathesis dimerization

• Haruna Imazu,
• Hitoshi Izu,
• Yasuhiro Ohki and
• Masamichi Ogasawara

Beilstein J. Org. Chem. 2026, 22, 568–574, doi:10.3762/bjoc.22.42

• , that is the asymmetric metathesis dimerization (AMD; Scheme 1), was developed by our group during 2022–23 [30][31]. In the previous reports, racemic planar-chiral vinylferrocene [30] or vinylphosphaferrocene derivatives [31] were employed as substrates for the AMD process. In the presence of an

• , vinylferrocene [30], and vinylphosphaferrocene [31]) in the AMD/KR reactions using Mo/(R)-L1. The views of the molecules from the view point opposite to the central metal cations (Mn(I) or Fe(II)) are illustrated at the bottom of Figure 2. All the three compounds possess the similar structural features: (1

• ). Structures of less-reactive enantiomers in three representative planar-chiral vinylmetallocene substrates in Mo/(R)-L1-catalyzed AMD/KR. Asymmetric metathesis dimerization/kinetic resolution of racemic planar-chiral vinylferrocene/vinylphosphaferrocene. Preparation of racemic planar-chiral vinylcymantrene

Recent advances in allylation of chiral secondary alkylcopper species

• Minjae Kim,
• Gwanggyun Kim,
• Doyoon Kim,
• Jun Hee Lee and
• Seung Hwan Cho

Beilstein J. Org. Chem. 2025, 21, 639–658, doi:10.3762/bjoc.21.51

• styrenes with diverse electronic properties as well as those containing sensitive functional groups such as esters, amides, and vinyl halides, to yield the desired β-chiral olefins in high enantioselectivity. Notably, the methodology could even be applied to vinylferrocene and vinylsilane derivatives

A new approach to ferrocene derived alkenes via copper-catalyzed olefination

• Vasily M. Muzalevskiy,
• Aleksei V. Shastin,
• Alexandra D. Demidovich,
• Namiq G. Shikhaliev,
• Abel M. Magerramov,
• Victor N. Khrustalev,
• Rustem D. Rakhimov,
• Sergey Z. Vatsadze and
• Valentine G. Nenajdenko

Beilstein J. Org. Chem. 2015, 11, 2072–2078, doi:10.3762/bjoc.11.223

• the synthesis of the first polymer based on vinylferrocene [3], the chemistry of ferrocene and its derivatives is developing very rapidly. Ferrocene derivatives are widely applied in industry, for example, diethylferrocene is a combustion accelerator used as additive to gasoline [4]. There are many

Free radical homopolymerization of a vinylferrocene/cyclodextrin complex in water

• Helmut Ritter,
• Beate E. Mondrzik,
• Matthias Rehahn and
• Markus Gallei

Beilstein J. Org. Chem. 2010, 6, No. 60, doi:10.3762/bjoc.6.60

• University of Darmstadt, Petersenstrasse 22, D-64287 Darmstadt, Germany 10.3762/bjoc.6.60 Abstract We report the radical initiated homopolymerization of a soluble vinylferrocene cyclodextrin-complex in water. Uncomplexed vinylferrocene 1 and the corresponding homopolymer are hydrophobic and completely

• scanning calorimetry (DSC), and lower critical solution temperature (LCST) measurements. Keywords: cyclodextrin; free radical polymerization; polyvinylferrocene; vinylferrocene; Introduction Since its discovery in 1951, ferrocene [1] and its derivatives and their applications have been the subject of

• numerous papers [2][3][4][5][6][7]. One derivative, vinylferrocene 1, is of particular interest because of its anionic and radical polymerization behavior [8][9][10][11][12]. Due to its electrical semiconductivity properties the polymer of 1 has several practical applications. It is mainly used in