Zur reaktion von N-Hydroxysuccinimid mit dicyclohexylcarbodiimid

N-Hydroxysuccinimide reacts with dicyclohexylcarbodiimid in molar-proportion (3:1) forming dicyclohexylurea and succinimide oxycarbonyl-β-alanin-hydroxysuccinimid ester 7. The structure of 7 has been confirmed by NMR and chemical methods.     

Arylvanadium-verbindungen XI. Zur reaktion von trimesitylvanadium mit ketonen

Trimesitylvanadium in solution reacts with a series of ketones. Depending upon the structures of the ketones these reactions yield olefins, alcohols or a radical, respectively. Sterically hindered ketones only form coordination compounds with trimesitylvanadium or do not react at all.     

Reaktionen von fluoralkenen I. Zur nucleophilen reaktion von F-hept-1-en mit alkoholen

The reaction of F-hept-1-ene together with aromatic and aliphatic alcohols has been investigated. In the case of disodiumphenolsulfonate, $\text{trans}$-F-hept-2-enyl-1-oxybenzenesulfonate was formed, exclusively. The structure of this new fluorosurfactant was confirmed by means of ¹⁹FNMR. In contrast, phenoxide and alkoxide yield a mixture of products, including the isomers of allylic and vinylic substitution together with an addition product.     

Organoborierung von alkinylstannanen : V. Zur reaktion von dialkyldi-1-propinylstannanen mit trialkylboranen

Treatment of R′₂Sn(CCCH₃)₂ (R′ = CH₃, C₂H₅) with BR₃ (R = CH₃, C₂H₅, i-C₃H₇) gives 1-bora-4stannacyclohexadienes and 2,5-bis(dialkylboryl)-1-stannacyclopent-3-enes. The formation of the heterocycles depends in a complex manner upon the ratio of the starting compounds, upon the nature of groups R and R′ and also upon the solvent. The proposed structures are discussed on the basis of ¹H, ¹¹B, ¹³C and ¹¹⁹Sn NMR data.     

Zur reaktion von metallkoordiniertem kohlenmonoxid mit yliden: XIV. Eisenacyl-phosphor-ylide mit elektronenreicher organometallgruppierung

Treatment of [C₅Me₅(CO)₃Fe]BF₄ (I) with the phosphines Me₃P and Et₃P under thermal or photochemical conditions yields the novel iron salts [C₅Me₅-(CO)₂(R₃P)Fe]BF₄ (R = Me (IIa), R = Et (IIb)) and [C₅Me₅(CO)(Me₃P)₂Fe]BF₄ (IIc). The reaction of I and IIa with two mol of the ylide Me₃PCH₂ leads to the formation of the ironacyl-ylides C₅Me₅(CO)(L)FeC(O)CHPMe₃ (L = CO (IVa), Me₃P (IVb)). IVa selectively reacts at the “ylidic” carbon with the electrophilic reagents MeI, MeOSO₂F, Me₃SiOSO₂CF₃ to give the ironacyl-phosphonium salts [C₅Me₅(CO)₂FeC(O)CH(R)PMe₃] X (VaVc), while IVb is partially converted to [C₅Me₅(CO)₂FeC(O)CH₂PMe₃]BF₄ (IIIa) is obtained together with [C₅Me₅-(CO)₂Fe]₂ from I and IVa.     

Zur synthese von difluormethylethern verschieden substituierter pyrimidinnucleoside durch reaktion mit difluorcarben

The reaction of CF₂ with different substituted persilylated pyrimidine nucleosides either in the ribo-, 2′-deoxyrigo- or in the arabino-series gave the corresponding 4-0-difluoromethylethers. Optimum yields were obtained using Hg(CF₃)₂ as source of CF₂.     

Zur reaktion der silicium—phenyl-bindung mit HCl

Reaction of phenylisonitrile with (η⁵ -C₅H₅)₂ Fe₂(CO)₄ yields mono- and disubstituted derivatives. The latter has a doubly-bridged isonitrile structure both in solution and in the solid, where it has the trans-anti configuration.