Metallorganische Innerkomplexe, III. Berylliumorganische Innerkomplexe vom Spirantyp

Abstract

Friihere Untersuchungen Uber metallorganische Innerkomplexe werden auf das Beryllium ausgedehnt. Die (spiranartigen) Verbindungen Berylliuni-bis-[6-methoxy-butyl] und Beryllium-bis-[y-athylmercapfo-propyl] werden synthetisiert, alsInnerkomplexe erwiesen und hinsichtlich ihrer Stabilitat untersucht. Die Darstellung von o-Brombenzyl-athylsulfid wird beschrieben.

Facile dissociation of BS coordination bonds in [2,6‐bis(ethylthiomethyl)phenyl]diethylborane by an SN2‐type mechanism

“…The kinetic data were obtained in four organic solvents with various polarities. By contrast, no lineshape changes were observed in the 1 H and 13 C NMR signals for 3 during the temperature change from room temperature to −90…”

“…The crude material was purified by HPLC with hexane-ethyl acetate 50:1 eluent to give the desired compound as colorless oil. Yield 402 mg (42%); 1 H NMR (CDCl 3 )δ = 0.80-0.92 (m, 10H), 1.29 (t, J = 7.6 Hz, 6H), 2.50 (q, J = 7.6 Hz, 4H), 3.84 (s, 2H), 7.06-7.15 (m, 3H); 13 …”

“…A solution of 2.00 g (8.66 mmol) of 1-bromo-2-(ethylthiomethyl)benzene [13] in 30 ml of dry ether was cooled to −78…”

Three types of reactions with intramolecular five-membered ring compounds in organic synthesis

“…The N,N-dimethylbenzylamines 1-5 (Eq. (23-1)), [42,55,56], N,N-dimethylbenzylamine derivatives [55,[57][58][59], N,N-dimethylaminomethylnaphthalenes (1-12, 1-13) [60], N,N-dimethylamino Scheme 2. methylruthenocene [61], N,N-dimethylaminomethylferrocenes (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17) [62,63] and others [61,64,65], are used as the substrates for the vinylation with alkyl vinyl compounds, aryl vinyl compounds, vinyl ketones, vinyl esters, vinyl nitriles, etc.…”

“…In 1955, Bähr and Müller [1][2][3] first published a report regarding organometallic intramolecular-coordination compounds which tend to form five-or six-membered ring compounds. They could not verify their intramolecular coordination states with analytical instruments such as IR and NMR spectroscopies at that time.…”