1979
DOI: 10.1016/s0040-4039(01)86564-3
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Generation of functionally substituted vinyllithium compounds - results and calculations

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Cited by 47 publications
(16 citation statements)
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“…Acrylic acid derivatives with a heteroatom (N, O, S, Hal) at C-3 can be cleanly deprotonated at this position with BuLi or LDA at low temperatures [329,[333][334][335][336][337][338] (Scheme 5.37). Some of these anions rearrange to the a-metalated acrylates on warming [329], but can also decompose (see Section 5.4.7).…”
Section: Vinylic Carbanionsmentioning
confidence: 99%
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“…Acrylic acid derivatives with a heteroatom (N, O, S, Hal) at C-3 can be cleanly deprotonated at this position with BuLi or LDA at low temperatures [329,[333][334][335][336][337][338] (Scheme 5.37). Some of these anions rearrange to the a-metalated acrylates on warming [329], but can also decompose (see Section 5.4.7).…”
Section: Vinylic Carbanionsmentioning
confidence: 99%
“…Some of these anions rearrange to the a-metalated acrylates on warming [329], but can also decompose (see Section 5.4.7). Non-heteroatom-substituted lithium b-lithioacrylate [329] or b-magnesioacrylic acid derivatives [339,340] have been prepared by bromine-lithium or halogen-magnesium exchange. 172 Scheme 5.…”
Section: Vinylic Carbanionsmentioning
confidence: 99%
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“…Darüber hinaus benötigen Ester-oder Nitril-Substituenten in Alkenen für eine Lithiierung Temperaturen zwischen À113 und À95 8C. [7] Hier zeigen wir, dass die kinetisch hoch aktiven TMP-Basen 1-4 eine sanfte Metallierung verschiedener substituierter Alkene des Typs 5 unter praktischen Reaktionsbedingungen und den Zugang zu hoch funktionalisierten ungesättigten Organometallverbindungen des Typs 6 ermöglichen (Schema 1).Fängt man diese mit verschiedenen Elektrophilen E + ab, erhält man funktionalisierte Alkene des Typs 7-9 mit hoher Chemoselektivität. Bemerkenswert ist, dass die Methode es erstmals ermöglicht, a-zinkierte Nitroalkene (6: FG 1 = NO 2 ; MX = ZnCl) und b-zinkierte Trifluormethylketone (6: FG 2 = COCF 3 ; FG 1 = NMe 2 ; MX = ZnCl) herzustellen (siehe Tabellen 1-3).…”
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