2007
DOI: 10.1021/ol063031t
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Gold(I)-Catalyzed Isomerization of Allenyl Carbinol Esters:  An Efficient Access to Functionalized 1,3-Butadien-2-ol Esters

Abstract: A study concerning the gold(I)-catalyzed rearrangement of diversely substituted allenyl carbinol esters into functionalized 1,3-butadien-2-ol esters is described. The mild conditions employed allow the efficient, rapid, and stereoselective synthesis of a variety of such compounds via a new 1,3-shift of an ester moiety onto a gold-activated allene. [structure: see text]

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Cited by 91 publications
(43 citation statements)
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“…[47] [138] Allenylcarbinolester können auch eine 3,3-Umlagerung durchlaufen; in Gegenwart des sperrigen Komplexes [Au-(1 b)]NTf 2 resultiert diese Isomerisierung in 1,3-Butadienyl-2-olestern. [139] Während [142] das Goldtriflimidat [Au(1 b)]NTf 2 oder PtCl 2 ergaben geringere Ausbeuten. Das Cyclopropyladdukt 33 wurde als Zwischenverbindung in der Totalsynthese eines neuen Allocolchicinoid-Derivats verwendet.…”
Section: Reaktivität Von Propargyl-und Allencarboxylatenunclassified
“…[47] [138] Allenylcarbinolester können auch eine 3,3-Umlagerung durchlaufen; in Gegenwart des sperrigen Komplexes [Au-(1 b)]NTf 2 resultiert diese Isomerisierung in 1,3-Butadienyl-2-olestern. [139] Während [142] das Goldtriflimidat [Au(1 b)]NTf 2 oder PtCl 2 ergaben geringere Ausbeuten. Das Cyclopropyladdukt 33 wurde als Zwischenverbindung in der Totalsynthese eines neuen Allocolchicinoid-Derivats verwendet.…”
Section: Reaktivität Von Propargyl-und Allencarboxylatenunclassified
“…The protocol tolerated a range of substitution at the allenyl carbon atoms. Gagosz has reported the stereoselective gold(I)-catalyzed isomerization of a-allenyl esters to form 1,3-butadien-2-ol esters [117]. As an example, treatment of a-allenyl Toste has demonstrated the hydroalkoxycarbonylation of b-allenyl carboxylic acid derivatives catalyzed by a mixture of a chiral, enantiomerically pure bis(gold) complex and a chiral, enantiomerically enriched silver phosphonate salt [107].…”
Section: Carboxylic Acid Derivatives As Nucleophilesmentioning
confidence: 99%
“…For example, in the gold(I)-catalyzed isomerization of allenyl carbinol ester, 31 the resulting product can be hydrolyzed by the trace water present in the presence of acid. But we can overcome this problem by simply using less than 1 equiv of acid activator or by choosing a milder Lewis acid (Scheme 6c).…”
mentioning
confidence: 99%