2008
DOI: 10.1021/ol800819h
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Diastereoselective Synthesis of Tetrahydrofurans via Palladium(0)-Catalyzed [3 + 2] Cycloaddition of Vinylcyclopropanes and Aldehydes

Abstract: Palladium(0)-catalyzed cycloadditions of malonate-derived vinylcyclopropane 1 and aldehydes to afford 2,5-cis disubstituted tetrahydrofuran derivatives are described. Pd loadings as low as 0.5 mol % were effective in catalyzing the transformation with high yields and diastereoselectivities. Electron-poor aldehydes work best, suggesting that a mechanism involving an initial aldol reaction may be operative.

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Cited by 156 publications
(81 citation statements)
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“…163 This reactivity is allowed by a Lewis acid activation, or by palladium catalysis. 164,165 The oxolanes obtained usually display a good cis-2,5-stereochemistry. An enantioselective version of this transformation was proposed by the group of Johnson, by M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT 32 means of deracemization of the starting aryl or vinyl cyclopropane through a dynamic kinetic asymmetric transformation.…”
Section: Thf Synthesis By Simultaneous C-o and C-c Bond Formationmentioning
confidence: 99%
“…163 This reactivity is allowed by a Lewis acid activation, or by palladium catalysis. 164,165 The oxolanes obtained usually display a good cis-2,5-stereochemistry. An enantioselective version of this transformation was proposed by the group of Johnson, by M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT 32 means of deracemization of the starting aryl or vinyl cyclopropane through a dynamic kinetic asymmetric transformation.…”
Section: Thf Synthesis By Simultaneous C-o and C-c Bond Formationmentioning
confidence: 99%
“…[28] In the case of vinyl-substituted cyclopropanes, activation with a palladium catalyst became possible, due to the formation of a stable -allyl intermediate. [29] The broad applicability of the method was further demonstrated in the total synthesis of natural products, including (+)-virgatusin, [30] (+)-polyanthellin A [31][32] and (+)-isatisine A [33][34] (Figure 7.1). Finally, Wang and coworkers developed intramolecular variations of this reaction to give both fused and bridged polycyclic systems and applied the method to a formal synthesis of platensimycin.…”
Section: C-o Bond Formationmentioning
confidence: 99%
“…[191] This reaction proceeded also with C-N cleavage, but with opposite regioselectivity and high diastereoselectivity. As the trifluoromethyl group is not able to stabilize a carbocation 29 intermediate, the reaction starts most probably by a nucleophilic SN 2 -like attack of the carbonyl on the less substituted carbon of the aziridine.…”
Section: Formal [3+1] Cycloadditionsmentioning
confidence: 99%
“…13 Reaction of this cyclopropane with commercially available β,2-dinitrostyrene ( 1 1 ) under conditions similar to those developed by Tsuji resulted in the formation of vinylcyclopentane 12 in 60% yield as a mixture of two inseparable diastereomers, (Scheme 3). 10 Upon zinc reduction of the diastereomeric mixture and in situ lactamization, two separable dihydroquinolinone products, 13a and 13b were obtained in 79% yield.…”
mentioning
confidence: 95%