- Gold(i)-catalyzed dehydrogenative cycloisomerization of 1,5-enynes
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The gold(i)-catalyzed dehydrogenative cycloisomerization of cyclopropane-tethered 1,5-enynes proceeded smoothly to give multisubstituted benzene derivatives in good to excellent yields. Synthetically important benzocyclobutenes can be produced in high yields in the presence of a gold(i) catalyst and DDQ. Furthermore, this reaction also works very well for non-cyclopropane tethered 1,5-enynes.
- Chen, Gen-Qiang,Fang, Wei,Wei, Yin,Tang, Xiang-Ying,Shi, Min
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supporting information
p. 10799 - 10802
(2016/09/07)
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- The Triplex Diels-Alder Reaction: Intramolecular Cycloaddition of Phenyl-Substituted Alkenes to 1,3-Dienes
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The triplex Diels-Alder reaction of dienes and styrene-like dienophiles that are covalently linked with a flexible alkyl chain was investigated.Sensitization with 9,10-dicyanoanthracene in benzene solution leads to good yields of adducts when the di
- Woelfle, Ingrid,Chan, Samantha,Schuster, Gary B.
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p. 7313 - 7319
(2007/10/02)
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- Dehydration of 1-Substituted Secondary and Tertiary Bicyclononan-9-ols. A Substituent-Driven Rearrangement to 4-Substituted and/or Angularly Substituted Hexahydroindenes
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The acid-catalyzed dehydration of substituted bicyclononan-9-ols (1-9) has been studied as a route to substituted hexahydroindenes via skeletal rearrangement.The nature of the substituent at C1 strongly affects the rearrangement.Thus 1-substituted secondary alcohols 1-3 (R = Ph, CH3, H) afford 4-substituted 2,3,4,5,6,7-hexahydroindenes 1b-3b, while a mixture of 3a-carbethoxyhexahydroindenes (4a,b) is produced from 4 (R = CO2Et).Tertiary alcohols 5-9 afford cis-3a-substituted 2,3,3a,6,7,7a-hexahydroindenes 1a-9a.These processes are discussed in terms of relative stabilities of the intermediate carbonium ions.
- Balata, Fabrizio,Jacono, Anna R. Dello,Gambacorta, Augusto
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p. 566 - 570
(2007/10/02)
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