- ROMPgel-Supported Triphenylphosphine with Potential Application in Parallel Synthesis
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(Equation Presented) ROMPgel-supported triphenylphosphine was synthesized in three steps (67%) from norbornadiene, 4-bromoiodobenzene, and chlorodiphenylphosphine. The supported reagent has a high loading (2.5 mmol/g) and favorable swelling properties in organic solvents. It has been utilized for the conversion of alcohols to halides, the reduction of ozonides, and the isomerization of α,β-acetylenic esters and in the Staudinger reaction. In general, filtration of the resin from the reaction mixtures and evaporation gave the corresponding products in high yield and purity.
- Arstad, Erik,Barrett, Anthony G. M.,Hopkins, Brian T.,Koebberling, Johannes
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p. 1975 - 1977
(2007/10/03)
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- Lewis acid catalyzed Diels-Alder reactions of two useful dienyl phosphate esters
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The Lewis acid catalyzed Diels-Alder reactions of dienyl phosphate esters 1 and 2 were examined. 2-Diethylphosphoryloxy-1,3-butadiene (1) was found to react with a variety of α,β-unsaturated carbonyl compounds under Lewis acid catalysis with excellent reg
- Liu, Hsing-Jang,Feng, Waiseng Martin,Kim, Jeung Bea,Browne, Eric N. C.
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p. 2163 - 2175
(2007/10/02)
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- THE LEWIS ACID CATALYZED DIELS-ALDER REACTION OF 2-DIETHYLPHOSPHORYLOXY-1,3-BUTADIENE, AN OXYGEN-SUBSTITUTED DIENE OF UNUSUAL STABILITY
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The title compound 2 was shown to be a useful oxygen-substituted diene in the Lewis acid catalyzed Diels-Alder reaction.It reacts with a variety of dienophiles under mild conditions with excellent regioselectivity.
- Liu, Hsing-Jang,Feng, Waiseng Martin
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p. 1777 - 1786
(2007/10/02)
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- Selective catalyzed-rearrangement of terminal epoxides to methyl ketones
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Terminal epoxides of the type {A figure is presented} have been selectively converted into methyl ketones by various catalysts. Some lanthanide derivatives, MnI2, and Co2(CO)8 gave the best results. The rearrangement of internal epoxides into ketones is much slower, allowing specific transformation of terminal epoxides. The scope of the reaction and tentative mechanisms are discussed.
- Prandi,Namy,Menoret,Kagan
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p. 449 - 460
(2007/10/02)
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