- Diastereoselective Synthesis of 3,4-Benzomorphan Derivatives via Tandem [5 + 1]/Hemiaminalization of (2-Aminoaryl)divinyl Ketones
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A novel tandem formal [5 + 1]/hemiaminalization reaction based on the readily available (2-aminoaryl)divinyl ketones and various nucleophiles has been developed. The reaction represents a highly efficient and convenient methodology for the synthesis of 3,
- Li, Yifei,Feng, Chengjie,Shi, Hui,Xu, Xianxiu
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- Synthesis and Reactions of β-Enamino Phosphonium Salts. Preparation of 2-Vinyl-1-aza-1,3-dienes and Penta-1,4-dien-3-ones
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Reaction of N,P,P,P-tetraphenyl-λ5-phosphazene 1 and prop-2-ynyltriphenylphosphonium bromide 2 followed by addition of aliphatic, heteroaromatic and aromatic aldehydes leads to β-enamino phosphonium salts 7, while substituted tetrahydropyridines 9 are obtained when α,β-unsaturated aldehydes are used.Functionalized phosphonium salts 7 are precursors of Wittig reagents and act as intermediates in the synthesis of 2-vinyl-1-aza-1,3-dienes 11 and penta-1,4-dien-3-ones 12.
- Barluenga, Jose,Merino, Isabel,Palacios, Francisco
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p. 341 - 345
(2007/10/02)
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- ONE POT SYNTHESIS OF 2-VINYL-1-AZADIENES AND DIVINYLKETONES.
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Preparation of 2-vinyl-1-azadienes and 1,4-pentadien-3-ones from N-phenyl-triphenyl-λ5-phosphazene, triphenyl(prop-2-ynyl)phosphonium bromide and aldehydes is described.
- Barluenga, Jose,Merino, Isabel,Palacios, Francisco
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p. 5493 - 5496
(2007/10/02)
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