✦ LIBER ✦

Photochemistry of β-hydroxy-γ-pyrone. A new synthesis of 3-methylcyclopent-2-en-2-ol-1-one from maltol

✍ Scribed by Masao Shiozaki; Tetsuo Hiraoka

Publisher: Elsevier Science
Year: 1972
Tongue: French
Weight: 166 KB
Volume: 13
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(01)94390-4

No coin nor oath required. For personal study only.

✦ Synopsis

While photorearrangements of cross-conjugated cyclic dienones are well knownl, the photochemistry of If-pyrone is limited in its utility since a complex rearrangement was encountered in addition to dime-.zation. 2 This complexity depends upon the nature of an intermediate zwitterion, whose intermolecular nucleophilic trapping was achieved in the cyclohexadienone system by Schuster et al. 3 This evidence suggests that intramolecular quenching of the zwitterion generated from p-pyrone by photochemistry would give a clear-cut product. Thus a hydroxyl group situated at the S-position in a r-pyrone derivative would be

📜 SIMILAR VOLUMES

One-Pot Synthesis of a New Series of 3-A

One-Pot Synthesis of a New Series of 3-Alkoxy-5-hydroxy-5-trifluoromethylpyrrolidin-2-ones from 1,1,1-Trifluoro-4-alkoxyalk-3-en-2-ones.

✍ Nilo Zanatta; Luciana S. Rosa; Maria F. M. Cortelini; Simone Beux; Ana P. D. San 📂 Article 📅 2003 🏛 John Wiley and Sons ⚖ 136 KB 👁 2 views

Synthesis of New 3-(2,2,2-Trifluoroethyl

Synthesis of New 3-(2,2,2-Trifluoroethyl)-5-hydroxy-5-(phenylsulfanyl- or phenylsulfonyl-methyl)-1,5-dihydropyrrol-2-ones Starting from α,β-Unsaturated γ-Lactones and Primary Amines.

✍ Jean-Philippe Bouillon; Yuriy Shermolovich; Sergiy Mukhaylychenko; Dominique Har 📂 Article 📅 2007 🏛 John Wiley and Sons ⚖ 22 KB 👁 1 views

A new use of the birch reduction. Synthe

A new use of the birch reduction. Synthesis of 2,3-disubstituted cyclopent-2-en-1-ones from 6-methoxyindanone

✍ Christopher J. Moody; Judy Toczek 📂 Article 📅 1986 🏛 Elsevier Science 🌐 French ⚖ 112 KB

Synthesis of New 3-(1-Ethylsulfanyl-2-pe

Synthesis of New 3-(1-Ethylsulfanyl-2-perfluoroalkyl)-5-hydroxy-5-methyl (or 5-phenyl)-1,5-dihydro-pyrrol-2-ones Starting from γ-Keto Thioesters and Amines.

✍ Jean-Philippe Bouillon; Bernard Tinant; Jean-Marc Nuzillard; Charles Portella 📂 Article 📅 2004 🏛 John Wiley and Sons ⚖ 145 KB 👁 1 views

ChemInform Abstract: Synthesis of Carbas

ChemInform Abstract: Synthesis of Carbasugars from Aldonolactones. Part 3. A Study on the Allylic Substitution of (1R,5R,8R)- and (1R,5R,8S)-8-Hydroxy-2-oxabicyclo[3.3.0]oct-6-en-3-one Derivatives. Preparation of (1S,2R,3R)-9- [2-Hydroxy-3-(2-hydroxyethyl)cyclopent-4-en-1-yl]-9H-adenine.

✍ Steen K. Johansen; Inge Lundt 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 26 KB 👁 2 views

Synthesis of (±)-E-(1,2,4-trihydroxy-2,6

Synthesis of (±)-E-(1,2,4-trihydroxy-2,6,6-tirmethylcyclohexyl)-but-3-en-2-one: A novel degraded carotenoid isolated from New Zealand thyme (thymus vulgaris) honey

✍ Susan J. Broom; Richard M. Ede; Alistair L. Wilkins 📂 Article 📅 1992 🏛 Elsevier Science 🌐 French ⚖ 228 KB