✦ LIBER ✦

Norrish Type II photoreactivity of β-anisylalkanophenones and solvent effects on stereoselective Yang cyclization

✍ Scribed by Jarugu Narasimha Moorthy; Prasenjit Mal

Book ID: 104253205
Publisher: Elsevier Science
Year: 2003
Tongue: French
Weight: 172 KB
Volume: 44
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(03)00318-6

No coin nor oath required. For personal study only.

✦ Synopsis

In contary to the general notion that b-arylpropiophenones are photostable, photolysis of b-anisylketones 1 and 2 is found to result in Norrish Type II reactions; Yang cyclization affords two cyclobutanols in moderate yields (31-43%) in a highly stereoselective manner. The solvents are found to exert a dramatic influence on the relative ratios of the cyclobutanols in that the major product in a nonpolar solvent such as benzene becomes the minor one in a polar solvent such as acetonitrile or methanol.

📜 SIMILAR VOLUMES

Norrish Type II Photoreactivity of β-Ani

Norrish Type II Photoreactivity of β-Anisylalkanophenones and Solvent Effects on Stereoselective Yang Cyclization.

✍ Jarugu Narasimha Moorthy; Prasenjit Mal 📂 Article 📅 2003 🏛 John Wiley and Sons ⚖ 98 KB

## Abstract For Abstract see ChemInform Abstract in Full Text.

Synthesis of Bridged Bicyclic Ethers and

Synthesis of Bridged Bicyclic Ethers and Fused Oxetanes from Pyran-4-ones via Tandem Solvent Trapping and Norrish Type II Cyclization 1

✍ Fleming, Mike; Basta, Rehan; Fisher, Peter V.; Mitchell, Scott; West, F. G. 📂 Article 📅 1999 🏛 American Chemical Society 🌐 English ⚖ 57 KB

ChemInform Abstract: Synthesis of Bridge

ChemInform Abstract: Synthesis of Bridged Bicyclic Ethers and Fused Oxetanes from Pyran-4-ones via Tandem Solvent Trapping and Norrish Type II Cyclization.

✍ Mike Fleming; Rehan Basta; Peter V. Fisher; Scott Mitchell; F. G. West 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 30 KB

ChemInform Abstract: Influence of β-Sily

ChemInform Abstract: Influence of β-Silyl Groups in Cycloalkanones on the Norrish Type I and Type II Cleavages.

✍ J. R. HWU; B.-L. CHEN; L. W. HUANG; T.-H. YANG 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 30 KB

Expression of interleukin (IL) 1 type I

Expression of interleukin (IL) 1 type I and type II receptors in megakaryocytic cells and enhancing effects of IL-1β on megakaryocytopoiesis and NF-E2 expression

✍ Mo Yang; Karen Li; Cecilia Mei Yan Chui; Patrick Man Pan Yuen; Po Kwok Chan; Car 📂 Article 📅 2008 🏛 John Wiley and Sons 🌐 English ⚖ 602 KB

Role of mitogen-activated protein kinase

Role of mitogen-activated protein kinases and NFκB on IL-1β-induced effects on collagen type II, MMP-1 and 13 mRNA expression in normal articular human chondrocytes

✍ Zhiyong Fan; Huiqing Yang; Brigitte Bau; Stephan Söder; Thomas Aigner 📂 Article 📅 2006 🏛 Springer 🌐 English ⚖ 198 KB