A new method for cleavage of silicon–carbon linkers on glass plate supports with applications to solid-phase syntheses on silica resins
摘要:
We describe herein a novel and facile method for the cleavage of a silicon-based linker on solid-phase supports such as glass plates or silica resin. The linker was efficiently cleaved by oxidation of the silicon-carbon bond (Tamao-Kumada oxidation) to release the functionalized molecule. (C) 2010 Elsevier Ltd. All rights reserved.
A new method for cleavage of silicon–carbon linkers on glass plate supports with applications to solid-phase syntheses on silica resins
摘要:
We describe herein a novel and facile method for the cleavage of a silicon-based linker on solid-phase supports such as glass plates or silica resin. The linker was efficiently cleaved by oxidation of the silicon-carbon bond (Tamao-Kumada oxidation) to release the functionalized molecule. (C) 2010 Elsevier Ltd. All rights reserved.
Novel synthesis of CP-734432, an EP4 agonist, using Sharpless asymmetric dihydroxylation
作者:Sajiv K. Nair、Jean J. Matthews、Stephan J. Cripps、Chunrong Ma、Elena Z. Dovalsantos、Alan W. Grubbs、Neal W. Sach、Wolter ten Hoeve、Han Koster、Erik J. Flahive、Steven P. Tanis、Matt Renner、Jim van Wiltenburg
DOI:10.1016/j.tetlet.2009.12.092
日期:2010.3
A novel and efficient asymmetric route to CP-734432, a lactam analog of PGE2, that shows selective agonism against the EP4 receptor subtype, is reported herein. The key steps include a Heck coupling to introduce the aryl ring at C-16 and a highly diastereoselective Sharpless asymmetric dihydroxylation to set the C-15 center. (C) 2009 Elsevier Ltd. All rights reserved.