Stereoselective synthesis of the chemoattractant sperm-activating and attracting factor (SAAF), isolated from the eggs of the ascidian Ciona intestinalis, was achieved via reductive 1,3-transposition of an allylic alcohol and the axial opening of an epoxide as key steps. This second-generation synthesis improved the total yield of SAAF over that of the first-generation synthesis and provided a key intermediate for synthesizing molecular probes of SAAF. (C) 2010 Elsevier Ltd. All rights reserved.
A Photocleavable Masked Nuclear‐Receptor Ligand Enables Temporal Control of
<i>C. elegans</i>
Development
作者:Joshua C. Judkins、Parag Mahanti、Jacob B. Hoffman、Isaiah Yim、Adam Antebi、Frank C. Schroeder
DOI:10.1002/anie.201307465
日期:2014.2.17
The development and lifespan of C. elegans are controlled by the nuclear hormone receptor DAF‐12, an important model for the vertebrate vitamin D and liver X receptors. As with its mammalian homologues, DAF‐12 function is regulated by bile acid‐like steroidal ligands; however, tools for investigating their biosynthesis and function in vivo are lacking. A flexible synthesis for DAF‐12 ligands and masked