Aryl-substituted piperazine derivatives are provided. Such compounds may be used to modulate MCH receptor activity in vivo or in vitro, and are particularly useful in the treatment of a variety of metabolic, feeding and sexual disorders in humans, domesticated companion animals and livestock animals. Pharmaceutical compositions and methods for treating such disorders are provided, as are methods for using such ligands for detecting MCH receptors (e.g., receptor localization studies).
Pd(II)-Mediated Alkynediol Spiroketalization: First Total Synthesis of (−)-Cephalosporolide E and (+)-Cephalosporolide F
作者:C. V. Ramana、Sharad B. Suryawanshi、Rajesh G. Gonnade
DOI:10.1021/jo802539z
日期:2009.4.3
Herein we describe a concise assembly of the central 1,6-dioxaspiro[4.4]nonane core of cephalosporolides E/F by employing a Pd-mediated alkynediol cycloisomerization and their total synthesis. On the basis of spectroscopic data and optical rotation values, the absolute configurations of cephalosporolides E/F were proposed.