VITAMIN D RECEPTOR ACTIVATORS AND METHODS OF MAKING
申请人:Von Geldern Thomas W.
公开号:US20090131379A1
公开(公告)日:2009-05-21
The invention relates to compounds that are vitamin D receptor activators, compositions comprising such compounds, methods of using such compounds and compositions, processes for preparing such compounds, and intermediates obtained during such processes.
Vitamin D receptor activators and methods of making
申请人:Von Geldern Thomas W.
公开号:US08377913B2
公开(公告)日:2013-02-19
The invention relates to compounds that are vitamin D receptor activators, compositions comprising such compounds, methods of using such compounds and compositions, processes for preparing such compounds, and intermediates obtained during such processes.
The synthesis of two potent osteoclast-forming suppressing agents isolated from the Chinese mushroom Agrocybe chaxingu, demethylincisterol A(3) and chaxine A. was accomplished using ergocalciferol as the starting material. Our methodology for the synthesis of demethylincisterol A(3) and chaxine A featured the construction of a butenolide moiety by the intramolecular Horner-Wadsworth-Emmons reaction under Masamune-Roush conditions. This is the first reported synthesis of chaxine A. (C) 2011 Elsevier Ltd. All rights reserved.
Windaus; Grundmann, Justus Liebigs Annalen der Chemie, 1936, vol. 524, p. 295,299