ULTRASOUND-PROMOTED PREPARATION OF DISTERYL ETHERS CATALYZED BY MONTMORILLONITE-K-10

Authors
LI JT LI TS LI LJ YANG ZQ
Citation
Jt. Li et al., ULTRASOUND-PROMOTED PREPARATION OF DISTERYL ETHERS CATALYZED BY MONTMORILLONITE-K-10, Ultrasonics sonochemistry, 5(2), 1998, pp. 83-85
Citations number
12
Categorie Soggetti
Acoustics,Chemistry
Journal title
Ultrasonics sonochemistry → ACNP
ISSN journal
13504177
Volume
5
Issue
2
Year of publication
1998
Pages
83 - 85
Database
ISI
SICI code
1350-4177(1998)5:2<83:UPODEC>2.0.ZU;2-B
Abstract
In the presence of montmorillonite K 10, 5(6)-unsaturated sterols (1) were heated under ultrasound at 45 degrees C in dichloromethane for 2- 5.5 h to provide 3 beta,3'beta-5(6)/5'(6')-unsaturated disteryl ethers (2) in 35-79% yield. Meanwhile, 3 alpha,3'alpha-diandrost-5-en-17-one -3-yl ether (3a) and 3 alpha,3'alpha-dipregn-5-en-20-one-3-yl ether (3 b) were also obtained as by-products from 3 beta-hydroxyl-androst-5-en -17-one (la) and 3 beta-hydroxytpregnan-5-en-20-one (1b) respectively. (C) 1998 Elsevier Science B.V. All rights reserved.