Ultrasound-promoted preparation of disteryl ethers catalyzed by montmorillonite K 10

In the presence of montmorillonite K 10, 5(6)-unsaturated sterols ( 1) were heated under ultrasound at 45°C in dichloromethane for 2–5.5 h to provide 3β,3′β-5(6)/5′(6′)-unsaturated disteryl ethers ( 2) in 35–79% yield. Meanwhile, 3α,3′α-diandrost-5-en-17-one-3-yl ether ( 3a) and 3α,3′α-dipregn-5-en-...

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Bibliographic Details
Published in:Ultrasonics sonochemistry 1998-06, Vol.5 (2), p.83-85
Main Authors: Li, Ji-Tai, Li, Tong-Shuang, Li, Li-Jun, Yang, Zi-Qin
Format: Article
Language:English
Subjects:
Catalysis
Catalytic reactions
Chemistry
Disteryl ethers
Exact sciences and technology
General and physical chemistry
Physical chemistry of induced reactions (with radiations, particles and ultrasonics)
Preparation
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
Ultrasonic chemistry
Ultrasound
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Summary:In the presence of montmorillonite K 10, 5(6)-unsaturated sterols ( 1) were heated under ultrasound at 45°C in dichloromethane for 2–5.5 h to provide 3β,3′β-5(6)/5′(6′)-unsaturated disteryl ethers ( 2) in 35–79% yield. Meanwhile, 3α,3′α-diandrost-5-en-17-one-3-yl ether ( 3a) and 3α,3′α-dipregn-5-en-20-one-3-yl ether ( 3b) were also obtained as by-products from 3β-hydroxyl-androst-5-en-17-one ( 1a) and 3β-hydroxyl-pregnan-5-en-20-one ( 1b) respectively.
ISSN:1350-4177
1873-2828
DOI:10.1016/S1350-4177(98)00010-8