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Identifier

uch.chemistry.msc//2004tsagkarakis

Title

Κυκλοποίηση μικρών τερπενοειδών καταλυομένη από το ζεόλιθο ΜΥ

Alternative Title

Cyclization of small terpenoids catalyzed by zeolite my

Creator

Tsangarakis, Constantinos

Abstract

In the present Thesis was studied the ability that acidic porous materials such as zeolites NaY and HY to catalyze the biomimetic cyclization of small terpenoids. Preliminary results showed that the slightly acidic zeolite NaY and the acidic zeolite HY catalyze the biomimetic cyclization of small terpenes such as geraniol, geranyl or neryl acetate to forming cyclogeranic analogs in yields greater than 70%. The cyclization of farnesyl acetate formed drimenic derivatives in low yield (~25%). The most impressive result of the catalytic activity of zeolites is the one step formation of natural product α-ambrinol with high diastereoselectivity and good yield (70%), during the cyclization of geranyl or neryl acetone. The cyclization of farnesal leads to the selective formation of monocyclic, bicyclic or polycyclic derivatives depending on the structure of zeolite MY. By contrast, the ClSO3H-catalyzed cyclization of farnesal provides exclusively monocyclization products.

Subject

ζεόλιθος, τερπένια, ετερογενής κατάλυση, πράσινη χημεία, α-αμπρινόλη, zeolite, terpenes, heterogeneous catalysis, green chemistry, α-ambrinol

Issue date

2004-00-01

Date available

2007-11-01

Collection

School/Department--School of Sciences and Engineering--Department of Chemistry--Post-graduate theses

Type of Work--Post-graduate theses

Views

184

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