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Volume 5, Issue 3 (Suppl)
Mod Chem Appl, an open access journal
ISSN: 2329-6798
Global Chemistry 2017
September 04-06, 2017
September 04-06, 2017 | London, UK
5
th
Global Chemistry Congress
DBU/H
2
O as an efficient, eco-friendly and inexpensive catalyst for trans-esteri cation and trans-
acylation reactions
Elahe Akbarzadeh
Islamic Azad University, Islamshahr Branch, Iran
T
ransesterification or alcoholysis reaction in the production of alkyl esters or biodiesel is the process of exchanging alkoxy
moiety between two carboxyl groups which is often superior to direct synthesis of esters from carboxylic acids and
alcohols. This method especially can applicable for labile and difficult to separate carboxylic acids, polymerization of lactones,
the preparation of oils and fats, the curing of alkyd resins in the paint industry, and the preparation of polyesters [1, 2]. There
are several available procedures in the literature as catalysts for this reaction [3,4]. However, many of the present methods
have drawbacks and disadvantages such as long reaction times, harsh reaction conditions, toxicity and difficulty in product
isolation. We recently reported the use of mild Lewis acid for efficient room-temperature transesterification and transacylation
reactions [5]. Also, we introduced aqueous organocatalysts for dihydrothiopyran-4-one system conducting parallel competitive
MBH and diastereoselective aldol reactions [6]. Based on these achievements and in continuation of our previous experiences,
we would like to report here a simple and convenient transesterification and transacylation procedure conducted at room-
temperature under DBU/H2O catalysis. These reactions proceed at room temperature in suspension of an ester and alcohol
through catalytic quantities of DBU. Completion of the reaction followed by TLC or GC experiments and the structure of the
products assigned based on their spectroscopic data.
In summary, we have demonstrated that a very stable and mild reagent which can undergoes rapid reaction under mild and
eco-friendly conditions with high yields. The products are directly obtained from the reaction mixtures by evaporation of the
volatile portion.
akbarzadeh.elaheh@yahoo.comMod Chem Appl 2017, 5:3(Suppl)
DOI: 10.4172/2329-6798-C1-006