Some common heterocyclic compound, 105-76-0, name is Dibutyl maleate, molecular formula is C12H20O4, traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route. 105-76-0
Example 2 Preparation of 3,6-dimethyl-2(3H)-benzofuranone by Means of Dehydrogenation Using Dibutyl Maleate as Hydrogen Acceptor A mixture of 1000 g of 5,6-dihydro-3,6-dimethyl-2(4H)-benzofuranone, 2000 ml of dibutyl maleate and 50 g of palladium-on-charcoal, 5% by weight, was heated for approx. 3 hours at 170 C. in an autoclave under autogenous pressure. After filtration, the product was purified by fractionating on an 80 cm packed column. Approx. 735 g of pure 3,6-dimethyl-2(3H)-benzofuranone were obtained at a b.p. of approx. 90 C. at 1 mbar.
These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 105-76-0, its application will become more common.
Reference:
Patent; Haarman & Reimer GmbH; US6391365; (2002); B1;,
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