A kind of method for preparing 4,4-diethyl pyrandicarboxylate derivative

A technology of diethylpyranedicarboxylate and diethylmalonate, which is applied in the field of synthesis of photoresist materials, can solve the problems of limited wide application, long reaction time, and low reaction yield, and achieve cheap and easy raw materials. High efficiency, short reaction time and simple operation
CN104910116BActive Publication Date: 2017-03-22VALIANT CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
VALIANT CO LTD
Publication Date
2017-03-22

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Abstract

The invention relates to a method for preparing diethyl 4,4-pyrandicarboxylate and derivatives thereof. The preparation method of the invention uses diethyl malonate and substituted dichloroethyl ether as raw materials, catalyzed by cuprous iodide, One or more mixtures in potassium tert-butoxide, sodium tert-butoxide, and sodium tert-amylate are alkali, and react, after the reaction is finished, the solvent is evaporated under reduced pressure, and then the distillation under reduced pressure is continued to obtain 4,4- Diethyl pyrandicarboxylate and its derivatives. The preparation method of the present invention has never been reported before, and the raw materials used are easy to obtain, the reaction method is simple and feasible, the reaction time is short, and has high application value and market value.
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Description

technical field

[0001] The invention relates to a method for preparing diethyl 4,4-pyrandicarboxylate and derivatives thereof, and belongs to the field of synthesis of photoresist materials. Background technique

[0002] In recent years, China's microelectronics and flat panel display industries have developed rapidly, driving the establishment and development of related supporting enterprises in the industrial chain such as photoresist materials. In particular, the rapid development of LED (light emitting diode) in 2009 has more effectively promoted the development of the photoresist industry. On the basis of the original discrete devices, IC, and LCD (liquid crystal display), China's photoresist industry market has added LEDs, coupled with the potential market for photovoltaics. By 2010, China's photoresist market will exceed 2 billion yuan. Accounting for more than 10% of the international photoresist market.

[0003] During the imaging process of the photoresist, due t...

Claims

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