CAS: 6099-90-7; Phloroglucinol Dihydrate

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CAS号66346-59-6 5,7-二羟基-4-丙基香豆素 | CAS号82747-44-2 5,7-dihydroxy-4...

专利信息

专利号:US-6262223-B1
优先权日:1999-02-03
标题:Triamine-modified polymides having improved processability and low melt flow viscocity
发明人：MEADOR MICHAEL A; NGUYEN BAOCHAU N; EBY RONALD K
权利人:US ADMINISTRATOR OF NAT AERONA
摘要:Addition-cured polyimides that contain the reaction product of an aromatic triamine or trianhydride analogue thereof, a reactive end group such as 5-norbornene-2, 3-dicarboxylic acid, ester derivatives of 5-norbornene-2,3-dicarboxylic acid, anhydride derivatives of 5-norbornene-2,3-dicarboxylic acid, or 4-phenylethynylphthalic anhydride, an aromatic diamine, and a dialkyl ester of an aromatic tetracarboxylic acid. The resultant starlike polyimides exhibit lower melt flow viscosity than its linear counterparts, providing for improved processability of the polyimide. Also disclosed are methods for the synthesis of these polyimides as well as composite structures formed using these polyimides.

专利号:US-2004106808-A1
优先权日:2000-12-22
标题:Processes for preparing calanolide a and intermediates thereof
发明人：TERASHIMA SHIRO; KOYAKUMARU KENICHI
摘要:The present invention provides a production method of Calanolide A according to the following method n n n wherein each symbol is as defined in the specification, as a more convenient and industrially practical method for the synthesis of Calanolide A from an easily available starting material.

专利号:US-3770833-A
优先权日:1970-03-30
标 题 :Method for producing 3,5-dialkoxyphenols
发明人：BADER H; JAHNGEN E
权利人:POLAROID CORP
摘要:AN IMPROVED PROCESS FOR PRODUCING 3,5-DIALKOXYPHENOLS USEFUL AS INTERMEDIATES IN THE SYNTHESIS OF METAL COMPLEXED AZOMETHINE DYES. ESSENTIALLY, THE PROCESS INVOLVES HEATING A MIXTURE OF PHLOROGLUCINAL (1,3,5-BENZENETRIOL) AND AN ALCOHOL HAVING FROM 1-8 CARBON ATOMS IN THE PRESENCE OF AN AZEOTROPIC MEDIUM AND AN ACID CATALYST.

专利号:CN-108947787-A
优先权日:2018-07-23
标题:A kind of total synthesis method of natural product pseudocequool

专利号:CN-115612114-A
优先权日:2021-07-14
标 题:Method and application of copolymer film and its enzymatic self-assembly synthesis

专利号:CN-1120839-C
优先权日:1999-11-22
标 题 :Synthesis and application of 5,7-dihydroxy-4'-benzyloxyflavanone