Equilibrium Between Methyl-Acences and Methylenedihydroacenes
作者:E. CLAR、J. W. WRIGHT
DOI:10.1038/163921a0
日期:1949.6
TAUTOMERISM beween methyl-acenes (I, II, III, IV, V) and methylene-dihydroacenes (la, Ila, IIIa, IVa, Va, respectively) has often been postulated to explain side -chain reactivity of aromatic compounds but hitherto no methylene-dihydroacene has beprt isolated. This weakness in the hypothesis has rfow been removed by the synthesis of pure 6-methylene-6 : 13-dihydropentacene (Va). The 'anellation principle'1
申请人:KNU-Industry Cooperation Foundation 강원대학교산학협력단(220040088571) BRN ▼221-82-10213
公开号:KR101546374B1
公开(公告)日:2015-08-24
본 발명은 비스무트 촉매를 이용한 안트라센 유도체의 제조방법에 관한 것으로, 비스무트 촉매 및 산 첨가제를 이용하여 간단하고 효율적으로 안트라센 유도체를 제조방법에 관한 것이다. 상기 제조방법은 비스무트 촉매 및 산 첨가제를 사용함에 따라 짧은 시간에 고수율로 목적물질을 얻을 수 있고, 이때 제조된 안트라센 유도체는 의약품 및 농약을 포함하는 정밀화학 중간체 및 광학 성질을 가지는 다양한 고분자 물질의 합성에 이용될 수 있다.
This invention relates to a method for producing anthracene derivatives using bismuth catalysts, wherein the method utilizes bismuth catalysts and acid additives to efficiently produce anthracene derivatives. The production method allows for obtaining the target material at a high yield in a short time by using bismuth catalysts and acid additives. The anthracene derivatives produced by this method can be used in the synthesis of various high molecular substances with precise chemical properties, including pharmaceuticals, pesticides, and optical properties.
Facile Synthesis of Polycyclic Aromatic Hydrocarbons: Brønsted Acid Catalyzed Dehydrative Cycloaromatization of Carbonyl Compounds in 1,1,1,3,3,3-Hexafluoropropan-2-ol
The cycloaromatization of aromatic aldehydes and ketones was readily achieved by using a Bronsted acid catalyst in 1,1,1,3,3,3-hexafluoropropan-2-ol (HFIP). In the presence of a catalytic amount of trifluoromethanesulfonic acid, biaryl-2-ylacetaldehydes and 2-benzylbenzaldehydes underwent sequential intramolecular cationic cyclization and dehydration to afford phenacenes and acenes, respectively. Furthermore
Bismuth-catalyzed synthesis of anthracenes via cycloisomerization of o-alkynyldiarylmethane
作者:Jungmin Park、Hyuck Choi、Deug-Chan Lee、Kooyeon Lee
DOI:10.1016/j.tetlet.2015.10.111
日期:2015.12
In this study, anthracenes were efficiently synthesized from o-alkynyldiarylmethane using a novel method that exploits the synergistic effect between Bi(OTf)3 as the catalyst, and trifluoroacetic acid (TFA). Through this reaction, we achieved the rapid and efficient synthesis of anthracenes bearing various functional groups under mild conditions.
Flexible and Practical Synthesis of Anthracenes through Gold-Catalyzed Cyclization of<i>o</i>-Alkynyldiarylmethanes
作者:Chao Shu、Cheng-Bin Chen、Wei-Xi Chen、Long-Wu Ye
DOI:10.1021/ol402713g
日期:2013.11
A concise gold-catalyzed method for the preparation of anthracenes from o-alkynyldiarylmethanes has been developed. Under mild reaction conditions, versatile anthracene derivatives were formed in moderate to good yields. The high flexibility, broad substrate scope, and mild nature of this reaction render it a viable alternative for the synthesis of anthracenes.