17572-39-3Relevant articles and documents
A detailed investigation into the one-pot cascade reaction of ethyl 3,9-dimethyl-7-phenyl-6H-dibenzo-[b,d]pyran-6-one-8-carboxylate with phenylhydrazine
Chen, Chao-Yue,Qiao, Yu,Zhang, Lei,Wang, Xin,Yang, Ting-Hai
, p. 4079 - 4089 (2020)
Abstract: When synthesizing cyclohexane-annulated pyrazolones from a cyclohexonedicarboxylate derivative with phenylhydrazine under the catalysis of sulfuric acid in the air, up to five products were finally obtained from the one-pot procedure. Among the
Synthesis of highly functionalized 3,4-cyclohexane-annelated coumarins
Chen, Chao-Yue,Zhang, Xiao-Mei,Shi, Jian-Jun,He, Jie
, p. 583 - 593 (2015/03/04)
Efficient synthetic access to highly functionalized 3,4-cyclohexane-annelated coumarins has been achieved by combining two methods. First, the important intermediates multisubstituted cyclic ?2-keto esters were prepared conveniently by condensing a variet
An efficient regioselective synthesis of functionalized biphenyls via sequential reactions of aromatic aldehydes and β-keto esters or ketones
Sharma, Anindra,Pandey, Jyoti,Tripathi
scheme or table, p. 1812 - 1816 (2009/07/19)
Knoevenagel/Michael/Aldol reactions of aromatic aldehydes and β-keto esters/ketones in a sequential manner yielded intermediate cyclohexanones in good yields. The latter, on oxidative aromatization with iodine, afforded functionalized biphenyls with at le
A facile synthesis of 4-aryl-5-alkoxycarbonyl-6-hydroxy-6-methyl-4,5,6,7-tetrahydro-3-hydroxy-2-(pyridin-2-yl)-indazoles and their nmr characterizations
Amirthaganesan, Shanmugasundaram,Aridoss, Gopalakrishnan,Park, Young Hwan,Kim, Jong Su,Son, Se Mo,Jeong, Yeon Tae
, p. 537 - 554 (2008/09/20)
A series of N-pyridinyl tetrahydroindazoles have been synthesized by a convenient and regioseletive method by taking cyclic 2-ketoesters as scaffolds. An optimum reaction condition was achieved by monitoring the reaction in different reaction c
Microwave assisted rapid and efficient synthesis of 2,1-benzoisoxazoles
Rajanarendar,Rao, E. Kalyan,Karunakar
, p. 805 - 807 (2007/10/03)
A simple extremely fast and high yielding protocol has been developed for the synthesis of 2,1-benzisoxazoles under microwave irradiation.
Research on heterocyclic compounds. XLIII. Synthetic studies on 1,4-dihydropyridine derivatives
Rimoli, Maria Grazia,Avallone, Lucia,Zanarone, Serena,Abignente, Enrico,Mangoni, Alfonso
, p. 1117 - 1122 (2007/10/03)
In order to obtain N-benzyl-3,5-dicarbethoxy-2,6-dimethyl-4-phenyl-1,4-dihydropyridine 1 as a lead compound of pharmacological interest, the classical Hantzsch synthetic method and the modified Collie procedure were used. However, only a very low yield of
A synthetic entry into fused pyran derivatives through carbon transfer reactions of 1,3-oxazinanes and oxazolidines with carbon nucleophiles
Singh, Kamaljit,Singh, Jasbir,Singh, Harjit
, p. 14273 - 14280 (2007/10/03)
Acid catalysed condensations of various 2 substituted 1,3-oxazinanes 3 and 1,3-oxazolidines 4 with cyclic carbon nucleophiles viz. 5,5-dimethyl-1,3-cyclohexanedione and 1,3-cyclohexanedione furnish xanthene derivatives, whereas a Knoevenagel reaction proceeds with acyclic nucleophiles. In case of 4b and 4c, a unique synthesis of functionalised α-tetralones has emerged. Reactions of mixtures of cyclic and acyclic carbon nucleophiles with 3 provide some functionalised and partially reduced benzopyran derivatives.
1-ARYL- AND 1-BENZYL-3,5-DIETHOXYCARBONYL-1,4-DIHYDROPYRIDINES
Sausin, A.E.,Chekavichus, B.S.,Lusis, V.K.,Dubur, G.Ya.
, p. 377 - 385 (2007/10/02)
The possibility has been studied of using anilines in the Hantzsch synthesis.It has been shown that, with the exception of those containing strong electron-accepting substituents, they take part in this reaction with the formation of 1-aryl-1,4-dihydropyridines.The reaction largely depends on the nature of the substituents in the aniline and in the benzaldehyde and is promoted by electron-accepting substituents in the aldehyde and electron-donating substituents in the amine.The mechanism of the reaction is discussed.A number of 1-benzyl-1,4-dihydroxypyridines have been synthesized.The UV, IR, and PMR spectra and the electro-oxidation of the compounds obtained have been studied.