1539-44-2Relevant academic research and scientific papers
Aromatization of Hantzsch 1,4-dihydropyridines with I2-MeOH
Yadav,Subba Reddy,Sabitha,Kiran Kumar Reddy
, p. 1532 - 1534 (2000)
4-Alkyl or aryl substituted Hantzsch 1,4-dihydropyridines are aromatized to the corresponding pyridines in high yields by iodine in refluxing methanol. The method tolerates several substituents such as alkyl, benzyl, aryl and heterocyclic groups present i
Novel photoinduced aromatization of Hantzsch 1,4-dihydropyridines
Jin, Mei-Zhong,Yang, Li,Wu, Long-Min,Liu, You-Cheng,Liu, Zhong-Li
, p. 2451 - 2452 (1998)
4-Alkyl- and/or aryl-1,4-dihydro-2,6-dimethylpyridine-3,5-dicarboxylates (Hantzsch 1,4-dihydropyridines) are quantitatively oxidized to the corresponding pyridine derivatives by irradiation in CCl4 via a photoinduced electron transfer mechanism
Aluminum Chloride Promoted Hantzsch Reaction of N -Tosylhydrazones
Wang, Hu,Tang, Meng
, p. 4893 - 4898 (2017)
An aluminum chloride promoted Hantzsch reaction of N -tosylhydrazones has been developed. The reaction is general for a wide range of N -tosylhydrazones, and a series of 1,4-dihydropyridines (1,4-DHPs) were prepared in moderate to excellent yields.
Silica gel-supported bis(trimethylsilyl) chromate: Oxidation of 1,4-dihydropyridines to pyridines
Heravi, Majid M.,Derikvand, Fatemeh,Oskooie, Hossein A.,Shoar, Rahim Hekmat
, p. 77 - 82 (2006)
An efficient and convenient method for the oxidation of 1,4-dihydropyridines mediated by silica gel-supported bis(trimethylsilyl) chromate in refluxing CH2Cl2 is reported. Copyright Taylor & Francis LLC.
Activated carbon-promoted oxidative aromatization of hantzsch 1,4-dihydropyridines and 1,3,5-trisubstituted pyrazolines using molecular oxygen
Nakamichi, Natsuki,Kawashita, Yuka,Hayashi, Masahiko
, p. 1015 - 1020 (2004)
In the presence of activated carbon, Hantzsch 1,4-dihydropyridines and 1,3,5-trisubstituted pyrazolines were aromatized with molecular oxygen to the corresponding pyridines and pyrazoles in excellent yields.
Manganese dioxide supported onto HZSM-5 zeolite, a versatile reagent for the aromatization of Hantzsch 1,4-dihydropyridines
Heravi, Majid M.,Moosavi, Fahime Sadat Sh.,Beheshtiha, Yahya Sh.,Ghassemzadeh, Mitra
, p. 415 - 418 (2004)
A general and practical route for the fast and high yield aromatization of 1,4-dihydropyridine using a relatively benign oxidant, manganese dioxide under classical heating and microwave irradiation is described.
N,N′-ethylene-bis(benzoylacetoniminato) copper (II), Cu(C 22H22N2O2), a new reagent for aromatization of Hantzsch 1,4-dihydropyridines
Dehghanpour, Saeed,Heravi, Majid M.,Derikvand, Fatemeh
, p. 433 - 438 (2007)
A variety of Hantzsch 1,4-dihydropyridines were oxidized to their corresponding pyridines in high yields in the presence of Cu(C 22H22N2O2) in refluxing acetic acid.
KHSO4 supported onto bentonite, a versatile reagent for aromatization of Hantzsch 1,4-dihydropyridines
Heravi, Majid M.,Bakhtiari, Khadijeh,Oskooie, Hossein A.
, p. 579 - 581 (2007)
Aromatization of Hantzsch 1,4-dihydropyridines was promoted by KHSO 4, a relatively green chemical, supported onto bentonite to yield the corresponding pyridine derivatives in excellent yields. The reaction was carried out under mild and conven
Aromatization of Hantzsch 1,4-dihydropyridines and 1,3,5-trisubstituted pyrazolines with HIO3 and I2O5 in water
Chai, Lingzhi,Zhao, Yankai,Sheng, Qiuju,Liu, Zhong-Quan
, p. 9283 - 9285 (2006)
Hantzsch 1,4-dihydropyridines and 1,3,5-trisubstituted pyrazolines were converted to the corresponding pyridines and pyrazoles efficiently by the treatment of a catalytic amount of HIO3 or I2O5 in water.
Catalytic oxidation of 1,4-dihydropyridins by tetrabutylammonium periodate in the presence of manganese amino acid Schiff base
Karimipour, Gholam Reza,Nasr-Esfahani, Masoud,Valipour, Ghasem
, p. 415 - 417 (2007)
The amino acid Schiff base manganese complex (Tryp-Mn); 1, was prepared with L-tryptophan, salicylaldehyde and Mn(OAc)2.4H2O in methanol. In the presence of 1, 1,4-dihydropyridines (1,4-DHPs) were oxidised by n-Bu4NIO
