Results 11 to 20 of about 12,662 (287)

Synthesis of 2-amino-4H-pyran and 2-benzylidene malononitrile derivatives using a basil seed as a cheap, natural, and biodegradable catalyst

Current Research in Green and Sustainable Chemistry, 2022
Developing green and sustainable principles in catalytic systems using natural materials is becoming a suitable strategy to reduce the possible pollutant with high-risk agents.
Eskandar Kolvari, Nadiya Koukabi, Zohreh Ozmaei, Hadise Khoshkho, Farzad Seidi   +4 more
doaj   +1 more source

EFFECT OF PYROLYSIS HEATING RATE ON THE CHEMICAL COMPOSITION OF WOOD VINEGAR FROM EUCALYPTUS UROGRANDIS AND MIMOSA TENUIFLORA [PDF]

Revista Árvore, 2020
Among the parameters used in the biomass carbonization process, the heating rate is one of the most important. The objective of the present work was to assess the influence of different heating rates on the chemical composition of wood vinegar (WV) from ...
Lúcio César Dantas de Medeiros, Alexandre Santos Pimenta, Renata Martins Braga, Tatiane Kelly de Azevedo Carnaval, Pedro Nico Medeiros Neto, Dulce Maria de Araújo Melo   +5 more
doaj   +1 more source

Iodine-Catalyzed Prins Cyclization of Homoallylic Alcohols and Aldehydes

Molecules, 2013
The iodine-catalyzed Prins cyclization of homoallylic alcohols and aldehydes was investigated under metal-free conditions and without additives. Anhydrous conditions and inert atmosphere are not required.
Luiz F. Silva, Erick L. Bastos, Antônio C. Doriguetto, Kachi R. Kishore Kumar Reddy, Iara M. L. Rosa   +4 more
doaj   +1 more source

Six-membered ring systems: with O and/or S atoms [PDF]

, 2013
A large variety of publications have emerged in 2012 involving O- and S-6- membered ring systems. The increasing number of reviews and other communica- tions dedicated to natural and synthetic derivatives and their biological significance highlights ...
Abe, Abreu, Ackermann, Adcock, Albrecht, Albrecht, Allen, Anantachoke, Anxionnat, Arcadi, Archambeau, Athe, Augustine, Azevedo, Azzam, Barancelli, Barbier, Beaulieu, Beemelmanns, Bharate, Bhattacharyya, Bondalapati, Borkar, Brawn, Brimble, Bunt, Byers, Cai, Cai, Cannon, Cao, Celindro, Chaładaj, Chemler, Chen, Chen, Chen, Chen, Chianese, Chinnagolla, Choi, Chuang, Clarisse, Cook, Cui, Cui, Cui, Das, Dentel, Desimoni, Dias, Dobish, Dong, Donner, dos Santos, Du, Elinson, Enders, Enders, Essig, Fan, Fei, Ferguson, Fernandes, Finefield, Fromentin, Fujioka, Fujita, Fujiwara, Fuwa, Gao, Gao, Gao, Ge, Ghassamipour, Ghebreghiorgis, Ghorai, Ghosh, Ghosh, Ghosh, Ghosh, Giun, Gliszczynska, Goel, Grandane, Gregg, Grove, Gunduz, Guo, Hamilton, Han, Handa, Hintermann, Ho, Hong, Hong, Hornillos, Hossaini, Hou, Hu, Hu, Hu, Hu, Huang, Hung, Huple, Hussain, Iaroshenko, Indukuri, Jacobsen, Jacolot, Jepsen, Jiang, Jung, Kalaitzakis, Kamalraja, Kamat, Karami, Karmakar, Kaur, Kavala, Kazemi, Khaligh, Khan, Khoshkholgh, Khurana, Khurana, Kim, Kim, Kim, Kim, Kitamura, Kobayashi, Kobayashi, Kolla, Komeyama, Kraus, Kraus, Krishna, Kuarm, Kueny-Stotz, Kumar, Kumar, Kumar, Kumar, Kuntiyong, Lee, Levchenko, Li, Li, Li, Li, Li, Li, Li, Lian, Little, Liu, Liu, Liu, Liu, Liu, Liu, Liu, Lu, Lu, Lv, Madabhushi, Mahendar, Maiti, Majetich, Majetich, Majumdar, Majumdar, Majumdar, Majumdar, Mallik, Masters, Miege, Miller, Minami, Miyaoka, Mo, Mo, Mohapatra, Mondal, Mosey, Motamedi, Motti, Mulakayala, Mull, Murai, Nagarapu, Nagasawa, Nair, Nandaluru, Nemati, Nemecek, Nibbs, Nichols, Nishina, Nising, Noda, Olomola, Osyanin, Osyanin, Palanichamy, Pan, Pandit, Parida, Parmar, Parrish, Parthasarathy, Parvatkar, Patil, Pavan, Peh, Pei, Pei, Pei, Pei, Pesyan, Petrone, Pilkington, Pillay, Pina, Pinto, Pisani, Prust, Rad-Moghadam, Raghavan, Rama, Ramachary, Ramachary, Ramachary, Ramesh, Rasolofonjatovo, Raubenheimer, Reddy, Reddy, Reddy, Reddy, Reddy, Reddy, Revanna, Romanov-Michailidis, Roscales, Rubush, Rueping, Rueping, Rueping, Safari, Saha, Saha, Sajna, Samai, Sashidhara, Sashidhara, Sashidhara, Schmidt, Schmidt, Scott, Shaikh, Sharma, Sharma, Sharma, Shekhar, Shekhar, Shen, Shi, Shyshkina, Singh, Singh, Singh, Soeta, Soleimani, Song, Song, Srinivas, Srinivas, Stadlbauer, Sudheedran, Sun, Sun, Sun, Suresh, Szostak, Takaki, Takii, Talavera, Tanaka, Tang, Terada, Thirunavukkarasu, Tieze, Tieze, Tisseh, Tisseh, Tokunou, Tomas, Tomas, Tyrrell, Uyanik, Vadola, VanVeller, Vaz, Verma, Verma, Vidyasagar, Vu, Vyas, Wang, Wang, Wang, Wang, Wang, Wang, Wang, Wang, Wang, Wang, Ward, Wei, Willis, Wilson, Wu, Wu, Xie, Xie, Xu, Yadav, Yadav, Yadav, Yadlapalli, Yamuna, Yang, Yang, Yang, Yang, Yang, Yang, Yao, Yin, Yoshida, Yu, Zak, Zhang, Zhang, Zhang, Zhang, Zhang, Zhao, Zhao, Zhao, Zheng, Zhou, Zhu, Zhu, Zurwerra, Zíñiga, Žádný   +360 more
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Gold(I)-catalysed one-pot synthesis of chromans using allylic alcohols and phenols [PDF]

, 2013
A gold(I)-catalysed reaction of allylic alcohols and phenols produces chromans regioselectively via a one-pot Friedel–Crafts allylation/intramolecular hydroalkoxylation sequence.
Barker, Graeme, Coutant, Eloi, Lee, Ai-Lan, Young, Paul C   +3 more
core   +5 more sources

Synthesis of novel tetrahydroquinoline derivatives from α,α′-bis(substituted-benzylidene)cycloalkanones

Journal of Saudi Chemical Society, 2016
In this paper, we describe a two-step synthesis of a series of substituted tetrahydroquinoline analogies. In the first step α,α′-bis(substituted-benzylidene)cycloalkanones are reacted with malononitrile to afford 2-amino-3-cyano-4H-pyrans.
Enayatollah Sheikhhosseini, Elinaz Farrokhi, Mohammad Ali Bigdeli   +2 more
doaj   +1 more source

The synthesis of 4H-pyran containing hemispherands via pyrylium salts [PDF]

, 1986
Two new hemispherands 2a and 2b containing a central 4H-pyran unit were synthesized via appropiately substituted 2,6-phenyl pyrylium salts; largest ΔGo values of complexation of 2a and 2b with different alkali picrates are found for Na+ and K+
Dijkstra, P.J., Hams, B.H.M., Hertog, H.J. den, Reinhoudt, D.N., Steen, B.J. van   +4 more
core   +2 more sources

Extending Human Perception of Electromagnetic Radiation to the UV Region through Biologically Inspired Photochromic Fuzzy Logic (BIPFUL) Systems. [PDF]

, 2015
Photochromic Fuzzy Logic Systems have been designed that extend human visual perception into the UV region. The systems are founded on a detailed knowledge of the activation wavelengths and quantum yields of a series of thermally reversible photochromic ...
Albus, Albus, Amanda L. Rightler, B. Mark Heron, Brou, Christopher D. Gabbutt, Conway, Delbaere, di Nunzio, Gegenfurtner, Gentili, Gentili, Gentili, Gentili, Gentili, Gust, Hepworth, Hunt, Lennie, Li, Ling, Lokshin, Ludlow, Maafi, Marshall, Monroy, Pier Luigi Gentili, Solomon, Sung, Szaciłowski, Tovée, Wu, Zadeh, Zadeh, Zeki, Zeki   +35 more
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Populene D Analogues: Design, Concise Synthesis and Antiproliferative Activity

Molecules, 2012
An efficient and concise synthesis of nine populene D analogues was performed using an iodine-catalyzed Prins cyclization as the key transformation.
Kachi R. Kishore Kumar Reddy, Giovanna B. Longato, João E. de Carvalho, Ana L. T. G. Ruiz, Luiz F. Silva, Jr.   +4 more
doaj   +1 more source

Domino reaction of 3-nitro-2-(trifluoromethyl)-2H-chromenes with 2-(1-phenylalkylidene)malononitriles: Synthesis of functionalized 6-(trifluoromethyl)-6H-dibenzo[b,d]pyrans and a rare case of [1,5] sigmatropic shift of the nitro group [PDF]

, 2013
A variety of functionalized 6-(trifluoromethyl)-6H-dibenzo[b,d]pyrans were easily synthesized in good yields under mild conditions by a domino reaction of 3-nitro-2-(trifluoromethyl)-2H-chromenes with 2-(1-phenylethylidene)- and 2-(1-phenylpropylidene ...
Barkov, A. Y., Korotaev, V. Y., Sosnovskikh, V. Y.   +2 more
core   +1 more source