Experimental and theoretical structural study of 2-pyridyl- and 4-hydroxyphenyl-1,4-dihydropyridine derivatives
作者:Héctor Novoa De Armas、Norbert Blaton、Oswald M. Peeters、Camiel De Ranter、Margarita Suárez、Emilio Rolando、Yamila Verdecia、Estael Ochoa、Nazario Martín、Margarita Quinteiro、Carlos Seoane、José L. Soto
DOI:10.1002/jhet.5570370627
日期:2000.11
symmetrical 1,4-DHP. The structures of these compounds have been thoroughly studied by X-ray crystallographic analysis and semiempirical (AMI) calculations. A good agreement is found between the theoretical and experimental results. In all cases, the most stable conformation fulfils all the requirements needed for exhibiting an antagonist calcium effect.
Synthesis and Photochemistry of Novel 3,5-Diacetyl-1,4-dihydropyridines
作者:Hamid R. Memarian、Majid M. Sadeghi、Ahmad R. Momeni、Dietrich Döpp
DOI:10.1007/s007060200038
日期:2002.5.1
Some novel 3,5-diacetyl-1,4-dihydropyridine derivatives were synthesized; their photochemical behaviour was studied under oxygen or argon atmosphere. Irradiation of these compounds resulted in the aromatization of the ring and formation of 3,5-diacetylpyridine derivatives. The presence of oxygen plays an important role in the type, rate, or failure of oxidation. Irradiation of these compounds with
SAFAK, C.;SAHIN, I.;SUNAL, R., ARZNEIM.-FORSCH., 40,(1990) N, C. 119-122
作者:SAFAK, C.、SAHIN, I.、SUNAL, R.
DOI:——
日期:——
Assessment and use of two silicon carbide multi-well plates for library synthesis and proteolytic digests using microwave heating
作者:Lauren M. Stencel、Chad M. Kormos、Keri B. Avery、Nicholas E. Leadbeater
DOI:10.1039/b902112d
日期:——
The use of two silicon carbide plates is reported for the preparation of three libraries of organic molecules using microwave heating. In addition, a preliminary study has been carried out, showing that one of the plates can also be used in a proteomics setting. Both the 24-position and 48-position plates heated evenly when irradiated with microwave energy. The 48-position plate was used to prepare a library of N-aryl functionalized β-amino esters via an aza-Michael reaction between anilines and Michael acceptors. The 24-position plate was used to prepare a library of biaryls via a Suzuki coupling methodology and a library of 1,4-dihydropyridines via a Hantzsch synthesis. The 48-position plate was also used to perform the proteolytic digestion of insulin chain B by trypsin.