Mahapatra, Bepin B.; Mahapatra, S. M.; Pujari, S. K., Journal of the Indian Chemical Society, 1982, vol. 59, # 8, p. 988 - 989
作者:Mahapatra, Bepin B.、Mahapatra, S. M.、Pujari, S. K.、Chiranjeevi, A.
DOI:——
日期:——
Benzoin Schiff Bases: Design, Synthesis, and Biological Evaluation as Potential Antitumor Agents
作者:Dima A. Sabbah、Fatima Al-Tarawneh、Wamidh H. Talib、Kamal Sweidan、Sanaa K. Bardaweel、Eveen Al-Shalabi、Haizhen A. Zhong、Ghassan Abu Sheikha、Reema Abu Khalaf、Mohammad S. Mubarak
DOI:10.2174/1573406414666180412160142
日期:2018.10.3
for anticancerdrug design. Objectives: Target compounds were designed to probe the significance of alcohol and imine moieties tailored on a benzoin scaffold to better understand the structure activity relation (SAR) and improve their biological activity as anticancer compounds. Methods: Chemical synthesis of the targeted compounds, biological evaluation tests against human colonadenocarcinoma (HCT-116)
作者:Hartmut B. Stegmann、Frank‐Martin Schaber、Paul Schuler、Klaus Scheffler
DOI:10.1002/mrc.1260270912
日期:1989.9
Racemic and achiral alkyl aryl nitroxides were examined at various temperatures. The restricted rotation of the aminoxyl substituents was indicated both by the β-proton coupling constants and by the inequivalence of the aromatic ortho protons. These results are interpreted by the presence of two different rotamers which may lead to two splitting constants for the β-proton. The capability for inter- and intra-molecular hydrogen bond formation in the nitroxides investigated was demonstrated. However, complexes consisting of chiral radicals and chiral auxiliaries do not show hyperfine structures which unambiguously indicate diastereomeric species. Therefore, hydrogen bonding between chiral molecules is not sufficient for chiral recognition if an alteration of the hyperconjugation angle does not occur. Simple steric interactions can result in the doubling of the β-proton coupling constant, independently of diastereomeric complex formation.