24102-01-0Relevant articles and documents
EtAlCl2/2,6-Disubstituted Pyridine-Mediated Carboxylation of Alkenes with Carbon Dioxide
Tanaka, Shinya,Watanabe, Kota,Tanaka, Yuuki,Hattori, Tetsutaro
supporting information, p. 2576 - 2579 (2016/06/15)
α-Arylalkenes and trialkyl-substituted alkenes undergo carboxylation with CO2 in the presence of EtAlCl2 and 2,6-dibromopyridine to afford the corresponding α,β- and/or β,γ-unsaturated carboxylic acids. This reaction is suggested to proceed via the electrophilic substitution of EtAlCl2 with the aid of the base, followed by the carbonation of the resulting ate complex. This reaction can be applied to terminal dialkylalkenes by using a mixture of 2,6-di-tert-butylpyridine and 2,6-dibromopyridine.
Catalytic photocarboxylation of 1,1-diphenylethylene with N,N,N′,N′-tetramethylbenzidine and carbon dioxide
Ito, Yoshikatsu
, p. 3108 - 3114 (2007/10/03)
Photocarboxylation of 1,1-diphenylethylene with N,N,N′,N′-tetramethylbenzidine (TMB) in MeCN under bubbling of CO2 proceeded with high catalytic efficiency, giving 3,3-diphenylacrylic acid (DPA) and 3-hydroxy-3,3-diphenylpropionic acid (20). The turnover number (TON=(DPA+20)/TMB) reached 17. Similarly, 1-phenyl-1-cyclohexene yielded cis-2-acetamido-2-phenylcyclohexanecarboxylic acid with TON 5.9. As compared with related N,N-dimethylaniline derivatives, TMB is more resistant to photodecomposition, has the much larger absorbance in the S0→S1 transition, and has the lower quenching efficiency by CO2. Probably these factors are partly responsible for the high TON observed for TMB.
Design, Pharmacokinetic, and Pharmacodynamic Evaluation of a New Class of Soft Anticholinergics
Huang, Fenglei,Browne, Clinton E.,Wu, Whei-Mei,Juhasz, Attila,Ji, Fubao,Bodor, Nicholas
, p. 1681 - 1689 (2007/10/03)
Purpose. To design and evaluate a new class of soft anticholinergics with subtype selectivity. Methods. A new class of soft anticholinergics was designed based on the "inactive metabolite" approach. Four compounds were synthesized. The potency and soft na