“One-Pot” Tandem C−H Borylation/1,4-Conjugate Addition/Reduction Sequence
摘要:
A microwave-assisted, one-pot, iridium-catalyzed aromatic C-H borylation/rhodium-catalyzed 1,4-conjugate addition sequence provides a highly robust protocol suitable for high-throughput array synthesis. Selective formation of either beta-aryl-substituted ketones or the corresponding alcohols can be achieved in good overall yields by simple variation of the reaction conditions.
CETP INHIBITORS DERIVED FROM BENZOXAZOLE ARYLAMIDES
申请人:HUNT Julianne A.
公开号:US20100298288A1
公开(公告)日:2010-11-25
Compounds having the structure of Formula I1 including pharmaceutically acceptable salts of the compounds, are potent CETP (cholesterol ester transfer protein) inhibitors, and are useful for raising HDL-cholesterol, reducing LDL-cholesterol, and for treating or preventing atherosclerosis Atherosclerosis and its clinical consequences, coronary heart disease (CHD), stroke and penpheral vascular disease, represent a truly enormous burden to the health care systems of the industrialized world In formula I, A-B is an arylamide moiety
Reductive α-alkylation of ketones with aldehydes at atmospheric pressure of carbon monoxide: the effect of fluoride activation in ruthenium catalysis
作者:Sofiya A. Runikhina、Alexey A. Tsygankov、Oleg I. Afanasyev、Denis Chusov
DOI:10.1016/j.mencom.2023.01.005
日期:2023.1
Fluoride additive to [(p-cymene)RuCl2]2, a readily available ruthenium catalyst, allows one to achieve milder conditions for the reductive alkylation of aldehydes with ketones using carbonmonoxide as a reducing agent. The procedure is suitable for the broad substrate scope, and a probable explanation for the fluoride role was provided.
Thiourea/Proline Derivative-Catalyzed Synthesis of Tetrahydrofuran Derivatives: A Mechanistic View
作者:Suzanne M. Opalka、Jeremy L. Steinbacher、Brandon A. Lambiris、D. Tyler McQuade
DOI:10.1021/jo200838v
日期:2011.8.19
A thiourea/proline derivative-catalyzed synthesis of linear a-substituted tetrahydrofuran/pyran derivatives starting with lactol substrates is presented. This study demonstrates the utility and potential complications of using (thio)urea/proline cocatalysis as each of these catalysts is necessary to provide the observed reactivity, but a time-dependent decrease in enantioselectivity is observed. New mechanistic insights into (thio)urea/proline cocatalysis are presented.