Role of polar solvents for the synthesis of pillar[6]arenes
作者:S. Santra、I. S. Kovalev、D. S. Kopchuk、G. V. Zyryanov、A. Majee、V. N. Charushin、O. N. Chupakhin
DOI:10.1039/c5ra19569a
日期:——
An efficient procedure for the synthesis of pillar[6]arenes has been developed. The procedure involves the condensation of 1,4-dialkoxybenzenes and paraformaldehyde in the presence of a catalytic amount of H2SO4 or BF3·OEt2 in polar solvent media (acetonitrile, ethyl alcohol, acetone etc.). In all cases the interaction afforded pillar[6]arenes in high yields.
已经开发了合成柱[6]芳烃的有效方法。该方法包括在极性溶剂介质(乙腈,乙醇,丙酮等)中,在催化量的H 2 SO 4或BF 3 ·OEt 2存在下,缩合1,4-二烷氧基苯与低聚甲醛。在所有情况下,相互作用均以高收率提供了支柱[6]芳烃。
RENIN INHIBITORS
申请人:Gwaltney Stephen L.
公开号:US20100137310A1
公开(公告)日:2010-06-03
The invention provides compounds, pharmaceutical compositions, kits, method of preparing, and method of using the compounds which exhibit renin and other S9 proteases activities and consist of the formula:—wherein the variables are as defined herein.
Intramolecular transfer of (Bu3PPd)-Bu-t(0) on a carbon carbon double bond (C=C) was investigated by using Suzuki-Miyaura coupling reaction of dibromostilbenes with aryl boronic acid or boronic acid esters in the presence of various additives containing C=C as a model. Substituent groups at the ortho position of C=C of stilbenes are critical for selective intramolecular catalyst transfer and may serve to suppress formation of the bimolecular C=C-Pd-C=C complex that leads to intermolecular transfer of (Bu3PPd)-Bu-t(0).