Direct access to 1,4-disubstituted 1,2,3-triazoles through organocatalytic 1,3-dipolar cycloaddition reaction of α,β-unsaturated esters with azides
作者:Wenjun Li、Xiao Zhou、Yepeng Luan、Jian Wang
DOI:10.1039/c5ra19038j
日期:——
DBU-catalyzed organocatalytic 1,3-dipolarcycloadditionreactions of α,β-unsaturated esters with azides have been developed. This strategy generates 1,4-disubstituted 1,2,3-triazoles in high yields with high regioselectivities. It is demonstrated that some of these products can be transformed into important pharmaceutical agents.
Kinetics and mechanism of the 1,3-dipolar cycloaddition of phenyl azides to methyl 3-pyrrolidinoacrylate
作者:Basil H. Al-Sader、Mohamed Kadri
DOI:10.1016/s0040-4039(00)98779-3
日期:1985.1
Kinetics of cycloadditions of phenyl azides to methyl 3-pyrrolidinoacrylate (2) produced Hammett ϱ = 2.2. An Ea of 13.5 kcal mole −1 and Δ S* of −37.4 cal.K−l mole−1 were calculated for the cycloaddition of p-O2NC6H4N3 to 2. The cycloadditions are concerted, non-synchronous, and are controlled by LUMO (azide) - HOMO (dipolarophile) interactions.
苯叠氮化物与3-吡咯烷基丙烯酸甲酯(2)的环加成反应动力学为Hammett ϱ = 2.2。计算出pO 2 NC 6 H 4 N 3至2的环加成反应的E a为13.5 kcal摩尔-1,ΔS *为-37.4 cal.K -1摩尔-1。并受LUMO(叠氮化物)-HOMO(双极亲和性)相互作用的控制。
LYSOPHOSPHATIDIC ACID RECEPTOR ANTAGONISTS
申请人:Buckman Brad O.
公开号:US20130072449A1
公开(公告)日:2013-03-21
Compounds, methods of making such compounds, pharmaceutical compositions and medicaments comprising such compounds, and methods of using such compounds to treat, prevent or diagnose diseases, disorders, or conditions associated with one or more of the lysophosphatidic acid receptors are provided.