Russell-Jones theory for the dissociative volatilization process and a standard approach based on the Arrhenius model. The values of the parameters characterizing the thermal properties of alkanaminium hexachlorostannates, i.e. temperatures of the thermal effects, and the thermochemical and kinetic constants of thermolysis, depend on the number, length and structure of the alkyl substituent. The essential
摘要 热分析方法(DTA、TG 和 DTG)用于研究具有通式 [(CnH2n+1)pNH4-p]2SnCl6(其中 n = 1–4 和 p = 2–4)的无支链复合盐的热行为和其他几种环状和开链支链脂肪族链烷胺六氯锡酸盐。这些化合物的热解离通常可以使用等式来概括,其中 A 表示烷基(a = 0 和 s = 1 表示季铵盐,a = 1 和 s = 0 表示其他研究的化合物)。具有简单结构的衍生物的热解发生在一个步骤中并导致它们的完全挥发。其他化合物的分解,通常具有复杂的结构,伴随着副反应。实验 TG 曲线用于检查热解的热力学和动力学。热解离焓基于范特霍夫方程进行评估。导出的值与可用的文献数据一起用于确定盐的形成焓和晶格能。后者的数量也使用 Kapustinskii-Yatsimirskii 公式进行了检查。使用Jacobs 和Russell-Jones 解离挥发过程理论和基于Arrhenius
Method for producing carbonyl diimidazoles
申请人:BASF Aktiengesellschaft
公开号:US06353115B1
公开(公告)日:2002-03-05
In a process for preparing carbonyldiimidazole of the general formulae Ia, Ib, Ic or mixtures thereof
where R1 is hydrogen or a C1-4-alkyl radical and R2 is hydrogen or a methyl radical, by reacting at least one imidazole of the general formulae IIa and IIb
in which R1 and R2 have the abovementioned meaning, with phosgene in an inert solvent, stoichiometric amounts, based on the imidazoles, of an organic nitrogen base which has a lower pKb than imidazole are added to the reaction mixture.
Overcoming solid handling issues in continuous flow substitution reactions through ionic liquid formation
作者:Saeed K. Kashani、Ryan J. Sullivan、Mads Andersen、Stephen G. Newman
DOI:10.1039/c8gc00618k
日期:——
the use of acid scavenging organic bases that generate low- to moderate-melting ionicliquids upon protonation. The application of these bases towards the most commonly run substitutions are demonstrated, enabling reactions to be run in flow without requiring additional equipment, specific solvents, or dilute reaction conditions to prevent clogging.
Pyrrolidine modulators of CCR5 chemokine receptor activity
申请人:——
公开号:US20020094989A1
公开(公告)日:2002-07-18
Pyrrolidine compounds of Formula I:
1
(wherein
1
, R
2
, R
3
, R
4
, R
5
,R
6a
, R
6b
, R
7
and R
8
are defined herein) are described. The compounds are modulators of CCR5 chemokine receptor activity. The compounds are useful, for example, in the prevention or treatment of infection by HIV and the treatment of AIDS, as compounds or pharmaceutically acceptable salts, or as ingredients in pharmaceutical compositions, optionally in combination with other antivirals, immunomodulators, antibiotics or vaccines. Methods of treating AIDS and methods of preventing or treating infection by HIV are also described.
Ruthenium-catalyzed formal alkyl group transfer: Synthesis of quinolines from nitroarenes and alkylammonium halides
作者:Chan Sik Cho、Na Young Lee、Tae-Jeong Kim、Sang Chul Shim
DOI:10.1002/jhet.5570410320
日期:2004.5
Nitroarenes are reductively cyclized with an array of tetraalkylammonium halides and trialkylarnmonium chlorides in the presence of a catalytic amount of a ruthenium catalyst along with tin(II) chloride dihydrate at 180° to afford the corresponding quinolines in moderate to good yields. The addition of tin(II) chloride dihydrate is necessary for the effective formation of quinolines and toluene is