Syntheses of Benzilic Acids through Electrochemical Reductive Carboxylation of Benzophenones in the Presence of Carbon Dioxide
作者:Yoshikazu Ikeda、Eiichiro Manda
DOI:10.1246/bcsj.58.1723
日期:1985.6
Reaction conditions for the electrochemical synthesis of benzilic acid (2a) under the atmosphere of carbon dioxide was investigated from the preparative points of view. The highest yield of 2a (86%) was obtained under the following conditions; cathode: mercury, electricity passed: 2.3 F/mol, constant current density: 2.5 mA/cm2, benzophenone (1a) (8.2×10−3mol), electrolyte(KI, 1.7×10−2mol) in DMF (50
Synthesis of α-Hydroxycarboxylic Acids from Various Aldehydes and Ketones by
Direct Electrocarboxylation: A Facile, Efficient and Atom Economy Protocol
In present work, the formation of α-hydroxycarboxylic acids have been described from various aromatic aldehydes and ketones via direct electrocarboxylation method with 80-92% of yield without any side product and can be purified by simple recrystallization using sacrificial Mg anode and Pt cathode in an undivided cell, CO2 at (1 atm) was continuously bubbled in the cell throughout the reaction using
Studien über Konstitution und Wirkung von relativ apolaren, lipoidaffinen Kontaktinsektiziden. 4. Mitteilung. Ester von substituierten Diphenyl-essig- und -propionsäuren. pK-Werte
作者:W. Voegtli、Paul Läuger
DOI:10.1002/hlca.19550380108
日期:——
Von jeweils vergleichbaren Serien von p, p′-substituierten Diphenyl-essigsäuren, α,α-Diphenyl- und β,β-Diphenyl-propionsäuren, Diphenylglykol- und β-Oxy-β,β-diphenylpropionsäuren, sowie Diphenyl-acrylsäuren wurden die pK-Werte bestimmt.
确定pK值。
Anticholinergics, processes for preparing them, and pharmaceutical compositions containing them
申请人:——
公开号:US20020119991A1
公开(公告)日:2002-08-29
A compound of formula 1
1
wherein:
A is a group selected from
2
X
−
is an anion with a single negative charge;
R
1
and R
2
are each independently a C
1
-C
4
-alkyl optionally substituted with hydroxy or halogen; and
R
3
, R
4
, R
5
, R
6
, R
7
, and R
8
are each independently hydrogen, C
1
-C
4
-alkyl, C
1
-C
4
-alkyloxy, hydroxy, CF
3
, CN, NO
2
, or halogen,
with the proviso that at least one of the groups R
3
, R
4
, R
5
, R
6
, R
7
, and R
8
is not hydrogen, processes for preparing these compounds, pharmaceutical compositions containing these compounds, and their use as pharmaceutical compositions.
Anticholinergics, processes for preparing them and pharmaceutical composition containing them
申请人:Meissner Helmut
公开号:US20050054664A1
公开(公告)日:2005-03-10
A compound of formula 1
wherein:
A is a group selected from
X
−
is an anion with a single negative charge;
R
1
and R
2
are each independently a C
1
-C
4
-alkyl optionally substituted with hydroxy or halogen; and
R
3
, R
4
, R
5
, R
6
, R
7
, and R
8
are each independently hydrogen, C
1
-C
4
-alkyl, C
1
-C
4
-alkyloxy, hydroxy, CF
3
, CN, NO
2
, or halogen,
with the proviso that at least one of the groups R
3
, R
4
, R
5
, R
6
, R
7
, and R
8
is not hydrogen, processes for preparing these compounds, pharmaceutical compositions containing these compounds, and their use as pharmaceutical compositions.