Sulfonamide Synthesis through Electrochemical Oxidative Coupling of Amines and Thiols
作者:Gabriele Laudadio、Efstathios Barmpoutsis、Christiane Schotten、Lisa Struik、Sebastian Govaerts、Duncan L. Browne、Timothy Noël
DOI:10.1021/jacs.9b02266
日期:2019.4.10
continuous development of novel and efficient synthetic methods to access these functional groups. Herein, we report an environmentally benign electrochemical method which enables the oxidative coupling between thiols and amines, two readily available and inexpensive commodity chemicals. The transformation is completely driven by electricity, does not require any sacrificial reagent or additional catalysts
A cellulose compound film containing a cellulose compound having two or more substituents whose polarizability anisotropies Δα calculated by mathematical formula (1) are different from each other, wherein substitution degrees of the following substituents A and B in the cellulose compound satisfy relationship as defined by mathematical formula (A1), in which the substituent A has the lowest Δα and the substituent B has the highest Δα:
Δ
α
=
α
x
-
α
y
+
α
z
2
Mathematical
formula
(
1
)
wherein, in characteristic values obtained after diagonalization of polarizability tensor, αx is the largest component, αy is the second largest component, and αz is the smallest component;
DS
B
2+
DS
B
3−
DS
B
6≧−0.1 Mathematical formula (A1)
wherein DS
B
2, DS
B
3, and DS
B
6 represent a substitution degree of the substituent B at the 2-, 3-, or 6-position of a β-glucose ring constituting unit of cellulose, respectively; and
an optical compensation film, a polarizing plate, and a liquid crystal display device, using the cellulose compound film.
Cellulose Acylate Film, Method of Producing the Same, Cellulose Derivative Film, Optically Compensatory Film Using the Same, Optically-Compensatory Film Incorporating Polarizing Plate, Polarizing Plate and Liquid Crystal Display Device
申请人:Haruta Hiromoto
公开号:US20090290100A1
公开(公告)日:2009-11-26
A method of producing a cellulose derivative film, the method comprising: forming a film with a solvent cast method from a dope including a cellulose derivative satisfying following conditions (a) and (b): (a) at least one among three hydroxyl groups included in a glucose unit of cellulose is substituted by a substituent of which a polarizability anisotropy Δα represented as following Expression (1) is 2.5×10
−24
cm
3
or higher: Expression (1): Δα=αx−(αy+αz)/2, wherein αx, αy and αz is as defined in the specification; and (b) when a substitution degree by a substituent of which Δα is 2.5×10
−24
cm
3
or higher is P
A
, and a substitution degree by a substituent of which Δα is lower than 2.5×10
−24
cm
3
is P
B
, the P
A
and P
B
satisfy following Expressions (3) and (4): Expression (3): 2P
A
+P
B
>3.0; and Expression (4): P
A
>0.2.
Agent dispenser with microporous releasing diffusor
申请人:ALZA CORPORATION
公开号:EP0040457A2
公开(公告)日:1981-11-25
A dispenser is disclosed for delivering an active agent to an aqueous environment. The dispenser comprises an internal compartment with a partition that divides the compartment into a first space and a second space. The first space contains the active agent and the second space contains a gel or an osmotically effective compound. An exterior wall of a microporous polymer, or a microporous polymer and a semi- permeable polymer surrounds the compartment.
Copolyamides et compositions de polyamides, procédé de fabrication et applications
申请人:ELF ATOCHEM S.A.
公开号:EP0903366A1
公开(公告)日:1999-03-24
Ce copolyamide résultant de la polycondensation d'un mélange de docécanlactame (L12) ou d'acide 12-amino-dodécanoïque (A12) ; et d'acide 11-amino-undécanoïque (A11), est caractérisé par le fait que le monomère L12 ou A12 représente 1 à 15% ou 85 à 99% en poids du mélange, les relations suivantes étant vérifiées pour les points de fusion (PF) en fonction de la composition, les motifs provenant du monomère A12 et L12 étant respectivement majoritaires ou minoritaires :
(1) A12 ou L12 majoritaire :PF (°C) ≥ 176-0,567 x (% A11)
(2) A12 ou L12 minoritaire:PF (°C) ≥ 187-0,5 x (% A12 ou L12),
lesdits points de fusion étant déterminés en prenant les pics des signaux des exothermes obtenus en thermoanalyse différentielle avec une vitesse de chauffage de 10°C/minute pour le deuxième passage de chauffe.
De tels copolyamides ont une propriété de résilience à basse température et une propriété de souplesse améliorée, notamment lorsque du plastifiant leur est ajouté. Leur température de transition ductile/fragile est déplacée vers une température plus basse.