scholarly journals Absolute asymmetric Strecker synthesis in a mixed aqueous medium: reliable access to enantioenriched α-aminonitrile

2019 ◽  
Vol 17 (5) ◽  
pp. 1238-1244 ◽  
Author(s):  
Shinobu Miyagawa ◽  
Shohei Aiba ◽  
Hajime Kawamoto ◽  
Yuji Tokunaga ◽  
Tsuneomi Kawasaki
Keyword(s):  
Aqueous Medium ◽  
Spontaneous Resolution ◽  
Strecker Synthesis ◽  
Aqueous Conditions

Under aqueous conditions, total spontaneous resolution of α-aminonitrile occurred by the reaction of three achiral reagents; therefore, absolute asymmetric Strecker synthesis was demonstrated.

Synthesis of coenzyme A thioesters using methyl acyl phosphates in an aqueous medium

2014 ◽  
Vol 12 (48) ◽  
pp. 9760-9763 ◽  
Author(s):  
Mohan Pal ◽  
Stephen L. Bearne
Keyword(s):  
Aqueous Medium ◽  
Carboxylic Acids ◽  
Coenzyme A ◽  
Aromatic Carboxylic Acids ◽  
Phosphate Monoesters ◽  
Aqueous Conditions ◽  
Acyl Phosphate

Regioselective S-acylation of coenzyme A is achieved under aqueous conditions using various aliphatic and aromatic carboxylic acids activated as their methyl acyl phosphate monoesters.

scholarly journals Bio-inspired NHC-organocatalyzed Stetter reaction in aqueous conditions

RSC Advances ◽  
2020 ◽  
Vol 10 (67) ◽  
pp. 40709-40718
Author(s):  
Mégane Debiais ◽  
Aladin Hamoud ◽  
Reihana Drain ◽  
Philippe Barthélémy ◽  
Valérie Desvergnes
Keyword(s):  
Aqueous Medium ◽  
Stetter Reaction ◽  
Aqueous Conditions

The first bio-inspired N-Heterocyclic Carbene (NHC)-catalyzed Stetter reaction in aqueous medium is reported with benzaldehyde and chalcone as model substrates.

scholarly journals Prebiotic Phosphorylation of Uridine using Diamidophosphate in Aerosols

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
A. D. Castañeda ◽  
Z. Li ◽  
T. Joo ◽  
K. Benham ◽  
B. T. Burcar ◽  
...  
Keyword(s):  
Aqueous Medium ◽  
Slow Rate ◽  
Reaction Rates ◽  
Bulk Solution ◽  
Early Earth ◽  
Suitable Model ◽  
Proof Of Concept ◽  
Air Interface ◽  
Relevant Compound ◽  
Aqueous Conditions

Abstract One of the most challenging fundamental problems in establishing prebiotically plausible routes for phosphorylation reactions using phosphate is that they are thermodynamically unfavorable in aqueous conditions. Diamidophosphate (DAP), a potentially prebiotically relevant compound, was shown to phosphorylate nucleosides in aqueous medium, albeit at a very slow rate (days/weeks). Here, we demonstrate that performing these reactions within an aerosol environment, a suitable model for the early Earth ocean-air interface, yields higher reaction rates when compared to bulk solution, thus overcoming these rate limitations. As a proof-of-concept, we demonstrate the effective conversion (~6.5–10%) of uridine to uridine-2′,3′-cyclophosphate in less than 1 h. These results suggest that aerosol environments are a possible scenario in which prebiotic phosphorylation could have occurred despite unfavorable rates in bulk solution.

Rheological behaviour of the condensed suspension of fluorinated montmorillonite “rassoul” particles in aqueous medium

2005 ◽  
Vol 123 ◽  
pp. 341-344
Author(s):  
A. Khaldoun ◽  
F. González-Caballero ◽  
J. G. López-Durán ◽  
N. Mahrach ◽  
M. L. Kerkeb
Keyword(s):  
Aqueous Medium ◽  
Rheological Behaviour

A Case of Spontaneous Resolution of Castleman's Disease in the Neck

2012 ◽  
Vol 55 (11) ◽  
pp. 736
Author(s):  
Seong-Hyun Yun ◽  
Soo-Ryang Chae ◽  
Dong-Joon Yoo ◽  
Young-Hoon Joo
Keyword(s):  
Castleman’S Disease ◽  
Spontaneous Resolution ◽  
Castleman's Disease

Spontaneous resolution of hypothalamic amenorrhea post diagnostic GnRH test

2015 ◽  
Author(s):  
G K Dimitriadis ◽  
M O Weickert ◽  
T M Barber ◽  
H S Randeva
Keyword(s):  
Spontaneous Resolution ◽  
Hypothalamic Amenorrhea

Changes of Magnetic Characteristics of iron Oxides and Hydroxides in Aqueous Medium

2017 ◽  
Vol 39 (1) ◽  
pp. 46-52
Author(s):  
T. SAVCHENKO ◽  
◽  
A. GRECHANOVSKY ◽  
A. BRIK ◽  
N. DUDCHENKO
Keyword(s):  
Aqueous Medium ◽  
Iron Oxides ◽  
Magnetic Characteristics
Sign in / Sign up

Export Citation Format

Share Document