Combination of Aerobic/Moisture/Ambient Temperature Compatible Organolithium Chemistry with Sustainable Solvents: Selective and Efficient Synthesis of Guanidines and Amidines

2021 ◽  
Author(s):  
Joaquín García-Álvarez ◽  
David Elorriaga ◽  
Fernando Carrillo-Hermosilla ◽  
Antonio Antiñolo ◽  
Blanca Parra-Cadenas
Keyword(s):  
Ambient Temperature ◽  
Primary Amine ◽  
Efficient Synthesis ◽  
Acid Base ◽  
Highly Efficient ◽  
Lithium Amides ◽  
Sustainable Solvents ◽  
Organolithium Chemistry

Highly-efficient and selective fast addition of in-situ generated lithium amides [LiN(H)R] (obtained via acid-base reaction between n-BuLi and the desired primary amine) into carbodiimides (R-N=C=N-R) or nitriles (R-C≡N) has been...

scholarly journals Ultrafast amidation of esters using lithium amides under aerobic ambient temperature conditions in sustainable solvents

2020 ◽  
Vol 11 (25) ◽  
pp. 6500-6509 ◽  
Author(s):  
Michael Fairley ◽  
Leonie J. Bole ◽  
Florian F. Mulks ◽  
Laura Main ◽  
Alan R. Kennedy ◽  
...  
Keyword(s):  
Ambient Temperature ◽  
Organometallic Chemistry ◽  
Room Temperature ◽  
Temperature Conditions ◽  
Lithium Amides ◽  
Sustainable Solvents

Using 2-methyl THF as solvent enables efficient and ultrafast amidation of esters by lithium amides at room temperature in air, edging closer towards reaching air- and moisture-compatible polar organometallic chemistry.

scholarly journals Cerium (IV) Ammonium Nitrate (CAN) Mediated Reactions IV. A Highly Efficient Synthesis of N,N’-Diarylsubstituted Formamidines in Water at Ambient Temperature

2011 ◽  
Vol 01 (03) ◽  
pp. 92-97 ◽  
Author(s):  
Kamal Usef Sadek ◽  
Abdulaziz Alnajjar ◽  
Ramadan Ahmed Mekheimer ◽  
Nasr Kamel Mohamed ◽  
Haney A. Mohamed
Keyword(s):  
Ambient Temperature ◽  
Ammonium Nitrate ◽  
Efficient Synthesis ◽  
Highly Efficient ◽  
Cerium Iv Ammonium Nitrate

Copper immobilized on nano-silica triazine dendrimer (Cu(ii)-TD@nSiO2) catalyzed synthesis of symmetrical and unsymmetrical 1,3-diynes under aerobic conditions at ambient temperature

RSC Advances ◽  
2014 ◽  
Vol 4 (27) ◽  
pp. 14291-14296 ◽  
Author(s):  
Mahboobeh Nasr-Esfahani ◽  
Iraj Mohammadpoor-Baltork ◽  
Ahmad Reza Khosropour ◽  
Majid Moghadam ◽  
Valiollah Mirkhani ◽  
...  
Keyword(s):  
Ambient Temperature ◽  
Efficient Synthesis ◽  
Nano Silica ◽  
Aerobic Conditions ◽  
Highly Efficient

Highly efficient synthesis of symmetrical and unsymmetrical 1,3-diynes catalyzed by Cu(ii)-TD@nSiO2/DBU is reported.

scholarly journals Green and Highly Efficient Synthesis of 2-Arylbenzothiazoles Using Glycerol without Catalyst at Ambient Temperature

Molecules ◽  
2012 ◽  
Vol 17 (5) ◽  
pp. 6011-6019 ◽  
Author(s):  
Kamal Usef Sadek ◽  
Ramadan Ahmed Mekheimer ◽  
Afaf Mohamed Abdel Hameed ◽  
Fatma Elnahas ◽  
Mohamed Hilmy Elnagdi
Keyword(s):  
Ambient Temperature ◽  
Efficient Synthesis ◽  
Highly Efficient

scholarly journals Green, three component highly efficient synthesis of 2-amino-5,6,7,8-tetrahydro-4-H-chromen-3-carbonitriles in water at ambient temperature

2010 ◽  
Vol 3 (3) ◽  
pp. 161-163 ◽  
Author(s):  
Ramadan A. Mekheimer ◽  
Afaf M. Abdelhameed ◽  
Sawsan M. Mohamed ◽  
Kamal Usef Sadek
Keyword(s):  
Ambient Temperature ◽  
Efficient Synthesis ◽  
Highly Efficient

SEM of non-coated hepatocellular cytoskeleton of perfused livers

1984 ◽  
Vol 42 ◽  
pp. 306-307
Author(s):  
S.W. French ◽  
N.C. Benson ◽  
C. Davis-Scibienski
Keyword(s):  
Ambient Temperature ◽  
Critical Point ◽  
Protease Inhibitors ◽  
Metal Deposition ◽  
Heat Damage ◽  
Detergent Extraction ◽  
Cytoskeletal Elements ◽  
Triton X ◽  
Excised Tissue

Previous SEM studies of liver cytoskeletal elements have encountered technical difficulties such as variable metal coating and heat damage which occurs during metal deposition. The majority of studies involving evaluation of the cell cytoskeleton have been limited to cells which could be isolated, maintained in culture as a monolayer and thus easily extracted. Detergent extraction of excised tissue by immersion has often been unsatisfactory beyond the depth of several cells. These disadvantages have been avoided in the present study. Whole C3H mouse livers were perfused in situ with 0.5% Triton X-100 in a modified Jahn's buffer including protease inhibitors. Perfusion was continued for 1 to 2 hours at ambient temperature. The liver was then perfused with a 2% buffered gluteraldehyde solution. Liver samples including spontaneous tumors were then maintained in buffered gluteraldehyde for 2 hours. Samples were processed for SEM and TEM using the modified thicarbohydrazide procedure of Malich and Wilson, cryofractured, and critical point dried (CPD). Some samples were mechanically fractured after CPD.

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