Kinetic Model for Gelation in the Diepoxide−Cyclic Anhydride Copolymerization Initiated by Tertiary Amines

1997 ◽  
Vol 30 (6) ◽  
pp. 1616-1620 ◽  
Author(s):  
A. N. Mauri ◽  
N. Galego ◽  
C. C. Riccardi ◽  
R. J. J. Williams
Keyword(s):  
Kinetic Model ◽  
Tertiary Amines ◽  
Cyclic Anhydride

Determination of fatty alcohol ethoxylates and alkylether sulfates by anionic exchange separation, derivatization with a cyclic anhydride and liquid chromatography

2011 ◽  
Vol 1218 (47) ◽  
pp. 8511-8518 ◽  
Author(s):  
M. Beneito-Cambra ◽  
L. Ripoll-Seguer ◽  
J.M. Herrero-Martínez ◽  
E.F. Simó-Alfonso ◽  
G. Ramis-Ramos
Keyword(s):  
Liquid Chromatography ◽  
Fatty Alcohol ◽  
Alcohol Ethoxylates ◽  
Cyclic Anhydride ◽  
Anionic Exchange

Steroidal adducts. II. Stereoselectivity in .gamma.-lactone synthesis from a steroidal cyclic anhydride

1970 ◽  
Vol 35 (3) ◽  
pp. 558-561 ◽  
Author(s):  
Mary E. Birckelbaw ◽  
P. W. Le Quesne ◽  
Clarice K. Wocholski
Keyword(s):  
Cyclic Anhydride ◽  
Lactone Synthesis

Darstellung von o-Phenylen-bis(dibromphosphan) — Reaktionsprodukte von o-Phenylen-bis(dichlorphosphan) / Synthesis of o-Phenylene-bis(dibromophosphane) — Reaction Products of o-Phenylene-bis(dichlorophosphane)

1984 ◽  
Vol 39 (12) ◽  
pp. 1706-1710 ◽  
Author(s):  
H.-J. Wörz ◽  
E. Quien ◽  
H. P. Latscha
Keyword(s):  
Hydrogen Peroxide ◽  
Hydrogen Bromide ◽  
Equimolar Amount ◽  
Reaction Products ◽  
Large Excess ◽  
Cyclic Anhydride ◽  
Complete Hydrolysis ◽  
Hydrolysis Of

o-Phenylene-bis(dibromophosphane) (1) is prepared by reaction of P ,P,P′,P′-tetrakis(dim ethylamino)-o-phenylenediphosphane with hydrogen bromide in ether. The reaction of o-phenylene- bis(dichlorophosphane) (2) with CH3OH in ether yields o-phenylene-bis(phosphonousacid- dimethylester) (3). The Michaelis-Arbuzov conversion of 3, either by heat or by catalytic amounts of CH3I in toluene, yields ophenylene-bis(methylphosphinic-acid-methylester) (4). The reduction of 2 must be carried out with a large excess of LiAlH4 (1:4) in ether to give o-phenylenediphosphane (5). The cyclic anhydride (6) of P.P′-dichloro-o-phenylenediphosphonous acid is formed when 2 is hydrolyzed in ether with an equimolar amount of water. Complete hydrolysis of 2 with an excess of water gives o-phenylenediphosphonous acid (7). With hydrogen peroxide o-phenylenediphosphonic acid (8) can be isolated.

scholarly journals Concise Synthesis of Macrocycles by Multicomponent Reactions

Synthesis ◽  
2018 ◽  
Vol 50 (05) ◽  
pp. 1027-1038 ◽  
Author(s):  
Alexander Dömling ◽  
Eman Abdelraheem ◽  
Samad Khaksar
Keyword(s):  
Amino Acid ◽  
Multicomponent Reaction ◽  
Ring Opening ◽  
Multicomponent Reactions ◽  
Reaction Pathway ◽  
Ring Closure ◽  
Side Chains ◽  
Reaction Sequence ◽  
Cyclic Anhydride

A short reaction pathway was devised to synthesize a library of artificial 18–27-membered macrocycles. The five-step reaction sequence involves ring opening of a cyclic anhydride with a diamine, esterification, coupling with an amino acid isocyanide, saponification, and, finally, macro-ring closure using an Ugi or, alternatively, a Passerini multicomponent reaction. Three out of the five steps allow for the versatile introduction of linker elements, side chains, and substituents with aromatic, heteroaromatic, and aliphatic character. The versatile pathway is described for 15 different target macrocycles on a mmol scale. Artificial macrocycles have recently become of great interest due to their potential to bind to difficult post-genomic targets.

scholarly journals DSC-FTIR microspectroscopy used to investigate the heat-induced intramolecular cyclic anhydride formation between Eudragit E and PVA copolymer

2011 ◽  
Vol 43 (6) ◽  
pp. 577-580 ◽  
Author(s):  
Shan-Yang Lin ◽  
Wen-Ting Cheng ◽  
Yen-Shan Wei ◽  
Hong-Liang Lin
Keyword(s):  
Cyclic Anhydride ◽  
Ftir Microspectroscopy ◽  
Eudragit E
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