Novel keto–enol tautomerism in 1,3,5-trihydroxybenzene systems

2020 ◽  
Vol 56 (85) ◽  
pp. 12985-12988
Author(s):  
Makabodee Ruaysap ◽  
Stuart R. Kennedy ◽  
Collin M. Mayhan ◽  
Steven P. Kelley ◽  
Harshita Kumari ◽  
...  
Keyword(s):  
Solvent Effects ◽  
Lanthanide Complexes ◽  
Water Soluble ◽  
Implicit Solvent ◽  
Tautomeric Forms ◽  
New Synthesis ◽  
Water Soluble Compound ◽  
Soluble Compound

We report a new synthesis of the water-soluble compound 1,3,5-trihydroxy-2,4,6-trimethylsulfonic acid (1), which exists in two tautomeric forms (60 : 40::enol%:keto%), and its lanthanide complexes. Relative tautomer stability is influenced by intramolecular H-bonding and competing implicit solvent effects.

Synthesis of propylene glycol phospholipids: analogues of α-lecithins and α-cephalins

1968 ◽  
Vol 46 (1) ◽  
pp. 69-74 ◽  
Author(s):  
Erich Baer ◽  
Angus J. Duke ◽  
Dmytro Buchnea
Keyword(s):  
Propylene Glycol ◽  
Hemolytic Activity ◽  
Polyhydric Alcohol ◽  
Water Soluble ◽  
Asymmetric Center ◽  
Water Soluble Compound ◽  
Soluble Compound ◽  
Dipalmitoyl Lecithin

The synthesis of phospholipids derived from propylene glycol, structurally the least complex polyhydric alcohol to possess an asymmetric center, is described. Representatives of two types of propylene glycol phospholipids were prepared. They are analogues of α-(dipalmitoyl)lecithin and α-(dipalmitoyl)cephalin, and were obtained from D-propylene glycol via the following two series of intermediates: (A) α-trityl D-propylene glycol (I) → α-trityl, β-palmitoyl D-propylene glycol (II) → β-palmitoyl D-propylene glycol (III) → β-palmitoyl D-propylene glycol-α-(phenyl)phosphorylcholine chloride (IV) → β-palmitoyl D-propylene glycol-α-phosphorylcholine (V); and (B) I → II → III → β-palmitoyl D-propylene glycol-α-(phenyl)phosphoryl-N-carbobenzoxyethanolamine (VI) → β-palmitoyl D-propylene glycol-α-phosphorylethanolamine (VII). The palmitoyl D-propylene glycol-α-phosphorylcholine, a highly water-soluble compound, possesses strong hemolytic activity, whereas the palmitoyl D-propylene glycol-α-phosphorylethanolamine has no hemolytic properties whatsoever.

Darstellung von Peroxotantalaten durch Perhydrolyse von Tantal(V)-äthanolat / Preparation of Peroxotantalates by Perhydrolysis of Tantalum(V)ethoxide

1973 ◽  
Vol 28 (9-10) ◽  
pp. 590-594 ◽  
Author(s):  
J. Fuchs ◽  
D. Lubkoll
Keyword(s):  
Petroleum Ether ◽  
Molecular Mass ◽  
Water Soluble ◽  
Organic Cations ◽  
Water Soluble Compound ◽  
Soluble Compound ◽  
First Time

Tetraperoxotantalates with organic cations as well as an oligomeric peroxopolytantalate were prepared for the first time by perhydrolysis of tantalum(V)ethoxide, Ta(OC2H5)5, in the presence of bases. Guanidinium, tert-butylammonium and cyclohexylammonium salts of tetraperoxotantalic acid crystallize from ethanol as relatively stable compounds. The cell constants of these compounds are determined. By perhydrolysis of the ester in petroleum ether the tert-butylammonium salt of a peroxododecantalic acid was obtained. The molecular mass of this water soluble compound was determined with the ultracentrifuge.

Sustained release of a model water-soluble compound via dry powder aerosolizable acetalated dextran microparticles

2019 ◽  
Vol 24 (9) ◽  
pp. 1133-1143 ◽  
Author(s):  
Nishan K. Shah ◽  
Zimeng Wang ◽  
Sweta K. Gupta ◽  
Andrew Le Campion ◽  
Samantha A. Meenach
Keyword(s):  
Sustained Release ◽  
Water Soluble ◽  
Dry Powder ◽  
Water Soluble Compound ◽  
Soluble Compound ◽  
Model Water

scholarly journals KARAKTERISTIK SIMPLISIA TEH HITAM DARI TANAMAN Camelia sinensis Var. assamica DARI PERKEBUNAN TEH BALI CAHAYA AMERTA, DESA ANGSERI, KECAMATAN BATURITI, KABUPATEN TABANAN, BALI

Jurnal Kimia ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 58
Author(s):  
N. L.P.V. Paramita ◽  
N. M. D. Andani ◽  
I. A. P. Y. Putri ◽  
N. K. S. Indriyani ◽  
N. M. P. Susanti
Keyword(s):  
Vascular Tissue ◽  
Black Tea ◽  
Tea Plant ◽  
Ash Content ◽  
Water Soluble ◽  
Water Soluble Compound ◽  
Soluble Compound ◽  
Characterization Test ◽  
High Degree

Black tea is a type of tea in such a way the polyphenols undergo a high degree of oxidation. The characteristics of simplicia are strongly influenced by the environment. In order to use a simplicia as an active ingredient, characterization test are required for maintaining the quality and safety. This study aimed to find out the characteristic of black tea simplicia from tea leaves (Camellia sinensis var. assamica) which were taken from Bali Cahaya Amerta Tea Plantation, Angseri Village, Baturiti Sub-district, Tabanan Regency, Bali. The characterization of the simplicia was done based on standard parameters of tea plant in Farmakope Herbal Indonesia including macroscopic test, microscopic test, the loss on drying, the contents of water soluble compound, ethanol soluble compound, total ash, acid insoluble ash, total phenol and the identification of cathecin. The results showed that black tea simplicia elongated shaped with blackish brown, odorless, tasteless, and there were fragments identifier such as sclerenkim fibers, epidermis with stomata, macrosklerida, leaf mesophyll with vascular tissue, and rosette calcium oxalate crystals. The result of the compounds content that dissolve in water was 31.84% ± 0.6446%, compounds content that dissolve in ethanol was 16.64% ± 0.414%, the loss on drying was 5.19% ± 0.0902%, total ash content was 4.67% ± 0.0392%, ash content that was insoluble in acid was 0.19% ± 0.0025%, and the total fenol content was 0.9733% ± 0.0189%. From the results, the black tea simplicia fulfills the requirements of simplicia characteristic based on Farmakope Herbal Indonesia parameter.

Design of sustained-release matrix systems for a highly water-soluble compound, ABT-089

1997 ◽  
Vol 157 (1) ◽  
pp. 43-52 ◽  
Author(s):  
Yihong Qiu ◽  
Kolette Flood ◽  
Kennan Marsh ◽  
Sherry Carroll ◽  
Jay Trivedi ◽  
...  
Keyword(s):  
Sustained Release ◽  
Water Soluble ◽  
Water Soluble Compound ◽  
Soluble Compound

scholarly journals INFLUENCE OF FOLIAR FERTILIZATION OF WINTER WHEAT WITH WATER SOLUBLE COMPOUND FERTILIZER WITH MICROELEMENTS "POLY-FEED" FOR YIELD AND QUALITY GRAIN IN THE CONDITIONS OF THE ORYOL REGION

2019 ◽  
pp. 74-79
Author(s):  
S. Yu. Dorogavtsev ◽  
E. V. Sobolev ◽  
M. M. Tareeva ◽  
A. Yu. Burtsev ◽  
A. I. Gorbunov ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Organic Fertilizer ◽  
Water Soluble ◽  
Mineral Fertilizers ◽  
Grain Crops ◽  
Compound Fertilizer ◽  
Water Soluble Compound ◽  
Adverse Weather ◽  
Soluble Compound ◽  
The Impact

Often in the soils of crop rotations of grain crops, including on black soil, the content of mobile forms of copper, manganese, zinc and other trace elements is low. Improving the efficiency of making micronutrients for grain crops and determining the best ways and doses of their introduction are topical issues that need to be addressed in order to increase the productivity of crops. The purpose of research is to identify the effectiveness of the use of water soluble compound fertilizer with microelements of the company “Haifa Chemicals” in the technology of growing winter wheat on leached chernozem under conditions of the Oryol Region. Field production experiments were established in 2017-2018 on the basis of Orlovsky Leader LLC Branch №5” located in Livensky district. Field experience with the use of Haifa Chemicals products: Poly-Feed micronutrients 19-19-19 + 1MgO + ME and Poly-Feed 6-15-38 + 3 + ME was laid on soft winter wheat varieties Moskovskaya-56.The control variant was the basic technological scheme used in the household for carrying out leaf dressings with mineral fertilizers together with the organic fertilizer Gumostim. As a result of the research, it has been established that the use of double foliar feeding water soluble compound fertilizer with microelements Poly-Feed 19-19-19 + 1MgO + ME in the tillering stage and at the end of flowering and a single Poly-Feed 6-15-38 + 3 + IU in the subflag phase - flag leaf, increases the height of the plants, as well as the productive characteristics of the ear: the size of the ear, the number of grains in the ear, the mass of grains and their best quality, which in general provides a reliable increase in the yield of grain of winter wheat. At the same time, it was found that, due to leaf feeding, the impact of adverse weather conditions under which the development of winter wheat plants took place in 2018 and their productive properties were laid was leveled out. Due to relatively low additional costs, the use of complex fertilizers of the Poly-Feed brand for winter wheat is economically feasible and can bring additional economic income: based on the maximum level of minimum prices for the grain of the 2018 harvest, it will be 2.07-2.28 thousand rubles / ha regarding base technology. Thus, water-soluble fertilizers, which include Poly-Feed company "Haifa Chemicals" are recommended to domestic agricultural producers for mass introduction in practice of the technology of intensive sheet nutrition of grain and other crops.

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