Tag: M.W=150-200

Nagano, Masanobu; Tanaka, Masakazu; Doi, Mitsunobu; Demizu, Yosuke; Kurihara, Masaaki; Suemune, Hiroshi published the artcile< Helical-Screw Directions of Diastereoisomeric Cyclic α-Amino Acid Oligomers>, HPLC of Formula: 617-55-0, the main research area is oligomer cyclic amino acid diastereomer preparation helical secondary structure.

Two series of homooligomers composed of diastereoisomeric cyclic α-amino acids having two chiral centers at the α-carbon and the side chain were synthesized, and their preferred secondary structures were studied in solution and in the crystal state. The oligomers are a new class of helical-foldamers possessing two kinds of chiral centers on the helical backbone and at the lateral surface of the helix.

Organic Letters published new progress about Crystal structure. 617-55-0 belongs to class esters-buliding-blocks, and the molecular formula is C6H10O5, HPLC of Formula: 617-55-0.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Chen, An-jun; Luo, Wei; Niu, Kai-li; Peng, Yi-tao; Liu, Xing-yan; Shen, Guang-hui; Zhang, Zhi-qing; Wan, Hu; Luo, Qing-ying; Li, Shan-shan published the artcile< Research on the relationship between sensory profile and physicochemical properties of paocai, a Chinese fermented vegetable>, SDS of cas: 94-02-0, the main research area is paocai fermented vegetable sensory profile physicochem property.

Paocai is a popular fermented vegetable side dish or appetizer in China. This study was to investigate the relationship between its sensory quality and physicochem. properties by different statistical methods and to establish a regression prediction model for sensory scores. Principal component anal. disclosed that the sensory properties were neg. correlated with lactic acid and acetic acid contents. The cluster anal. classified the samples into three groups based on their sensory scores and the main differences among the groups were firmness, salinity, and acid production Finally, a prediction model with an adjusted R2 of 85.28% was established by partial least squares regression to predict the sensory scores and showed high reliability on six tested samples. Practical applications : Paocai is a popular side dish or appetizer in China that has a large annual production and consumption. Nowadays, the evaluation of the quality of paocai is mainly relied on sensory assessment, which is expensive to implement, time-consuming, and sometimes cannot be implemented online for immediate feedback. By establishing the relationship between sensory quality and physicochem. properties of paocai, it is possible to build online feedback of paocai production by instrumental detections.

Journal of Food Processing and Preservation published new progress about Alcohols Role: BUU (Biological Use, Unclassified), BIOL (Biological Study), USES (Uses). 94-02-0 belongs to class esters-buliding-blocks, and the molecular formula is C11H12O3, SDS of cas: 94-02-0.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Yang, Yiwei; Kong, Mengya; Feng, Pengfei; Meng, Ruiqian; Wei, Xiaohe; Su, Pingru; Cao, Jing; Feng, Wei; Liu, Weisheng; Tang, Yu published the artcile< Self-Assembly of Heterogeneous Structured Rare-Earth Nanocrystals Controlled by Selective Crystal Etching and Growth for Optical Encoding>, Recommanded Product: Ethyl 3-oxo-3-phenylpropanoate, the main research area is self assembly rare earth nanocrystal etching optical encoding.

Programmatically assembling inorganic nanocrystals (NCs) into long-range-ordered superstructures has been well-documented as a theme to construct novel materials with unique properties. Herein, one-dimensional oriented self-assembly of core-shell structured rare-earth doped β-NaREF4 NCs is reported. In the epitaxial growth process, β-NaREF4 crystals featuring larger neg. lattice mismatch usually exhibited longitudinal growth preference. In this case, the lateral crystal of the hexagonal prisms would be etched by OA- ions along the direction parallel to the (001) facets. This anisotropic morphol. evolution can lead to the anisotropic noncovalent interactions between long-chain alkyls of oleic acid mols. and contribute to the oriented self-assembly in the 〈001〉 direction. On the basis of the studies on the heterogeneous NC self-assembly, a rare-earth nanohybrid assembly is further prepared by functionalizing the NC surface with a pH-responsive ligand N-(2-pyridinyl)benzoylacetamide (HPBA), and this nanohybrid self-assembly exhibits great potential in spatial-temporal dimensional optical encoding. This study provides a novel strategy based on selective crystal etching and epitaxial growth for oriented self-assembly of NCs and represents an important step toward the design of well-defined superstructures with unique properties.

ACS Applied Nano Materials published new progress about Coded information. 94-02-0 belongs to class esters-buliding-blocks, and the molecular formula is C11H12O3, Recommanded Product: Ethyl 3-oxo-3-phenylpropanoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Qin, Zemin; Ma, Renchao; Ying, Shenpeng; Li, Fanzhu; Ma, Yongmin published the artcile< Synthesis of Substituted Pyrimido[1,2-b]indazoles through (3+2+1) Cyclization of 3-Aminoindazoles, Ketones, and N,N-Dimethylaminoethanol as One-Carbon Synthon>, Electric Literature of 94-02-0, the main research area is pyrimidoindazole preparation; aminoindazole ketone dimethylaminoethanol three component cyclization.

The 2-mono- or 2,3-disubstituted pyrimido[1,2-b]indazoles I (R1 = Ph, thiophen-2-yl, naphth-2-yl, etc.; R2 = H, Me; R3 = H, 10-Br, 9-Br, 8-Br, etc.) are synthesized by a (3+2+1) three-component cyclization of 3-aminoindazoles II, ketones R1C(O)CH2R2 and N,N-dimethylaminoethanol as a methine source. The reaction demonstrates good tolerance of both aromatic and aliphatic ketones, as well as various substitution patterns in air.

Advanced Synthesis & Catalysis published new progress about Cyclization ((3+2+1)). 94-02-0 belongs to class esters-buliding-blocks, and the molecular formula is C11H12O3, Electric Literature of 94-02-0.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Xing, Bo; Ni, Chuanfa; Hu, Jinbo published the artcile< Hypervalent Iodine(III) Catalyzed Balz-Schiemann Fluorination under Mild Conditions>, Reference of 30095-98-8, the main research area is arenediazonium tetrafluoroborate Balz Schiemann fluorination hypervalent iodine catalyst; fluoride aryl preparation; Balz-Schiemann reaction; aryl fluorides; diazonium salts; fluorination; iodine.

An unprecedented hypervalent iodine(III)-catalyzed Balz-Schiemann reaction was described. In the presence of a hypervalent iodine compound, the fluorination reaction proceeded under mild conditions (25-60 °C), and featured a wide substrate scope and good functional-group compatibility.

Angewandte Chemie, International Edition published new progress about Aryl fluorides Role: SPN (Synthetic Preparation), PREP (Preparation). 30095-98-8 belongs to class esters-buliding-blocks, and the molecular formula is C9H9NO4, Reference of 30095-98-8.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Yao, Guangkai; Wang, Bing-Feng; Yang, Shuai; Zhang, Zhi-Xiang; Xu, Han-Hong; Tang, Ri-Yuan published the artcile< DMSO-mediated palladium-catalyzed cyclization of two isothiocyanates via C-H sulfurization: a new route to 2-aminobenzothiazoles>, SDS of cas: 19241-24-8, the main research area is aryl isothiocyanate DMSO palladium bromide heterocyclization sulfurization tandem reaction; arylaminobenzothiazole preparation.

DMSO was found to activate arylisothiocyanates for self-nucleophilic addition A subsequent intramol. C-H sulfurization catalyzed by PdBr2 enable accessed to a wide range of 2-aminobenzothiazole derivatives in moderate to good yields. This is the first example of a DMSO-mediated Pd-catalyzed synthesis of 2-aminobenzothiazoles through cyclization/C-H sulfurization of two isothiocyanates.

RSC Advances published new progress about Aromatic amines Role: SPN (Synthetic Preparation), PREP (Preparation). 19241-24-8 belongs to class esters-buliding-blocks, and the molecular formula is C11H13NS, SDS of cas: 19241-24-8.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Aponick, Aaron; Li, Chuan-Ying; Palmes, Jean A. published the artcile< Au-Catalyzed cyclization of monopropargylic triols: an expedient synthesis of monounsaturated spiroketals>, Computed Properties of 617-55-0, the main research area is spiroketal derivative preparation; monopropargylic triol preparation cyclization gold; gold cyclization catalyst.

The gold-catalyzed cyclization of monopropargylic triols to form olefin-containing spiroketals is reported. The reactions are rapid and high yielding when 2 mol % of the catalyst generated in situ from Au[P(t-Bu)2(o-biphenyl)]Cl and AgOTf is employed in THF at 0 °C. A range of differentially substituted triols leading to substituted 5- and 6-membered ring spiroketals were prepared and function well in the reaction.

Organic Letters published new progress about Cyclization. 617-55-0 belongs to class esters-buliding-blocks, and the molecular formula is C6H10O5, Computed Properties of 617-55-0.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Nawghare, Beena R.; Lokhande, Pradeep D. published the artcile< First iodine-catalyzed deallylation of reactive allyl methylene esters>, HPLC of Formula: 30095-98-8, the main research area is allyl methylene ester iodine catalyzed deallylation lactonization.

A C-allyl cleavage was developed using inexpensive and mild I2 in DMSO. A variety of compounds with active methylene groups were C-deallylated using this reagent. This method is efficient and operationally simple in comparison to the methods using transition-metal complexes.

Synthetic Communications published new progress about Active methylene compounds Role: RCT (Reactant), RACT (Reactant or Reagent). 30095-98-8 belongs to class esters-buliding-blocks, and the molecular formula is C9H9NO4, HPLC of Formula: 30095-98-8.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Pogaku, Naresh; Krishna, Palakodety Radha; Prapurna, Y. Lakshmi published the artcile< Iodine-Mediated Nucleophilic Direct Oxidative α-Acetoxylation and α-Alkoxylation of Ketones>, SDS of cas: 94-02-0, the main research area is ketone ammonium acetate iodine catalyst oxidative acetoxylation green chem; oxo ethyl acetate preparation; methanol phenylethanone iodine catalyst oxidative alkoxylation green chem; methoxy phenylethanone preparation.

A general and facile approach for the direct α-functionalization of ketones mediated by iodine was developed. The operational simplicity, easily available starting materials, mild reaction conditions and tolerance of wide range of functional groups are the major benefits of the reaction.

ChemistrySelect published new progress about Acetals Role: SPN (Synthetic Preparation), PREP (Preparation). 94-02-0 belongs to class esters-buliding-blocks, and the molecular formula is C11H12O3, SDS of cas: 94-02-0.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Clark, J. Stephen; Fessard, Thomas C.; Wilson, Claire published the artcile< A Concise and Stereoselective Synthesis of the A-Ring Fragment of the Gambieric Acids>, Formula: C6H10O5, the main research area is asym synthesis gambieric acid ring fragment rearrangement oxonium ylide.

The A-ring fragment I of the gambieric acids has been prepared by a short and efficient route. The key 3(2H)-furanone intermediate has been obtained by [2,3] rearrangement of an allylic oxonium ylide generated from intramol. reaction of a crotyl ether with a copper carbenoid. A single stereogenic center has been set by using a chiral pool starting material and the other three have been established by using highly diastereoselective substrate-controlled transformations.

Organic Letters published new progress about Rearrangement ([2,3]-rearrangement). 617-55-0 belongs to class esters-buliding-blocks, and the molecular formula is C6H10O5, Formula: C6H10O5.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics