Tag: M.W=200-250

Lvov, Andrey G. published the artcilePhotorearrangement of dihetarylethenes as a tool for the benzannulation of heterocycles, Application In Synthesis of 16441-28-4, the main research area is bromo heteroarylethanone heteroaryl acetic acid cyclocondensation reaction; diheteroaryl furanone preparation tandem benzannulation photorearrangement; heteroaryl fused benzofuranone preparation crystal structure.

A general strategy for the preparative benzannulation of aromatic heterocycles via photocyclization of 1,2-dihetarylethenes was proposed for the first time. The strategy included two steps namely, modular assembly of dihetarylethenes from widely available 3-hetarylacetic acids and 2-bromo-1-hetarylethanones and subsequent preparative photorearrangement (using a UV lamp at 365 nm as the light source). This approach was efficient for the annulation of a wide range of heterocycles and provided C-, N-, O- or S-substituents in the benzoheterocycles obtained. The photochem. step was a metal-, acid- and oxidant-free reaction, which required non-inert conditions and easily monitored by NMR spectroscopy. Applicability of the proposed strategy was tested in the synthesis of a wide range of substituted carbazoles and benzo[b]thiophenes as well as on a gram-scale benzannulation of 3-indoleacetic acid. This study disclosed how to overcome two notable obstacles to the successful photorearrangement of dihetarylethenes: undesired reactions associated with photogenerated singlet oxygen and the instability of desired products. The first problem was successfully solved by the addition of DABCO, while development of an in-situ alkylation protocol to trap unstable photoproducts allowed us to overcome the second issue.

Organic & Biomolecular Chemistry published new progress about Benzannulation. 16441-28-4 belongs to class thiazole, name is 2-(2-Phenylthiazol-4-yl)acetic acid, and the molecular formula is C11H9NO2S, Application In Synthesis of 16441-28-4.

Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

Royo, Santiago published the artcileAntiprotozoal and cysteine proteases inhibitory activity of dipeptidyl enoates, Recommanded Product: (S)-4-Benzylthiazolidine-2-thione, the main research area is antiprotozoal cysteine protease inhibitor dipeptidyl enoate derivative preparation; Chagas disease; Cysteine proteases; Inhibitors; Malaria; Sleeping sickness.

A family of dipeptidyl enoates has been prepared and tested against the parasitic cysteine proteases rhodesain, cruzain and falcipain-2 related to sleeping sickness, Chagas disease and malaria, resp. They have also been tested against human cathepsins B and L1 for selectivity. Dipeptidyl enoates resulted to be irreversible inhibitors of these enzymes. Some of the members of the family are very potent inhibitors of parasitic cysteine proteases displaying k2nd (M-1s-1) values of seven orders of magnitude. In vivo antiprotozoal testing was also performed. Inhibitors exhibited IC50 values in the micromolar range against Plasmodium falciparum, Trypanosoma brucei, Trypanosoma cruzi and even more promising lower values against Leishmania donovanii.

Bioorganic & Medicinal Chemistry published new progress about Antimalarials. 171877-39-7 belongs to class thiazole, name is (S)-4-Benzylthiazolidine-2-thione, and the molecular formula is C10H11NS2, Recommanded Product: (S)-4-Benzylthiazolidine-2-thione.

Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

Peixoto, Philippe A. published the artcileFormal Asymmetric Synthesis of Echinopine A and B, Application of (S)-4-Benzylthiazolidine-2-thione, the main research area is echinopine sesquiterpene enantioselective formal synthesis cyclization palladium catalyst; Diels Alder reaction echinopine sesquiterpene enantioselective formal synthesis.

The asym. formal synthesis of (+)-echinopines A and B was accomplished. Particularly noteworthy were the cascade construction of the [5,6,7]tricyclic ring system I (R = SiMe2CMe3) from the acyclic enyne precursor (2Z,6R,7R)-H2C:CHCH(CH2CH2CH:CH2)CH(OSiMe2CMe3)(CH2)2CH:CHCO2Me through a palladium-catalyzed cycloisomerization with subsequent intramol. Diels-Alder reaction, and the strategic application of a late-stage ring contraction of epoxy ketone II (R = SiMe2CMe3).

Angewandte Chemie, International Edition published new progress about Cyclization. 171877-39-7 belongs to class thiazole, name is (S)-4-Benzylthiazolidine-2-thione, and the molecular formula is C10H11NS2, Application of (S)-4-Benzylthiazolidine-2-thione.

Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

Kitir, Betul published the artcileTotal synthesis and structural validation of cyclodepsipeptides solonamide A and B, Safety of (S)-4-Benzylthiazolidine-2-thione, the main research area is cyclodepsipeptide solonamide A B total enantioselective synthesis antimicrobial; macrocycle virulence gene expression Staphylococcus aureus inhibitor cyclodepsipeptide; hydroxy acid stereoselective aldol reaction esterification acylation macrolactamization.

Microorganisms are an attractive source of new natural products with antimicrobial properties, and the marine environment constitutes a prolific resource of bioactive microorganisms. During a global research expedition (Galathea III), two depsipeptides, solonamide A and solonamide B, were isolated from the marine bacterium Photobacterium halotolerance and were found to inhibit virulence gene expression in the serious human pathogen, Staphylococcus aureus. They act by interfering with the agr quorum sensing system and show resemblance to the endogenous S. aureus quorum sensing peptide, autoinducing peptide I (AIP-I). To enable more comprehensive studies, we embarked on the chem. synthesis of solonamides A and B. The key synthetic steps were formation of the (R)-β-hydroxy-fatty-acids by stereoselective aldol reactions and a cyclative macrolactamization, which proceeded under highly dilute conditions. Thus, the first total syntheses of the solonamides corroborated the originally assigned structures, and by changing the stereochem. of the auxiliary in the aldol steps we gained access to the natural products as well as their β3-epimers.

Tetrahedron published new progress about Acylation. 171877-39-7 belongs to class thiazole, name is (S)-4-Benzylthiazolidine-2-thione, and the molecular formula is C10H11NS2, Safety of (S)-4-Benzylthiazolidine-2-thione.

Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

Breinholt, Jens published the artcileSynthesis of 2-amino-4H-thiazolo[5,4-b]indole and characterization of its colored conversion products with protein tyrosine phosphatase inhibitory activity, Category: thiazole, the main research area is thiazoloindolamine preparation reaction; protein tyrosine phosphatase inhibitor thiazoloindolamine reaction product.

In DMSO solution 2-amino-4H-thiazolo[5,4-b]indole (I) is converted to a complex mixture of colored products. The three major conversion end products, two of which are inhibitors of protein tyrosine phosphatases, were isolated by chromatog. methods and their structures characterized by spectroscopic anal., including NMR and MS combined with computer assisted structure elucidation, and, finally, confirmed by independent chem. synthesis. Synthesis of I as well as its N-acetyl derivatives from either oxindole or 2-bromo-1-(2-nitrophenyl)ethanone is described.

Journal of Heterocyclic Chemistry published new progress about thiazoloindolamine preparation reaction; protein tyrosine phosphatase inhibitor thiazoloindolamine reaction product. 90323-06-1 belongs to class thiazole, name is 4-(2-Nitrophenyl)thiazole-2-amine, and the molecular formula is C9H7N3O2S, Category: thiazole.

Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

Villa, Reymundo published the artcileStructure of FD-895 Revealed through Total Synthesis, Recommanded Product: (S)-4-Benzylthiazolidine-2-thione, the main research area is FD895 synthesis structure antitumor.

The total synthesis of FD-895 (I) was completed through a strategy that featured the use of a tandem esterification ring-closing metathesis (RCM) process to construct the 12-membered macrolide and a modified Stille coupling to append the side chain. These studies combined with detailed anal. of all four possible C16-C17 stereoisomers were used to confirm the structure of FD-895 and identify an analog with an enhanced subnanomolar bioactivity.

Organic Letters published new progress about Absolute configuration. 171877-39-7 belongs to class thiazole, name is (S)-4-Benzylthiazolidine-2-thione, and the molecular formula is C10H11NS2, Recommanded Product: (S)-4-Benzylthiazolidine-2-thione.

Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

Yamada, S. published the artcileRegio- and stereoselective synthesis of 1,4-dihydropyridines by way of an intramolecular interaction of a thiocarbonyl or carbonyl with a pyridinium nucleus, Product Details of C10H11NS2, the main research area is pyridine regioselective stereoselective preparation; thiocarbonyl interaction pyridinium; carbonyl interaction pyridinium; stereoselective regioselective nucleophilic addition acetal organometallic pyridinium salt; absolute configuration pyridine CD.

Chiral 1,4-dihydropyridines were prepared by the regio- and stereoselective addition of ketene silyl acetals and organometallic reagents to pyridinium salts. In the addition reaction, an intramol. interaction between the thiocarbonyl or carbonyl with the pyridinium nucleus plays an important role in bringing about the selectivities. The absolute configuration of the newly produced stereogenic center of the 1,4-dihydropyridines was determined by X-ray anal. and CD Cotton effects after conversion into the appropriate derivatives The working model for the stereoselectivity was proposed based on the ab initio calculations at the RHF/3-21G* level.

Tetrahedron published new progress about Absolute configuration. 171877-39-7 belongs to class thiazole, name is (S)-4-Benzylthiazolidine-2-thione, and the molecular formula is C10H11NS2, Product Details of C10H11NS2.

Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

Hitchin, James R. published the artcileDevelopment and evaluation of selective, reversible LSD1 inhibitors derived from fragments, Formula: C9H7N3O2S, the main research area is LSD1 inhibitor SAR anticancer acute myeloid leukemia MAOA protein.

Two series of aminothiazoles have been developed as reversible inhibitors of lysine specific demethylase 1 (LSD1) through the expansion of a hit derived from a high concentration biochem. fragment based screen of 2466 compounds The potency of the initial fragment hit was increased 32-fold through synthesis, with one series of compounds showing clear structure-activity relationships and inhibitory activities in the range of 7 to 187 μM in a biochem. assay. This series also showed selectivity against the related FAD-dependent enzyme mono-amine oxidase A (MAO-A). Although a wide range of irreversible inhibitors of LSD1 have been reported with activities in the low nanomolar range, this work represents one of the first reported examples of a reversible small mol. inhibitor of LSD1 with clear SAR and selectivity against MAO-A, and could provide a platform for the development of more potent reversible inhibitors. Herein, we also report the use of a recently developed cell-based assay for profiling LSD1 inhibitors, and present results on our own compounds as well as a selection of recently described reversible LSD1 inhibitors.

MedChemComm published new progress about Acute myeloid leukemia. 90323-06-1 belongs to class thiazole, name is 4-(2-Nitrophenyl)thiazole-2-amine, and the molecular formula is C9H7N3O2S, Formula: C9H7N3O2S.

Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

Aitken, R. Alan published the artcileSynthesis and pyrolytic behavior of thiazolidin-2-one 1,1-dioxides, Recommanded Product: (S)-4-Benzylthiazolidine-2-thione, the main research area is thiazolidinone dioxide preparation pyrolysis.

Four examples of chiral thiazolidin-2-one 1,1-dioxides I [R1 = PhCH2; R2 = H, PhCH2, Me2CH; R3 = H, Et; R1R2 = (CH2)3] have been prepared by reaction of the appropriate amino alcs. with CS2 in aqueous sodium hydroxide to give thiazolidine-2-thiones, followed by oxidation with KMnO4 under phase-transfer conditions in the presence of benzoic acid, either directly or via the thiazolidin-2-ones. Upon flash vacuum pyrolysis (FVP) at 650°C, I (R1 = PhCH2; R2 = H, PhCH2, Me2CH; R3 = H, Et) decompose mainly by loss of SO2 to give an alkene and benzyl isocyanate together with other products from fragmentation of the N-benzyl group. A significant minor pathway involves net loss of CO2 and water to give 2-phenyl-4,5-dihydrothiazoles together with their aromatization products. A mechanism for this new heterocyclic transformation is proposed involving initial expansion to a cyclic carbamic-sulfinic anhydride (2,1,4-oxathiazin-3-one 1-oxide).

Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry published new progress about Thermal decomposition. 171877-39-7 belongs to class thiazole, name is (S)-4-Benzylthiazolidine-2-thione, and the molecular formula is C10H11NS2, Recommanded Product: (S)-4-Benzylthiazolidine-2-thione.

Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

Deng, Xiao-Bing published the artcileA Convenient Synthesis of Thiazolidin-2-ones from Thiazolidine-2-thiones: Antibiotic Activity and Revisiting the Mechanism, Related Products of thiazole, the main research area is thiazolidinone preparation antifungal antibacterial activity; thiazolidinethione bromoethanol reactant thiazolidinone preparation.

Various substituted thiazolidin-2-ones were synthesized from the corresponding thiazolidine-2-thiones with bromoethanol in ethanol with sodium ethoxide as a base. The optimal reaction conditions and mechanism were reinvestigated in detail. The bioassay indicated that (S)-4-iso-butylthiazolidin-2-one and (S)-4-benzylthiazolidin-2-one show certain inhibitive activities against Candida albicans and Escherichia coli.

Phosphorus, Sulfur and Silicon and the Related Elements published new progress about Antibacterial agents. 171877-39-7 belongs to class thiazole, name is (S)-4-Benzylthiazolidine-2-thione, and the molecular formula is C10H11NS2, Related Products of thiazole.

Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica