- Realizing the Trifunctional Potential of Alkyl 4-Chloro-2-diazo-3-oxobutanoates: Convenient Assembly of 6,7-Dihydro-4 H-[1,2,3]triazolo[5,1-c][1,4]thiazine Core
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The first example of exploiting the trifunctional character of alkyl 4-chloro-2-diazo-3-oxobutanoates in the reactions with vicinal N, S-bis-nucleophiles leading to the formation of bicyclic 6,7-dihydro-4 H-[1,2,3]triazolo[5,1-c][1,4]thiazines is presente
- Dar'in, Dmitry,Kantin, Grigory,Khoroshilova, Olesya,Krasavin, Mikhail
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- PHARMACEUTICAL COMPOUNDS
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The invention provides compounds of the formula (1) or salts or tautomers thereof; wherein: Q is SO or SO2; n is 1 or 2; R1 is selected from hydrogen and a non-aromatic C1-6 hydrocarbon group; R2 and R3 are independently selected from hydrogen and a C1-6 hydrocarbon group; or R2 and R3 together with the carbon atom to which they are attached form a carbonyl group (C=O), a cyclopropane-1,1-diyl group or a cyclobutane-1,1-diyl group; or R together with R2 forms a C2-4 alkylene linker which is optionally substituted with one or more substituents selected from a C1-4 hydrocarbon group, halogen, hydroxy and amino; R4 and R5 are independently selected from hydrogen and a non-aromatic C1-6 hydrocarbon group; or R4 and R5 together with the carbon atom to which they are attached form a cyclopropane-1,1-diyl group or a cyclobutane-1,1-diyl group; and Ar1 is selected from phenyl, thiophenyl and furanyl,each being optionally substituted. The compounds are useful in medicine, for example in the treatment of diseases, such as cancers.
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Page/Page column 52-53
(2019/10/19)
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- Construction of tertiary chiral centers by Pd-catalyzed asymmetric allylic alkylation of prochiral enolate equivalents
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Abstract The palladium-catalyzed decarboxylative allylic alkylation of enol carbonates derived from lactams and ketones is described. Employing these substrates with an electronically tuned Pd catalyst system trisubstituted chiral centers are produced. These stereocenters have been previously challenging to achieve using Pd complex/chiral P-N ligand systems.
- Kita, Yusuke,Numajiri, Yoshitaka,Okamoto, Noriko,Stoltz, Brian M.
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supporting information
p. 6349 - 6353
(2015/08/18)
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- HALOALKYLSULFONANILIDE DERIVATIVE
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Novel herbicides are provided. A haloalkylsulfonanilide derivative represented by the formula (1) or an agrochemically acceptable salt thereof: the formula (1): wherein Z is —C(R9)(R10)— or —N(R11)—, A is an oxygen atom, a sulfur atom or —N(R12)—, W is an oxygen atom or a sulfur atom, m is an integer of from 0 to 3, n is an integer of from 0 to 3, m+n is from 1 to 3, R1 is halo C1-C6 alkyl, R2 is a hydrogen atom, C1-C6 alkyl or the like, each of R3 and R4 is independently a hydrogen atom, C1-C6 alkyl or the like, each of R5, R6, R7, R8, R9 and R10 is independently a hydrogen atom, a halogen, C1-C6 alkyl or the like, each of R11 and R12 is a hydrogen atom, C1-C6 alkyl, halo C1-C6 alkyl or the like, and X is independently a hydrogen atom, a halogen, C1-C6 alkyl, or the like.
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Page/Page column 45
(2012/02/06)
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- Base-promoted aminoethylation of thiols with 2-oxazolidinones: A simple synthesis of 2-aminoethyl sulfides
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A simple synthesis of 2-aminoethyl sulfides using a base-promoted reaction of 2-oxazolidinones with thiols is described. An application of this method to the synthesis of chiral 2-aminoethyl sulfides and sulfur-containing heterocyclic compounds is also presented.
- Ishibashi, Hiroyuki,Uegaki, Masayuki,Sakai, Manami,Takeda, Yoshifumi
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p. 2115 - 2120
(2007/10/03)
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- Cyclic amidine analogs as inhibitors of nitric oxide synthase
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Disclosed herein are compounds of Formula I STR1 and pharmaceutically acceptable salts thereof which have been found useful in the treatment of nitric oxide synthase mediated diseases and disorders, including neurodegenerative disorders, disorders of gastrointestinal motility and inflammation. These disease and disorders include hypotension, septic shock, toxic shock syndrom, hemodialysis, IL-2 therapy such as in cancer patients, cachexia, immunosuppression such as in transplant therapy, autoimmune and/or inflammatory indications including sunburn or psoriasis and respiratory conditions such as bronchitis, asthma, and acure respiratory distress (ARDS), myocarditis, heart failure, atherosclerosis, arthritis, rheumatoid arthritis, chronic or inflammatory bowel disease, ulcerative colitis, Crohn's disease, systemic lupus erythematosis (SLE), ocular conditions such as ocular hypertension and uveitis, type 1 diabetes, insulin-dependent diabetes mellitus and cystic fibrosis. Compounds of Formula I are also usful in the treatment of hypoxia, hyperbaric oxygen convulsions and toxicity, dementia, Sydenham's chorea, Parkinson's disease, Huntington's disease, amyotrophic lateral sclerosis, mulitple sclerosis, Korsakoff's disease, imbecility related to cerebral vessel disorder, ischemic brain edema, sleeping disorders, schizophrenia, depression, PMS, anxiety, drug addiction, pain, migraine, immune complex disease, as immunosupressive agents and for preventing or reversing tolerance to opiates and diazepines.
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- A Simple Synthesis of β-Amino Sulfides
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Thiols reacted with 2-oxazolidinones in the presence of alkoxides to give β-amino sulfides in high yields. The method was applied to the synthesis of 5,6-dihydro-1,4-thiazin-3(2H)-ones.
- Ishibashi, Hiroyuki,Uegaki, Masayuki,Sakai, Manami
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p. 915 - 916
(2007/10/03)
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- Sequential ring expansion and ketene elimination reactions in the novel rhodium(I)-catalyzed carbonylation of thiazolidines
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1,3-Thiazolidines react with carbon monoxide, in the presence of catalytic quantities of chloro(1,5-cyclooctadiene)rhodium(I) dimer and potassium iodide, to give thiazolidinones in 56-88% yields. Reaction in the absence of KI afforded the six-membered ring thiazin-3-one. The rhodium(I) complex can catalyze the quantitative conversion of the thiazin-3-one to the thiazolidinone under carbon monoxide, with ketene as the reaction by-product. The conversion of thiazolidines to thiazolidinones involves a novel regiospecific insertion of carbon monoxide into one of two ring carbon-nitrogen bonds, as well as a metal-catalyzed ketene elimination process.
- Khumtaveeporn, Kanjai,Alper, Howard
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p. 5662 - 5666
(2007/10/02)
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- Synthesis and Stereochemistry of rac.-trans-Tetrahydro-6-hydroxy-7-(4-methoxyphenyl)-1,4-thiazepin-5(2H)-one
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The base catalyzed reaction of 2-aminoethanethiol (3) with trans-3-(p-methoxyphenyl)glycidate (4) gave a mixture of isomeric lactams 5 and 6, and in addition, a by-product 7.The structures of these isomers were proven by X-ray crystallography.The data revealed that both isomers adopt the chair conformation in the solid state and the size of the heterocyclic ring in compound 5 is a six- and in compound 6 is a seven-membered ring.
- Mohacsi, Erno,O'Brien, Jay P.,Todaro, Louis J.
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p. 1085 - 1089
(2007/10/02)
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