86884-90-4Relevant academic research and scientific papers
A short and efficient asymmetric synthesis of (-)-frontalin, (-)-exo-isobrevicomin and a volatile contributor of beer-aroma
Singh, Surendra,Guiry, Patrick J.
, p. 5701 - 5706 (2010)
The natural products, (-)-frontalin and (+)-exo-isobrevicomin were synthesized employing Sharpless asymmetric epoxidation and ZrCl 4-catalyzed intramolecular acetalization as the key steps. (-)-Frontalin was synthesized in three steps with a 61
(R)-(2-METHYLOXIRAN-2-YL)METHYL 4-BROMOBENZENESULFONATE
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Page/Page column 13; 14; 15, (2020/11/13)
The present invention relates to compound of formula (I), wherein R1 is chloro, bromo iodo or a brosylate group. The present invention also relates to methods of making this compound and its use in carrying out organic transformations.
Asymmetric total synthesis of naturally occurring spirocyclic tetranorsesquiterpenoid lanceolactone A
Acharyya, Ranjan Kumar,Nanda, Samik
, p. 5027 - 5035 (2018/07/25)
Asymmetric total synthesis of naturally occurring γ-butenolide containing [4.4]spiro-tetrahydrofuran lanceolactone A has been reported in the present work. Bimetallic ("Pd-Cu") cascade cyclization was the crucial reaction employed for the construction of the γ-butenolide framework of the natural product. Subsequently, iodocyclization and reductive deiodination through a transfer hydrogenation reaction were applied to access the target molecule in an efficient manner.
SUBSTITUTED AMINOBUTYRIC DERIVATIVES AS NEPRILYSIN INHIBITORS
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Paragraph 0218, (2016/02/29)
In one aspect, the invention relates to compounds having the formula: where R1, R2a, R2b, R3-R6, a, b, Z, and X are as defined in the specification, or a pharmaceutically acceptable salt thereof. These compounds have neprilysin inhibition activity. In another aspect, the invention relates to pharmaceutical compositions comprising such compounds; methods of using such compounds; and processes and intermediates for preparing such compounds.
CARBAZOLE-CONTAINING AMIDES, CARBAMATES, AND UREAS AS CRYPTOCHROME MODULATORS
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Paragraph 0350, (2015/10/28)
The subject matter herein is directed to carbazole-containing amide, carbamate, and urea derivatives and pharmaceutically acceptable salts or hydrates thereof of structural formula I wherein the variable R1, R2, R3, R4, R5, R6, R7, A, D, E, G, J, L, M, Q, a, and b are accordingly described. Also provided are pharmaceutical compositions containing the compounds of formula I to treat a Cry-mediated disease or disorder, such as diabetes, complications associated with diabetes, Cushing's syndrome, NASH, NAFLD, asthma, and COPD.
Using an asymmetric flow reactor sharples
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Paragraph 0042-0046, (2019/05/21)
PROBLEM TO BE SOLVED: To provide a method for efficiently progressing a Sharpless asymmetric epoxidation even without adding molecular sieves. SOLUTION: The method for producing an optically active epoxyalcohol compound includes mixing an allyl alcohol compound, a titanium tetraalkoxide in a catalytic amount, an optically active tartaric acid ester in a catalytic amount, and an oxidizing agent, in a solvent by using a flow-type reactor (flow reactor). The oxidizing agent is preferably tert-butyl hydroperoxide or cumene hydroperoxide. COPYRIGHT: (C)2013,JPOandINPIT
Total synthesis of seco-plakortolide e and (-)-ent-plakortolide I: Absolute configurational revision of natural plakortolide i
Barnych, Bogdan,Vatele, Jean-Michel
supporting information; experimental part, p. 564 - 567 (2012/03/26)
A first total synthesis of (-)-ent-plakortolide I and seco-plakortolide E was accomplished from (S)-2-methylglycidol. The relevant key reactions involve a diastereoselective Mukaiyama aldol reaction, a regioselective hydroperoxysilylation, and elaboration of the 1,2-dioxane ring by intramolecular Michael addition of a hydroperoxide group to a butenolide. This synthesis allowed the revision of the absolute configuration of plakortolide I and structural revision of plakortolide E.
SYNTHETIC INTERMEDIATE OF OXAZOLE COMPOUND AND METHOD FOR PRODUCING THE SAME
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Page/Page column 41-42, (2011/08/21)
An object of the present invention is to provide a method for producing an oxazole compound in a high yield. The object can be achieved by a compound represented by Formula (11): wherein R1 is a hydrogen atom or lower-alkyl group; R2
Chemo- and stereoselectivity in titanium-mediated regioselective ring-opening reaction of epoxides at the more substituted carbon
Tanaka, Tetsuaki,Hiramatsu, Kei,Kobayashi, Yasutaka,Ohno, Hiroaki
, p. 6726 - 6742 (2007/10/03)
Chemo- and stereoselectivity in the ring-opening reaction of epoxides with a reagent prepared from allylmagnesium halide and chlorotitanium triphenoxide is described. It has been proven that the allylating reagent can also be used for the reaction of epoxides bearing a tert-butyl ester, amide, or acetal moiety, and that the epoxide cleavage regioselectively takes place at the more substituted carbon in all cases. Interestingly, while the reaction of acyclic 2,2,3-trialkyl epoxides or 3,3-disubstituted 2,3-epoxy alcohol derivatives with the allyltitanium reagent yielded the allylated products as an almost 1:1 diastereomixture, the ring-opening reaction of 2-substituted 2,3-epoxy alcohol derivatives stereospecifically proceeded through the anti pathway. The latter reaction is extremely useful for asymmetric construction of quaternary carbon centers.
1-SUBSTITUTED 4-NITROIMIDAZOLE COMPOUND AND PROCESS FOR PRODUCING THE SAME
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Page/Page column 47-48, (2010/02/12)
The present invention relates to a 1-substituted-4-nitroimidazole compound represented by the general formula (1) or a salt thereof, (wherein R is a hydrogen atom, a lower alkoxy group-substituted lower alkyl group, a phenyl-lower alkoxy group-substituted lower alkyl group, a cyano-substituted lower alkyl group, a phenyl-lower alkyl group which may have lower alkoxy groups as the substituents in the phenyl ring or a group of the formula -CH2RA; X is a halogen atom or a group of the formula -S(O)n-R1) and method for preparing the same. The compound of the formula (1) is a useful compound as an intermediate for synthesis of various pharmaceutical and agricultural chemicals, particularly, as intermediates for antitubercular agents.
