2907-85-9Relevant academic research and scientific papers
Stereocontrol in Horner-Wadsworth-Emmons Condensations of α-Phosphono Lactones with Aldehydes: A Synthesis of Integerrinecic Acid and Senecic Acid Lactones
Lee, Koo,Jackson, John A.,Wiemer, David F.
, p. 5967 - 5971 (1993)
The Horner-Wadsworth-Emmons condensations of α-phosphono lactones were investigated under a variety of conditions.Upon treatment with KHMDS and 18-crown-6 in THF, condensations of the five-membered ring phosphono lactones 7a and 8 with propionaldehyde afforded the E olefins cleanly.In contrast, these phosphonates gave predominantly the Z olefins upon treatment with propionaldehyde, K2CO3 and 18-crown-6 in THF.A similar, though somewhat less-pronounced trend was observed with the six-membered ring phosphono lactone 9a.However, in its condensation with acetaldehyde the more functionalized phosphono lactone 4 gave the best E selectivity (ca. 9:1) when DBU/CH3CN was used, providing the methyl ester of integerrinecic acid lactone (5) in 77percent isolated yield.When K2CO3/18-crown-6/toluene was employed in a parallel reaction, only slight selectivity for the Z isomer was observed, but the methyl ester of senecic acid lactone (6) still was obtained in 43-46percent yield from the product mixture.
SUBSTITUTED IMIDAZOLECARBOXAMIDE AS BRUTON'S TYROSINE KINASE INHIBITORS
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Page/Page column 15-17, (2021/06/11)
The disclosure relates to a series of substituted imidazolecarboxamide compounds of formula I as BTK (Bruton's Tyrosine Kinase) inhibitors, and the methods of using the same for the treatment of autoimmune disease, inflammatory disease, cancer and potenti
Novel synthesis of physovenine and physostigmine analogs
Wang,Alluri,Nikogosyan,Decarlo,Monteiro,Mabagos,Feng,White,Bartolini,Andrisano,Zhang,Ganguly
, p. 3046 - 3049 (2016/07/06)
This Letter describes a versatile synthetic approach to prepare physovenine and physostigmine analogs. A series of analogs were synthesized and evaluated for cholinesterase inhibition activities, including human acetylcholinesterase (AChE) and butyrylchol
Base-catalyzed ethanolysis of α-diethoxyphosphoryl-γ-lactones: A facile synthesis of cyclopropanecarboxylates
Krawczyk, Henryk,Wa?sek, Katarzyna,K?dzia, Jacek
, p. 2648 - 2652 (2007/10/03)
A range of alkyl- and alkenylcyclopropanecarboxylic acid ethyl esters has been stereoselectively prepared by treatment of substituted α- diethoxyphosphoryl-γ-lactones with sodium ethoxide in tetrahydrofuran. Georg Thieme Verlag Stuttgart.
7-AMINO ALKYLIDENYL-HETEROCYCLIC QUINOLONES AND NAPHTHYRIDONES
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Page/Page column 51, (2008/06/13)
The present invention relates to compounds having a structure according to Formula I wherein n, m, z, R, R2, R3, R4, R5, R6, A, E, X, Y a and b are as defined above; or an optical isomer, diastereomer or enantiomer thereof; a pharmaceutically acceptable s
Asthma associated factors as targets for treating atopic allergies including asthma and related disorders
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Page 13, (2010/02/06)
This invention relates to methods for treating asthma or allergy in a mammal by administering a 3-aminosteroid compound to a mammal in need thereof. The 3-aminosteroid compound being capable of down regulating the IL-9 pathway and alleviating asthmatic responses to allergen. Exemplary aminosteroid compounds used in the methods of the invention include compounds having the chemical formula (I), wherein X, R1, R2, R3, and R4 groups arc as defined herein. ‘T’ he invention also relates to certain novel compound of formula (I). Moreover, the invention also provides methods for identifying an immunomodulatory 3-aminosteroid compound.
Intramolecular termination of radical-polar crossover reactions
Murphy, John A.,Rasheed, Faiza,Roome, Stephen J.,Scott, Karen A.,Lewis, Norman
, p. 2331 - 2339 (2007/10/03)
Cyclic ethers result from intramolecular trapping of cations formed through the radical-polar crossover process.
An enantiocontrolled synthesis of pyrrolizidines, (-)-platynecine and (-)-hadinecine
Kang, Sung Ho,Kim, Geun Tae,Yoo, Yong Sang
, p. 603 - 606 (2007/10/03)
Trisubstituted allylic alcohols 13 and 14 have been converted into a single isomeric trans-oxazoline 16 via an intramolecular iodoamidation of the corresponding trichloroacetimidates, which have been elaborated into (-)-platynecine 1 and(-)-hadinecine 2 via a common intermediate pyrrolizidine.
Termination of radical-polar crossover reactions by intramolecular nucleophiles
Murphy, John A.,Rasheed, Faiza,Roome, Stephen J.,Lewis, Norman
, p. 737 - 738 (2007/10/03)
Radical-polar crossover reactions featuring intramolecular nucleophilic termination are reported.
A CONVENIENT PREPARATION OF α-PHOSPHONO ESTERS AND LACTONES VIA C-P BOND FORMATION
Lee, Koo,Wiemer, David F.
, p. 87 - 90 (2007/10/02)
The reaction of ester and lactone enolates with diethyl phosphorochloridite, followed by air oxidation of the immediate reaction products, has proven to be a general alternative to the traditional Arbuzov synthesis of α-phosphono esters and lactones.
