1580-53-6Relevant academic research and scientific papers
Metal-Free Arylation-Lactonization Sequence of γ-Alkenoic Acids Using Anilines as Aryl Radical Precursors
Felipe-Blanco, Diego,Gonzalez-Gomez, Jose C.
supporting information, p. 7735 - 7744 (2019/12/24)
The presence of salicylic acid (10 mol-%) and H2O (10 equiv.) significantly improves the arylation-lactonization sequence of γ-alkenoic acids with in situ formed diazonium salts (from bench stable anilines). The reaction is finished in less than 5 h without thermal or photochemical activation, giving access to a variety of γ,γ-disubstituted butyrolactones. The protocol is user-friendly and can be used at gram-scale or adapted to transform alkenols into phthalanes. Control experiments revealed that aryl radicals participate in the reaction and a plausible mechanism is proposed to include this and other mechanistic investigations, for the catalyzed and the background reaction.
BENZOXAZOCINES AND THEIR THERAPEUTIC USE AS MONOAMINE REUPTAKE INHIBITORS
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Page/Page column 18, (2010/02/14)
Compounds having therapeutic utility are of general formula (1) wherein R, is H, C 1-C6 alkyl optionally substituted with F or C3-C6 cycloalkyl or C2-C4 alkenyl; A is O, CH2 or S(O)n where n is 0-2; one of W, X, Y and Z is N, CH or CR3 and the others are CH; R2 is C5-C6 heteroaryl, C5-C10 cycloalkyl or cycloalkenyl optionally containing one or more heteroatoms selected from O, N and S(O)n where n is 0-2, and optionally substituted with R3; or a phenyl group optionally substituted in one or more positions with one or more substituents independently selected from halogen, CN, CF3, C1-C6 alkyl and OR1, or the phenyl group is fused to a five or six membered ring which may be carbocyclic, heterocyclic (containing 1-2 heteroatoms selected from O, N and S), aromatic or heteroaromatic (containing 1-2 heteroatoms selected from O and N); R3 is selected from halogen; CF3; CN; OR5; SO2N(R5)2; COR5; CO2R5; CON(R5)2; NR1,COR4; NR1SO2R4; NR1CO2R4; NR1,CON(R5)2; OC1-C6 alkyl substituted with R3; C1-C6 alkyl optionally substituted with unsubstituted R3; C3-C6 cycloalkyl optionally substituted with unsubstituted R3; C2-Cs alkenyl optionally substituted with unsubstituted R3; C2-Cs alkynyl optionally substituted with unsubstituted R3; aryl optionally substituted with unsubstituted R3; and five or six membered aromatic heterocycles containing 1-4 heteroatoms selected from N and O; R4 is C1-C6 alkyl, C2-C6 alkenyl, C2-C6 alkynyl, C3-C6 cycloalkyl, aryl and heteroaryl; and R5 is H, C1-C6 alkyl; C2-C6 alkenyl, C2-C6 alkynyl, C3-C6 cycloalkyl, aryl or heteroaryl and is the same as or different to another R5; or a pharmaceutically acceptable salt thereof.
