139524-56-4Relevant academic research and scientific papers
Pushing radical cyclization from regioselective to regiospecific: Cyclization of amidyl radicals controlled by vinylic halogen substitution
Hu, Tianshun,Shen, Meihua,Chen, Qian,Li, Chaozhong
, p. 2647 - 2650 (2006)
Efficient and regiospecific 6-exo, 7-endo, 7-exo, and even 8-endo amidyl radical cyclizations can be accomplished by the direct reactions of unsaturated N-H amides if they bear a vinylic halogen (Cl, Br, I) substituent. This remarkable halogen-substitution effect could be rationalized in terms of lone pair-lone pair electron repulsion between the N radical and the vinylic halogen atom, in addition to the well-known steric and radical-stabilizing effect.
ETHYNYL COMPOUNDS
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Page/Page column 24, (2012/11/08)
The present invention relates to ethynyl derivatives of formula I X, G, R1, R2, R3, R3′, R4, R4′, R5, R6, R6′, m, and n are as defined herein or to a pharmaceutically acceptable acid addition salt, to a racemic mixture, or to its corresponding enantiomer and/or optical isomer and/or stereoisomer thereof. Compounds of formula I are positive allosteric modulators (PAM) of the metabotropic glutamate receptor subtype 5 (mGluR5). They can be used for the treatment of schizophrenia or cognitive disorders.
ETHYNYL DERIVATIVES AS POSITIVE ALLOSTERIC MODULATORS OF THE MGLUR5
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Page/Page column 32-33, (2012/11/13)
The present invention relates to ethynyl derivatives of formula I wherein X is N or C-R, wherein R is hydrogen or halogen; G is N or CH; with the proviso that maximum one of G or X can be nitrogen; R1 is phenyl or pyridinyl, which are optionally substituted by halogen; R2 is hydrogen, lower alkyl, hydroxy, lower alkoxy or C(O)O-benzyl; R3,R3', R4, R4, R6, R6' are independently from each other hydrogen or lower alkyl; or R6 and R4 may form together with the carbon atom to which they are attached a C4-6-cycloalkyl ring, if m is 0 and n is 1 or 2; R5 is hydrogen or lower alkyl; n is 0, 1 or 2; m is 0 or 1; with the proviso that n and m are not simultaneously 0; or to a pharmaceutically acceptable acid addition salt, to a racemic mixture, or to its corresponding enantiomer and/or optical isomer and/or stereoisomer thereof. It has now surprisingly been found that the compounds of general formula I are positive allosteric modulators (PAM) of the metabotropic glutamate receptor subtype 5 (mGluR5). They may be used for the treatment of schizophrenia or cognitive disorders.
