scholarly journals Synthesis, neurotropic activity and SAR of new S-alkyl derivatives of 8-pyrazol-1-yl pyrano[3,4-c]pyridines

ARKIVOC ◽  
2022 ◽  
Vol 2022 (2) ◽  
Author(s):  
Shushanik Shamir Dashyan ◽  
Ruzanna Garnik Paronikyan ◽  
Suren Sergey Mamyan ◽  
Ervand Garnik Paronikyan
1984 ◽  
Vol 49 (1) ◽  
pp. 313-319 ◽  
Author(s):  
Věra Přikrylová ◽  
Petr Sedmera ◽  
Josef V. Jizba ◽  
Jindřich Vokoun ◽  
Helena Lipavská ◽  
...  

Reaction of daunomycinone (I) with alcohols and p-toluenesulfonic acid produces a mixture (~3 : 1) of its (7S)- and (7R)-O-alkyl derivatives II-IX. According to the 1H NMR evidence, the alicyclic ring exists in the 9H8 conformation in (7R)-O-alkyl derivatives, on the contrary to (7S)-epimers and 7-epi-daunomycinone that adopt the 8H9 conformation.


Author(s):  
D.M. Beltukova ◽  
V.P. Belik ◽  
Y.N. Antonenko ◽  
A.A. Bogdanov ◽  
G.A. Korshunova ◽  
...  

1990 ◽  
Vol 9 (1) ◽  
pp. 260-265 ◽  
Author(s):  
Rocco A. Paciello ◽  
Juan M. Manriquez ◽  
John E. Bercaw

1933 ◽  
Vol 55 (11) ◽  
pp. 4657-4662 ◽  
Author(s):  
Emil Klarmann ◽  
Louis W. Gates ◽  
Vladimir A. Shternov ◽  
Philip H. Cox

Author(s):  
J. A. Barltrop ◽  
R. M. Acheson ◽  
P. G. Philpott ◽  
K. E. MacPhee ◽  
J. S. Hunt

1966 ◽  
Vol 44 (11) ◽  
pp. 1247-1258 ◽  
Author(s):  
Raj Nandan Prasad ◽  
Karin Tietje

The formation of 3-oxo-3,4-dihydro-2H-1,4-benzothiazine (IIIa) by cyclization of alkyl 2-haloacetamidophenyl sulfides (I) was investigated; it is proposed that the reaction proceeds via a six-membered sulfonium halide. The preparation of 4-alkyl derivatives of IIIa and of 4-alkyl and 4-acyl derivatives of its reduction product 3,4-dihydro-2H-1,4-benzothiazine (Va) is described. Acylation of Va was shown to proceed without opening of the thiazine ring. Preparation of the O-benzoyl, N-benzoyl, and O,N-dibenzoyl derivatives of 2-(β-hydroxyethyl-mercapto)aniline (VIII) has permitted clarification of the confusion in the literature with respect to the derivatives of Va and VIII. Compound XVIII, the 1,1-dioxide of IIIa, undergoes C-alkylation at the 2-position when treated with alkyl halides, rather than O-alkylation as previously suggested.


Tetrahedron ◽  
2006 ◽  
Vol 62 (20) ◽  
pp. 4979-4987 ◽  
Author(s):  
Benjamin K.H. Chan ◽  
Bing Deng ◽  
Michael W. Jones ◽  
Roger W. Read

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