Synthesis of Polynuclear Heterocycles; Part 51. New Selective Methods for the Synthesis of Indazolo[2,3-a][3,1]benzoxazin-5-ones and Indazolo [2,1-g]indazole-6,12-diones
One‐Pot Manganese (I)‐Catalyzed Oxidant‐Controlled Divergent Functionalization of 2‐Arylindazoles
作者:Krishna Kanta Das、Asim Kumar Ghosh、Alakananda Hajra
DOI:10.1002/chem.202302849
日期:2024.1.16
Abstract
The oxidant‐controlled divergent synthesis of C‐2′ formyl 2H‐indazoles and indazoloindazolediones has been developed through Mn(I)‐ catalyzed ortho C−H functionalization of 2H‐indazoles with para‐formaldehyde to afford C‐2′ hydroxymethylated 2H‐indazoles and subsequently oxidation with varying the amount of DDQ in one‐pot. By employing selectfluor as the oxidant instead of DDQ, this reaction exclusively provided indazolebenzoxazine derivatives. This strategy delivered unsymmetrical indazoloindazoledione and indazolobenzoxazine with varied functional group tolerance in moderate to good yields.
Alkahader, Mohamed A.; Smalley, Robert K., Journal of Chemical Research, Miniprint, 1982, # 11, p. 3283 - 3292
作者:Alkahader, Mohamed A.、Smalley, Robert K.
DOI:——
日期:——
ALKHADER M. A.; SMALLEY R. K.; MOHAJERANI B., SYNTHESIS, 1980, NO 5, 381-383
作者:ALKHADER M. A.、 SMALLEY R. K.、 MOHAJERANI B.
DOI:——
日期:——
ALKHADER, M. A.;SMALLEY, R. K., J. CHEM. RES. MICROFICHE, 1982, N 11, 295
作者:ALKHADER, M. A.、SMALLEY, R. K.
DOI:——
日期:——
Synthesis of Polynuclear Heterocycles; Part 5<sup>1</sup>. New Selective Methods for the Synthesis of Indazolo[2,3-<i>a</i>][3,1]benzoxazin-5-ones and Indazolo [2,1-<i>g</i>]indazole-6,12-diones
作者:Mohamed A. Alkhader、Robert K. Smalley、Bagher Mohajerani