Rh(III)-catalyzed C7-alkylation of isatogens (indolin-3-one N-oxides) with malonicacid diazoesters has been developed. This strategy utilizes oxygen anion on the N-oxide group of isatogens as a directing group and successfully achieves the synthesis of a series of C7-alkylated isatogens with moderate to good yields (48–86% yields). Moreover, the N-oxides of isatogens can not only serve as the simple
Ru-Catalyzed Redox-Neutral Cleavage of the N–O Bond in Isoxazolidines: Isatogens to Pseudoindoxyls via a One-Pot [3 + 2]-Cycloaddition/N–O Cleavage
作者:Chepuri V. Suneel Kumar、Chepuri V. Ramana
DOI:10.1021/acs.orglett.5b00837
日期:2015.6.19
A novel metal-catalyzed oxygen atom transfer reaction onto olefins is reported. By taking isatogens as substrates, a one-pot [3 + 2]-cycloaddition of nitrone with olefins followed by the Ru-catalyzed redox-neutral N-O bond cleavage of intermediate isoxazolidine has been executed as a simple method for the synthesis of 2,2-disubstituted pseudoindoxyls.
AuBr3-catalyzed cyclization of o-(alkynyl)nitrobenzenes. Efficient synthesis of isatogens and anthranils
作者:Naoki Asao、Kenichiro Sato、Yoshinori Yamamoto
DOI:10.1016/s0040-4039(03)01357-1
日期:2003.7
The cyclization of o-(arylalkynyl)nitrobenzenes was catalyzed by AuBr3 to produce the corresponding isatogens in good to high yields together with small amounts of anthranils. On the other hand, anthranils were obtained selectively when the AuBr3-catalyzed reaction was carried out using o-(alkylalkynyl)nitrobenzenes. (C) 2003 Elsevier Ltd. All rights reserved.
Sahasrabudhe, A. B.; Kamath, H. V.; Bapat, B. V., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1980, vol. 19, # 3, p. 230 - 232
作者:Sahasrabudhe, A. B.、Kamath, H. V.、Bapat, B. V.、Kulkarni, Sheshgiri N.
DOI:——
日期:——
SAHASRABUDHE A. B.; KAMATH H. V.; BAPAT B. V.; KULKARNI S. N., INDIAN J. CHEM., 1980, B19, NO 3, 230-232
作者:SAHASRABUDHE A. B.、 KAMATH H. V.、 BAPAT B. V.、 KULKARNI S. N.