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Nano n ‐propylsulfonated γ‐Al 2 O 3 : a new, efficient and reusable catalyst for synthesis of spiro[indoline‐3,4‐pyrazolo[3,4‐ e ][1,4]thiazepine]diones in aqueous media
Author(s) -
Wu Li Qiang
Publication year - 2013
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.2942
Subject(s) - indoline , chemistry , catalysis , reagent , aqueous medium , aqueous solution , nano , combinatorial chemistry , organic chemistry , chemical engineering , engineering
Nano n ‐propylsulfonated γ‐Al 2 O 3 is easily prepared by the reaction of nano γ‐Al 2 O 3 with 1,3‐propanesultone. This reagent can be used as an efficient catalyst for the synthesis of spiro [indoline‐3,4‐pyrazolo[3,4‐ e ][1,4]thiazepine]diones in aqueous media. This new method consistently has the advantages of excellent yields and short reaction times. Further, the catalyst can be reused and recovered several times. Copyright © 2013 John Wiley & Sons, Ltd.