For the preparation of 3-alkoxyphthalides from phthalaldehydes and alcohols, a cyclization reaction in the presence of a rhodium(III) catalyst and copper(II) salt is reported. Cyclization of phthalaldehydes also occurs with 1,3-dicarbonyl compounds under similar conditions to produce 3-substituted phthalides in good yields. An acylrhodium(III) species might be a key intermediate in these cyclization
Forming germicidal aromatic dialdehydes with acetals
申请人:ETHICON, INC.
公开号:EP1738646B1
公开(公告)日:2013-03-20
MIRSADEGHI SEID; RICKBORN B., J. ORG. CHEM., 52,(1987) N 5, 787-792
作者:MIRSADEGHI SEID、 RICKBORN B.
DOI:——
日期:——
US7291649B2
申请人:——
公开号:US7291649B2
公开(公告)日:2007-11-06
Smart solution chemistry: Prolonging the lifetime of<i>ortho</i>-phthalaldehyde disinfection solutions
作者:Bobby N. Brewer、Keith T. Mead、Charles U. Pittman、Kaitao Lu、Peter C. Zhu
DOI:10.1002/jhet.5570430216
日期:2006.3
The oxidation of ortho-phthalaldehyde to phthalic acid in aqueous solutions can be remedied by the addition of various cyclic acetals, which, when reacted with phthalic acid, yields ortho-phthalaldehyde, thus prolonging the lifetime of the ortho-phthalaldehyde disinfection solution.