EP 1071644 A1 20010131 - METHOD FOR THE SELECTIVE HYDROLYSIS OF ACETALS OR KETALS IN THE PRESENCE OF PHTHALIDES
Title (en)
METHOD FOR THE SELECTIVE HYDROLYSIS OF ACETALS OR KETALS IN THE PRESENCE OF PHTHALIDES
Title (de)
VERFAHREN ZUR SELEKTIVEN HYDROLYSE VON ACETALEN BZW. KETALEN IN GEGENWART VON PHTHALIDEN
Title (fr)
PROCEDE D'HYDROLYSE SELECTIVE D'ACETALS OU DE CETALS EN PRESENCE DE PHTALIDES
Publication
Application
Priority
- DE 19808296 A 19980227
- EP 9900954 W 19990213
Abstract (en)
[origin: DE19808296A1] The invention relates to a method for the selective hydrolysis of acetals in the presence of phthalides. According to said method a mixture (M) containing a) a phthalide of the formula (I) and b) an acetal or ketal of the formula (II) is reacted in the presence of between 1 and 10 mol water relative to the quantity of acetals or ketals of formula (II) at temperatures of between 10 and 200 DEG C, whereby the acetal or ketal of formula (II) is hydrolysed to the corresponding aldehyde or ketone. The substituents R<1>-R<8> have the meanings given in the description.
IPC 1-7
IPC 8 full level
C07C 45/42 (2006.01); C07C 45/51 (2006.01); C07C 45/59 (2006.01); C07C 47/542 (2006.01); C07D 307/88 (2006.01); C25B 3/25 (2021.01)
CPC (source: EP US)
C07C 45/515 (2013.01 - EP US); C07C 45/59 (2013.01 - EP US); C07D 307/88 (2013.01 - EP US)
Citation (search report)
See references of WO 9943640A1
Designated contracting state (EPC)
BE CH DE ES FR GB IT LI NL SE
DOCDB simple family (publication)
DE 19808296 A1 19990902; CA 2321847 A1 19990902; CN 1165505 C 20040908; CN 1291969 A 20010418; EP 1071644 A1 20010131; JP 2002504533 A 20020212; US 6245945 B1 20010612; WO 9943640 A1 19990902
DOCDB simple family (application)
DE 19808296 A 19980227; CA 2321847 A 19990213; CN 99803329 A 19990213; EP 9900954 W 19990213; EP 99913162 A 19990213; JP 2000533399 A 19990213; US 62305900 A 20000825