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1. (WO1992010487) PROCESS FOR CONVERTING $g(a)-ACYL-SUBSTITUTED LACTONES TO $g(a)-ALKYLIDENE-SUBSTITUTED LACTONES
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1992/010487 International Application No.: PCT/US1991/009041
Publication Date: 25.06.1992 International Filing Date: 05.12.1991
Chapter 2 Demand Filed: 22.05.1992
IPC:
C07D 307/58 (2006.01) ,C07D 309/32 (2006.01)
C CHEMISTRY; METALLURGY
07
ORGANIC CHEMISTRY
D
HETEROCYCLIC COMPOUNDS
307
Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
02
not condensed with other rings
34
having two or three double bonds between ring members or between ring members and non-ring members
56
with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
58
One oxygen atom, e.g. butenolide
C CHEMISTRY; METALLURGY
07
ORGANIC CHEMISTRY
D
HETEROCYCLIC COMPOUNDS
309
Heterocyclic compounds containing six-membered rings having one oxygen atom as the only ring hetero atom, not condensed with other rings
32
having two double bonds between ring members or between ring members and non-ring members
Applicants:
HENKEL CORPORATION [US/US]; 300 Brookside Avenue Ambler, PA 19002, US
Inventors:
REBROVIC, Louis; US
Agent:
DRACH, John, E.; Henkel Corporation 140 Germantown Pike Suite 150 Plymouth Meeting, PA 19462, US
VON KREISLER, Alek; Deichmannhaus am Hauptbahnhof D-5000 Köln 1, DE
Priority Data:
626,66412.12.1990US
Title (EN) PROCESS FOR CONVERTING $g(a)-ACYL-SUBSTITUTED LACTONES TO $g(a)-ALKYLIDENE-SUBSTITUTED LACTONES
(FR) PROCEDE DE CONVERSION DE LACTONES A SUBSTITUTION $g(a)-ACYLE EN LACTONES A SUBSTITUTION $g(a)-ALKYLIDENE
Abstract:
(EN) A convenient stereoselective process for the preparation of $g(a)-alkylidene-substituted-$g(g)-butyrolactones and $g(d)-valerolactones is provided. The process involves reacting an $g(a)-acyl lactone, an aldehyde, and an alkali metal hydroxide in an inert diluent at an elevated temperature while removing water.
(FR) Procédé stéréosélectif de préparation de $g(g)-butyrolactones et de $g(d)-valérolactones à substitution $g(a)-akylidène. Le procédé consiste à faire réagir une $g(a)-acyle lactone, un aldéhyde et un hydroxyde de métal alcalin dans un diluant inerte à une température élevée tout en éliminant l'eau.
Designated States: JP
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LU, MC, NL, SE)
Publication Language: English (EN)
Filing Language: English (EN)