Global patent index - EP 0973708 A1

EP 0973708 A1 2000-01-26 - IMPROVED PROCESS FOR PREPARING CYCLOPROPYLACETYLENE

Title (en)

IMPROVED PROCESS FOR PREPARING CYCLOPROPYLACETYLENE

Title (de)

VERBESSERTES VERFAHREN ZUR HERSTELLUNG VON CYCLOPROPYLACETYLEN

Title (fr)

PROCEDE AMELIORE DE PRODUCTION DE CYCLOPROPYLACETYLENE

Publication

EP 0973708 A1 (DE)

Application

EP 98910701 A

Priority

  • DE 19709401 A
  • DE 19732292 A
  • EP 9800927 W

Abstract (en)

[origin: WO9840333A1] The invention concerns a process for halogenating cyclopropylmethyl ketone with at least one dihalogen triorganophosphorane of the general formula (I): R3PHal2, in which the R groups can be the same or different and designate a saturated or unsaturated aliphatic C1-C20 hydrocarbon group, a phenyl or C1-C4 alkylphenyl group which can optionally be further substituted by one to two fluorine, chlorine and/or nitro groups, P means phosphorus and Hal means chlorine, bromine or iodine, at 80 to 130 DEG C, the dihalogen triorganophosphorane of the general formula (I) being prepared in situ from triorganophosphane oxide or triorganophosphane sulphide of the general formula (II), R3PA, in which R has the meaning given under formula (I) and A stands for oxygen or sulphur, with a halogenation reagent. The process is characterized in that the triorganophosphane oxide or triorganophosphane sulphide is used in catalytic amounts. The invention also concerns the halogenation product of the cyclopropyl ketone obtained according to this process and a process for reacting it to form cyclopropylacetylene.

IPC 1-7 (main, further and additional classification)

C07C 17/18; C07C 1/30; C07C 13/04; C07C 22/00; C07F 9/535

IPC 8 full level (invention and additional information)

C07C 1/30 (2006.01); C07C 13/04 (2006.01); C07C 17/00 (2006.01); C07C 17/18 (2006.01); C07C 22/00 (2006.01); C07F 9/535 (2006.01)

CPC (invention and additional information)

C07F 9/535 (2013.01); C07C 1/30 (2013.01); C07C 17/00 (2013.01); C07C 17/18 (2013.01); C07C 2101/02 (2013.01)

Combination set (CPC)

  1. C07C 1/30 + C07C 13/04
  2. C07C 17/00 + C07C 22/00
  3. C07C 17/18 + C07C 22/00

Citation (search report)

See references of WO 9840333A1

Designated contracting state (EPC)

AT CH DE ES FR GB IT LI NL

EPO simple patent family

WO 9840333 A1 19980917; CA 2283118 A1 19980917; EP 0973708 A1 20000126; JP 2001514636 A 20010911; US 6207864 B1 20010327

INPADOC legal status

2003-03-05 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20020813

2001-06-27 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20010509

2000-01-26 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19990922

2000-01-26 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT CH DE ES FR GB IT LI NL