(19)
(11) EP 4 352 064 A1

(12)

(43) Date of publication:
17.04.2024 Bulletin 2024/16

(21) Application number: 21944657.2

(22) Date of filing: 11.06.2021
(51) International Patent Classification (IPC): 
C07D 513/04(2006.01)
(52) Cooperative Patent Classification (CPC):
C07D 513/04; C07D 495/04
(86) International application number:
PCT/CN2021/099884
(87) International publication number:
WO 2022/257151 (15.12.2022 Gazette 2022/50)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME
Designated Validation States:
KH MA MD TN

(71) Applicant: DSM IP Assets B.V.
6411 TE Heerlen (NL)

(72) Inventors:
  • BONRATH, Werner
    4303 Kaiseraugst (CH)
  • GAO, Bo
    4303 Kaiseraugst (CH)
  • PENG, Kun
    4303 Kaiseraugst (CH)
  • ZHANG, Qiong-Mei
    4303 Kaiseraugst (CH)

(74) Representative: dsm-firmenich IP 
DSM-Firmenich AG Wurmisweg 576
4303 Kaiseraugst
4303 Kaiseraugst (CH)

   


(54) PROCESS FOR PRODUCING BIOTIN INTERMEDIATE