US 12,479,814 B2
Process for production of new sulfolenic intermediates
Werner Bonrath, Kaiseraugst (CH); Marc-André Mueller, Kaiseraugst (CH); Bettina Wuestenberg, Kaiseraugst (CH); and Viktor Zimmermann, Kaiseraugst (CH)
Assigned to DSM IP ASSETS B.V., Maastricht (NL)
Appl. No. 17/915,448
Filed by DSM IP ASSETS B.V., Heerlen (NL)
PCT Filed Mar. 22, 2021, PCT No. PCT/EP2021/057242
§ 371(c)(1), (2) Date Sep. 28, 2022,
PCT Pub. No. WO2021/197889, PCT Pub. Date Oct. 7, 2021.
Claims priority of application No. 20167023 (EP), filed on Mar. 31, 2020.
Prior Publication US 2023/0142429 A1, May 11, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C07D 333/48 (2006.01)
CPC C07D 333/48 (2013.01) 13 Claims
 
1. A process of the production of compounds of formula (I):

OG Complex Work Unit Chemistry
wherein
R is H or —(CO)—(CH2)nCH3, wherein n has a value of 0-14, or
R is —X(C1-4alkyl)3 or —X(C6H5)3, wherein X is Si or Ge, or
R is tetrahydro pyrane, isopropylmethyl ether or 2-methoxy-butylether, wherein
the process comprises reacting a compound of formula (II):

OG Complex Work Unit Chemistry
with a compound of formula (III):

OG Complex Work Unit Chemistry
to obtain the compound of formula (I), wherein
R in formula (III) has the same meanings as in formula (I).