Process for producing (4E)-5-chloro-2-isopropyl-4-pentenoate...

Details Process for producing (4E)-5-chloro-2-isopropyl-4-pentenoate... Process for producing (4E)-5-chloro-2-isopropyl-4-pentenoate...

2007-06-19

2007-06-19

Saeed, Kamal A. (Department: 1626)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

Reexamination Certificate

active

11147255

ABSTRACT:
The present invention provides processes for producing a (4E)-5-chloro-2-isopropyl-4-pentenoate and an optical isomer of the (4E)-5-chloro-2-isopropyl-4-pentenoate, namely a process for producing a (4E)-5-chloro-2-isopropyl-4-pentenoate represented by the following formula (4), which comprises reacting a compound represented by the following formula (2) in the presence of an aprotic solvent (II) with a base (II) and then with (1E)-1,3-dichloro-1-propene to give a compound represented by the following formula (3), and dealkoxycarbonylating either ester in the compound represented by the following formula (3), and a process for producing a (S)-(4E)-5-chloro-2-isopropyl-4-pentenoate represented by the following formula (5), which comprises optically resolving a (4E)-5-chloro-2-isopropyl-4-pentenoate represented by the formula (4) obtained by the above-mentioned process (wherein R is a lower alkyl group or an aralkyl group).

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